Pub Date : 2026-05-01Epub Date: 2026-02-06DOI: 10.1016/j.jssc.2026.125885
Woo Jin Noh , Yiyang Sun , Xiaoyan Jin
The hydrogen evolution reaction (HER) is an essential step in the production of green hydrogen; however, its overall efficiency is limited by slow catalytic kinetics. Among the alternatives to commercial Pt catalysts, MoS2 has garnered significant attention because of its earth-abundant nature and promising catalytic activity. However, the HER performance of MoS2 remains unsatisfactory owing to the low conductivity and limited activity of its basal planes. Herein we develop a lattice engineering methodology of exfoliation−restacking processes to regulate the crystal phase, interlayer spacing, and structural disorder in the MoS2 nanosheets. The exfoliation of MoS2 led to the phase transition to conductive 1Tʹ-MoS2 with significant structural disorder, whereas the subsequent restacking with bulky tetrapentylammonium ions caused the partial restoration of structural order as well as the expansion of interlayer distance. The combined exfoliation−restacking strategy allowed to optimize the HER activity of MoS2 with decreased overpotential and increased current density, which could be attributed to the creation of abundant active sites and the optimization of charge and mass transports. The present study revealed that the synergetic combination of exfoliation and restacking processes could offer an effective means to boost the electrocatalyst functionality of MoS2-containing electrocatalysts.
{"title":"Complementary roles of exfoliation and restacking processes in boosting hydrogen evolution activity of MoS2 nanosheets","authors":"Woo Jin Noh , Yiyang Sun , Xiaoyan Jin","doi":"10.1016/j.jssc.2026.125885","DOIUrl":"10.1016/j.jssc.2026.125885","url":null,"abstract":"<div><div>The hydrogen evolution reaction (HER) is an essential step in the production of green hydrogen; however, its overall efficiency is limited by slow catalytic kinetics. Among the alternatives to commercial Pt catalysts, MoS<sub>2</sub> has garnered significant attention because of its earth-abundant nature and promising catalytic activity. However, the HER performance of MoS<sub>2</sub> remains unsatisfactory owing to the low conductivity and limited activity of its basal planes. Herein we develop a lattice engineering methodology of exfoliation−restacking processes to regulate the crystal phase, interlayer spacing, and structural disorder in the MoS<sub>2</sub> nanosheets. The exfoliation of MoS<sub>2</sub> led to the phase transition to conductive 1Tʹ-MoS<sub>2</sub> with significant structural disorder, whereas the subsequent restacking with bulky tetrapentylammonium ions caused the partial restoration of structural order as well as the expansion of interlayer distance. The combined exfoliation−restacking strategy allowed to optimize the HER activity of MoS<sub>2</sub> with decreased overpotential and increased current density, which could be attributed to the creation of abundant active sites and the optimization of charge and mass transports. The present study revealed that the synergetic combination of exfoliation and restacking processes could offer an effective means to boost the electrocatalyst functionality of MoS<sub>2</sub>-containing electrocatalysts.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125885"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-30DOI: 10.1016/j.jssc.2026.125867
Jun Zhao , Yang Liu , Ting Xu , Wen Li , Ren bo Meng , Lu lu Tang , Dong dong Liu , cheng Fu Xu , Neng mei Deng
This study presents a novel mechanochemical approach for synthesizing metal-organic frameworks (MOFs) by employing a gas-solid two-phase flow low-temperature solid-phase reaction system. This method fundamentally overcomes the limitations of conventional solvothermal synthesis, such as high energy consumption, long reaction times, and the extensive use of organic solvents, by leveraging gas-solid interactions and low-temperature solid-state mechanochemistry. We demonstrate the efficient fabrication of high-purity MOFs with excellent crystallinity, controlled porosity, and enhanced stability. Beyond establishing an efficient and environmentally benign synthetic pathway, this work provides in-depth insights into the underlying formation mechanisms. The proposed strategy not only significantly reduces the environmental footprint of MOF production but also offers a scalable and sustainable platform for their manufacturing.
{"title":"Mechanochemical synthesis of metal-organic frameworks: An efficient green pathway and mechanistic investigation","authors":"Jun Zhao , Yang Liu , Ting Xu , Wen Li , Ren bo Meng , Lu lu Tang , Dong dong Liu , cheng Fu Xu , Neng mei Deng","doi":"10.1016/j.jssc.2026.125867","DOIUrl":"10.1016/j.jssc.2026.125867","url":null,"abstract":"<div><div>This study presents a novel mechanochemical approach for synthesizing metal-organic frameworks (MOFs) by employing a gas-solid two-phase flow low-temperature solid-phase reaction system. This method fundamentally overcomes the limitations of conventional solvothermal synthesis, such as high energy consumption, long reaction times, and the extensive use of organic solvents, by leveraging gas-solid interactions and low-temperature solid-state mechanochemistry. We demonstrate the efficient fabrication of high-purity MOFs with excellent crystallinity, controlled porosity, and enhanced stability. Beyond establishing an efficient and environmentally benign synthetic pathway, this work provides in-depth insights into the underlying formation mechanisms. The proposed strategy not only significantly reduces the environmental footprint of MOF production but also offers a scalable and sustainable platform for their manufacturing.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125867"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-23DOI: 10.1016/j.jssc.2026.125842
R.N. Bhowmik , Bipin Kumar Parida , Amit Kumar , P.D. Babu , S.M. Yusuf
The strategy of breaking antiferromagnetic (AFM) ground state in α-Fe2O3 by doping non-magnetic Sc3+ (3 d0) ions at the Fe3+ (3 d5) sites has been used in Fe2-xScxO3 system (x = 0.2–1.0). The material has been stabilized in single-phase (rhombohedral α-Fe2O3) or mix-phase (rhombohedral α-Fe2O3 and cubic Sc2O3-types) structure by varying Sc content and heat treatment temperature. Neutron diffraction confirmed perturbed AFM ground state down to low temperature with magnetic moment ∼ 2.75–4.68 μB/Fe site and Morin transition ∼ 260 K. DC magnetic measurement showed magnetic coercivity 0.2 to 6 kOe. The material showed transformation from insulating state (conductivity 10−14-10−10 S/cm and polarization 0.5–2 μC/cm2) to high conductive state (conductivity ∼ 10−10 -10−7 S/cm and polarization >2 μC/cm2) above the Morin transition. The room temperature measurements showed maximum current density 35–186 μA/cm2, electric polarization 2.7–15.6 μC/cm2, magneto-electric voltage up to 5 mV with coupling constant αME ∼0.62–10.11 mV/Oe.cm and magneto-conductance up to 90 %. The results will open the door for suitably modifying the lattice-structure, magnetic spin order, and charge-spin coupling in hematite based material and their application in low power spintronic devices.
{"title":"Role of lattice structure and breaking of antiferromagnetic spin order in enhancement of ferromagnetic, electronic, and magneto-electric properties in Fe2-xScxO3 system","authors":"R.N. Bhowmik , Bipin Kumar Parida , Amit Kumar , P.D. Babu , S.M. Yusuf","doi":"10.1016/j.jssc.2026.125842","DOIUrl":"10.1016/j.jssc.2026.125842","url":null,"abstract":"<div><div>The strategy of breaking antiferromagnetic (AFM) ground state in α-Fe<sub>2</sub>O<sub>3</sub> by doping non-magnetic Sc<sup>3+</sup> (3 d<sup>0</sup>) ions at the Fe<sup>3+</sup> (3 d<sup>5</sup>) sites has been used in Fe<sub>2-x</sub>Sc<sub>x</sub>O<sub>3</sub> system (x = 0.2–1.0). The material has been stabilized in single-phase (rhombohedral α-Fe<sub>2</sub>O<sub>3</sub>) or mix-phase (rhombohedral α-Fe<sub>2</sub>O<sub>3</sub> and cubic Sc<sub>2</sub>O<sub>3</sub>-types) structure by varying Sc content and heat treatment temperature. Neutron diffraction confirmed perturbed AFM ground state down to low temperature with magnetic moment ∼ 2.75–4.68 μB/Fe site and Morin transition ∼ 260 K. DC magnetic measurement showed magnetic coercivity 0.2 to 6 kOe. The material showed transformation from insulating state (conductivity 10<sup>−14</sup>-10<sup>−10</sup> S/cm and polarization 0.5–2 μC/cm<sup>2</sup>) to high conductive state (conductivity ∼ 10<sup>−10</sup> -10<sup>−7</sup> S/cm and polarization >2 μC/cm<sup>2</sup>) above the Morin transition. The room temperature measurements showed maximum current density 35–186 μA/cm<sup>2</sup>, electric polarization 2.7–15.6 μC/cm<sup>2</sup>, magneto-electric voltage up to 5 mV with coupling constant α<sub>ME</sub> ∼0.62–10.11 mV/Oe.cm and magneto-conductance up to 90 %. The results will open the door for suitably modifying the lattice-structure, magnetic spin order, and charge-spin coupling in hematite based material and their application in low power spintronic devices.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125842"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-26DOI: 10.1016/j.jssc.2026.125855
Varvara V. Avdeeva, Alexey S. Kubasov, Aleksey V. Golubev, Aleksandr Yu Bykov, Nikolay T. Kuznetsov
The complexation of iron(II)/iron(III), cobalt(II), and nickel(II) with 1,10-phenanthroline (phen) in the presence of the highly chlorinated boron cluster anion [B12Cl12]2– was investigated. The reactions of FeCl2 and NiCl2 with phen (1:3 ratio) readily form the stable tris-chelate complexes [M(phen)3][B12Cl12] (M = Fe (1), Ni (2)), which were isolated and characterized by X-ray diffraction. In contrast to the reducing behavior of [BnHn]2– anions (n = 10, 12), the [B12Cl12]2– anion does not reduce iron(III), allowing for the first isolation of a stable iron(III) complex with a polyhedral borane counterion. Specifically, the reaction of FeCl3 with phen (1:2 ratio) yielded the binuclear μ-oxo complex [Cl(phen)2FeOFe(phen)2Cl][B12Cl12] (3). Surprisingly, all attempts to form analogous tris-chelate cobalt(II) complex with [B12Cl12]2– were unsuccessful, resulting only in the precipitation of known cobalt phenanthroline chlorides or nitrates, while the borate salt remained unreacted. This inertness was confirmed by direct mixing experiments and reactions with cobalt(III) ammine complexes. However, the hydroxyl-functionalized analog, [B12Cl10(OH)2]2–, effectively formed the ion-pair complex [Co(phen)3][B12Cl10(OH)2] (4). The results highlight a stark difference in the coordinating and crystallizing ability of [B12C12]2– compared to its well-studied hydride analogs and less chlorinated counterparts, underscoring the critical role of the anion hydrophobicity and specific functionalization in stabilizing metal complexes and their rapid precipitation from the reaction solution.
{"title":"Iron and nickel vs. cobalt: Precipitation of tris-chelate phenanthroline complexes [ML3][B12Cl12] from the solution","authors":"Varvara V. Avdeeva, Alexey S. Kubasov, Aleksey V. Golubev, Aleksandr Yu Bykov, Nikolay T. Kuznetsov","doi":"10.1016/j.jssc.2026.125855","DOIUrl":"10.1016/j.jssc.2026.125855","url":null,"abstract":"<div><div>The complexation of iron(II)/iron(III), cobalt(II), and nickel(II) with 1,10-phenanthroline (phen) in the presence of the highly chlorinated boron cluster anion [B<sub>12</sub>Cl<sub>12</sub>]<sup>2–</sup> was investigated. The reactions of FeCl<sub>2</sub> and NiCl<sub>2</sub> with phen (1:3 ratio) readily form the stable <em>tris</em>-chelate complexes [M(phen)<sub>3</sub>][B<sub>12</sub>Cl<sub>12</sub>] (M = Fe (<strong>1</strong>), Ni (<strong>2</strong>)), which were isolated and characterized by X-ray diffraction. In contrast to the reducing behavior of [B<sub><em>n</em></sub>H<sub><em>n</em></sub>]<sup>2–</sup> anions (<em>n</em> = 10, 12), the [B<sub>12</sub>Cl<sub>12</sub>]<sup>2–</sup> anion does not reduce iron(III), allowing for the first isolation of a stable iron(III) complex with a polyhedral borane counterion. Specifically, the reaction of FeCl<sub>3</sub> with phen (1:2 ratio) yielded the binuclear μ-oxo complex [Cl(phen)<sub>2</sub>FeOFe(phen)<sub>2</sub>Cl][B<sub>12</sub>Cl<sub>12</sub>] (<strong>3</strong>). Surprisingly, all attempts to form analogous tris-chelate cobalt(II) complex with [B<sub>12</sub>Cl<sub>12</sub>]<sup>2–</sup> were unsuccessful, resulting only in the precipitation of known cobalt phenanthroline chlorides or nitrates, while the borate salt remained unreacted. This inertness was confirmed by direct mixing experiments and reactions with cobalt(III) ammine complexes. However, the hydroxyl-functionalized analog, [B<sub>12</sub>Cl<sub>10</sub>(OH)<sub>2</sub>]<sup>2–</sup>, effectively formed the ion-pair complex [Co(phen)<sub>3</sub>][B<sub>12</sub>Cl<sub>10</sub>(OH)<sub>2</sub>] (<strong>4</strong>). The results highlight a stark difference in the coordinating and crystallizing ability of [B<sub>12</sub>C<sub>12</sub>]<sup>2–</sup> compared to its well-studied hydride analogs and less chlorinated counterparts, underscoring the critical role of the anion hydrophobicity and specific functionalization in stabilizing metal complexes and their rapid precipitation from the reaction solution.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125855"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-24DOI: 10.1016/j.jssc.2026.125850
Zuliang Wang , Aotian Gu , Chunhui Gong , Xiqing Xu , Peng Wang , Yi Yang
This work describes the synthesis of a ZrP–C composite adsorbent using MOF-808 as a template via one-step, high-temperature carbonization. The adsorption performance of ZrP–C material toward fluoride ions was investigated as a function of time, solution concentration, temperature, pH, and coexisting anions. After 3 h, the ZrP–C-3 adsorbent achieved saturation in fluoride uptake, demonstrating a final uptake of 37 mg/g at equilibrium. Fit the adsorption process using kinetic and isothermal adsorption models. The study revealed that adsorption was dominated by monolayer chemical adsorption. Adsorption was found to be endothermic, according to thermodynamic studies, with higher temperatures favoring increased uptake. Combined XPS, XRD, and FT-IR studies revealed that ion exchange, surface complexation, and electrostatic interactions jointly governed fluoride removal. For low-concentration fluoride-containing water bodies, typically those with concentrations below 20 mg/L, adding an appropriate amount of adsorbent could effectively reduce the wastewater concentration to meet national standards. These results highlight the strong potential of ZrP–C-3 for practical applications in fluoride removal from wastewater.
{"title":"Synthesis of ZrP–C using MOF-808 as a template and investigation of its fluoride ion adsorption","authors":"Zuliang Wang , Aotian Gu , Chunhui Gong , Xiqing Xu , Peng Wang , Yi Yang","doi":"10.1016/j.jssc.2026.125850","DOIUrl":"10.1016/j.jssc.2026.125850","url":null,"abstract":"<div><div>This work describes the synthesis of a ZrP–C composite adsorbent using MOF-808 as a template via one-step, high-temperature carbonization. The adsorption performance of ZrP–C material toward fluoride ions was investigated as a function of time, solution concentration, temperature, pH, and coexisting anions. After 3 h, the ZrP–C-3 adsorbent achieved saturation in fluoride uptake, demonstrating a final uptake of 37 mg/g at equilibrium. Fit the adsorption process using kinetic and isothermal adsorption models. The study revealed that adsorption was dominated by monolayer chemical adsorption. Adsorption was found to be endothermic, according to thermodynamic studies, with higher temperatures favoring increased uptake. Combined XPS, XRD, and FT-IR studies revealed that ion exchange, surface complexation, and electrostatic interactions jointly governed fluoride removal. For low-concentration fluoride-containing water bodies, typically those with concentrations below 20 mg/L, adding an appropriate amount of adsorbent could effectively reduce the wastewater concentration to meet national standards. These results highlight the strong potential of ZrP–C-3 for practical applications in fluoride removal from wastewater.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125850"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-29DOI: 10.1016/j.jssc.2026.125868
Zixun Yan , Yuling Zhang , Jing Bai , Xiaofeng Zeng , Qiulin Deng , Yushuan Peng , Qijia You , Hongquan Deng , Faqin Dong , Chongqing Wang
Utilizing an in situ growth technique, a novel composite (PPG@UiO-66) based on phosphogypsum was prepared for the effective elimination of Pb(II) from multi-ionic aqueous environments and the beneficial reuse of this industrial byproduct. Optimize material properties by adjusting raw material ratios and analyzing adsorption conditions using response surface methodology (RSM). Under optimized conditions (25 °C, pH 5, 200 mg L−1 initial Pb(II)), PPG@UiO-66 adsorbed Pb(II) with a concentration of 459.59 mg g−1. Kinetic and isothermal modeling revealed that the adsorption process obeys pseudo-second-order kinetics, indicative of a chemisorption mechanism. The Langmuir model describes monolayer adsorption on a homogeneous surface. Fixed-bed experiments confirmed PPG@UiO-66's dynamic adsorption uptake of 8.42 mg g−1 in industrial oil and gas field wastewater. The Thomas (R2 = 0.991) and Yoon-Nelson (R2 = 0.963) model validated their highly efficient adsorption capacity and engineering application potential in continuous flow systems. The intrinsic mechanism of adsorption was systematically investigated. This material achieves Pb(II) removal through carboxylate coordination, ion exchange, and lead sulfate precipitation. The adsorbed material causes no secondary pollution, and heavy metal release levels remain below safety thresholds. This study provides a high-performance adsorbent material for treating wastewater from lead-contaminated oil and gas fields, offering significant environmental benefits and practical application value.
{"title":"Exceptional selectivity removal of Pb(II) from multi-ion wastewater using phosphogypsum-based UiO-66 composite via response surface methodology","authors":"Zixun Yan , Yuling Zhang , Jing Bai , Xiaofeng Zeng , Qiulin Deng , Yushuan Peng , Qijia You , Hongquan Deng , Faqin Dong , Chongqing Wang","doi":"10.1016/j.jssc.2026.125868","DOIUrl":"10.1016/j.jssc.2026.125868","url":null,"abstract":"<div><div>Utilizing an in situ growth technique, a novel composite (PPG@UiO-66) based on phosphogypsum was prepared for the effective elimination of Pb(II) from multi-ionic aqueous environments and the beneficial reuse of this industrial byproduct. Optimize material properties by adjusting raw material ratios and analyzing adsorption conditions using response surface methodology (RSM). Under optimized conditions (25 °C, pH 5, 200 mg L<sup>−1</sup> initial Pb(II)), PPG@UiO-66 adsorbed Pb(II) with a concentration of 459.59 mg g<sup>−1</sup>. Kinetic and isothermal modeling revealed that the adsorption process obeys pseudo-second-order kinetics, indicative of a chemisorption mechanism. The Langmuir model describes monolayer adsorption on a homogeneous surface. Fixed-bed experiments confirmed PPG@UiO-66's dynamic adsorption uptake of 8.42 mg g<sup>−1</sup> in industrial oil and gas field wastewater. The Thomas (R<sup>2</sup> = 0.991) and Yoon-Nelson (R<sup>2</sup> = 0.963) model validated their highly efficient adsorption capacity and engineering application potential in continuous flow systems. The intrinsic mechanism of adsorption was systematically investigated. This material achieves Pb(II) removal through carboxylate coordination, ion exchange, and lead sulfate precipitation. The adsorbed material causes no secondary pollution, and heavy metal release levels remain below safety thresholds. This study provides a high-performance adsorbent material for treating wastewater from lead-contaminated oil and gas fields, offering significant environmental benefits and practical application value.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125868"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Zero-dimensional perovskite Cs3Cu2I5 crystals exhibit remarkable luminescence and scintillation properties, along with advantages of non-toxicity and low cost, rendering them as promising candidates for optoelectronic applications. The solution method is feasible to grow Cs3Cu2I5 crystals, while high-quality single crystals with minimal defects remains a critical challenge. Herein, a cost-effective and highly efficient antisolvent vapor-assisted crystallization (AVC) technique has been designed to yield centimeter-sized x mol% Na+: Cs3Cu2I5 (x = 0, 2.5, 5, 7.5 and 10) single crystals within four days. The transparent crystals feature distinctive crystalline planes, with good crystallization quality. Particularly, 7.5 mol % Na+:Cs3Cu2I5 exhibited the fewest defects alongside superior overall quality. The full width at half maximum (FWHM) of the X-ray rocking curve for (101) natural crystallographic plane was only 0.016°. The optical transmittance achieved almost 85 % with wavelength approaching 800 nm. The PLQY was enhanced from 78.10 % of pure Cs3Cu2I5 to 87.18 % of 7.5 mol % Na+:Cs3Cu2I5. Under excitation of 22Na γ-rays, the light yield of pure Cs3Cu2I5 and 7.5 mol% Na+:Cs3Cu2I5 were 21639 photons/Mev and 25191 photons/Mev, respectively. Apparently, 7.5 mol% Na+:Cs3Cu2I5 was characterized with increase of approximately 16.4 % in the light yield, while the energy resolution was also improved from 18.0 % for Cs3Cu2I5 to 16.4 % for 7.5 mol% Na+:Cs3Cu2I5, implying its significant potential as excellent scintillation candidate.
{"title":"The growth of high-quality Na: Cs3Cu2I5 single crystals by rapid solution method","authors":"Kaifeng Meng, Hui Shen, Xuntao Zhang, Jian Zhang, Ying Yang, Jie Zhou, Tian Tian, Jiayue Xu","doi":"10.1016/j.jssc.2026.125840","DOIUrl":"10.1016/j.jssc.2026.125840","url":null,"abstract":"<div><div>Zero-dimensional perovskite Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> crystals exhibit remarkable luminescence and scintillation properties, along with advantages of non-toxicity and low cost, rendering them as promising candidates for optoelectronic applications. The solution method is feasible to grow Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> crystals, while high-quality single crystals with minimal defects remains a critical challenge. Herein, a cost-effective and highly efficient antisolvent vapor-assisted crystallization (AVC) technique has been designed to yield centimeter-sized x mol% Na<sup>+</sup>: Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> (x = 0, 2.5, 5, 7.5 and 10) single crystals within four days. The transparent crystals feature distinctive crystalline planes, with good crystallization quality. Particularly, 7.5 mol % Na<sup>+</sup>:Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> exhibited the fewest defects alongside superior overall quality. The full width at half maximum (FWHM) of the X-ray rocking curve for (101) natural crystallographic plane was only 0.016°. The optical transmittance achieved almost 85 % with wavelength approaching 800 nm. The PLQY was enhanced from 78.10 % of pure Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> to 87.18 % of 7.5 mol % Na<sup>+</sup>:Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub>. Under excitation of <sup>22</sup>Na <em>γ</em>-rays, the light yield of pure Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> and 7.5 mol% Na<sup>+</sup>:Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> were 21639 photons/Mev and 25191 photons/Mev, respectively. Apparently, 7.5 mol% Na<sup>+</sup>:Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> was characterized with increase of approximately 16.4 % in the light yield, while the energy resolution was also improved from 18.0 % for Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub> to 16.4 % for 7.5 mol% Na<sup>+</sup>:Cs<sub>3</sub>Cu<sub>2</sub>I<sub>5</sub>, implying its significant potential as excellent scintillation candidate.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125840"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146185664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-19DOI: 10.1016/j.jssc.2026.125841
Qifeng Sun , Jiaxin Zou , Hongbo Liu , Hui Chen
The metal nitrogen-doped carbon catalysts derived from an imidazole zeolite framework have attracted significant attention in the field of oxygen reduction reaction(ORR). In this investigation, a ZIF-67 catalyst is grown epitaxially from a ZIF-8 seed crystal using a simple stirring-resting method, resulting in a ZIF-8@ZIF-67 precursor with a core-shell structure. A Co, N-doped hollow porous carbon catalyst (Co-N-HPC) composed of carbon nanotubes retaining a rhombohedral dodecahedral morphology was obtained through one-step heat treatment. This Co-N-HPC catalyst demonstrates exceptional methanol tolerance and stability, surpassing that of commercial 20 %Pt/C. Remarkably, it achieved a limiting current density of 5.963 mA cm−2, with an onset potential of 1.026 V and a half-wave potential of 0.853 V. When integrated into a rechargeable zinc-air battery, the catalyst enables stable multi-step discharge and reduced polarization. The power density of the battery exceeds that of commercial 20 %Pt/C by approximately 61 %, and it exhibited a cycle charge and discharge time of 248 h.
以咪唑分子筛为骨架的金属氮掺杂碳催化剂在氧还原反应（ORR）领域引起了广泛的关注。在本研究中，采用简单的搅拌-静息法从ZIF-8种子晶体外延生长ZIF-67催化剂，得到具有核-壳结构的ZIF-8@ZIF-67前驱体。通过一步热处理，获得了一种由碳纳米管组成的保持十二面体菱形形貌的Co， n掺杂空心多孔碳催化剂（Co- n - hpc）。这种Co-N-HPC催化剂具有优异的甲醇耐受性和稳定性，超过了20% Pt/C的商用催化剂。其极限电流密度为5.963 mA cm−2，起始电位为1.026 V，半波电位为0.853 V。当集成到一个可充电的锌空气电池，催化剂可以实现稳定的多步放电和减少极化。该电池的功率密度比商用20% Pt/C电池高出约61%，循环充放电时间为248 h。
{"title":"Synthesis of core-shell three-dimensional porous cobalt –nitrogen doped nano-carbon catalysts for enhanced oxygen reduction in Zinc-Air batteries","authors":"Qifeng Sun , Jiaxin Zou , Hongbo Liu , Hui Chen","doi":"10.1016/j.jssc.2026.125841","DOIUrl":"10.1016/j.jssc.2026.125841","url":null,"abstract":"<div><div>The metal nitrogen-doped carbon catalysts derived from an imidazole zeolite framework have attracted significant attention in the field of oxygen reduction reaction(ORR). In this investigation, a ZIF-67 catalyst is grown epitaxially from a ZIF-8 seed crystal using a simple stirring-resting method, resulting in a ZIF-8@ZIF-67 precursor with a core-shell structure. A Co, N-doped hollow porous carbon catalyst (Co-N-HPC) composed of carbon nanotubes retaining a rhombohedral dodecahedral morphology was obtained through one-step heat treatment. This Co-N-HPC catalyst demonstrates exceptional methanol tolerance and stability, surpassing that of commercial 20 %Pt/C. Remarkably, it achieved a limiting current density of 5.963 mA cm<sup>−2</sup>, with an onset potential of 1.026 V and a half-wave potential of 0.853 V. When integrated into a rechargeable zinc-air battery, the catalyst enables stable multi-step discharge and reduced polarization. The power density of the battery exceeds that of commercial 20 %Pt/C by approximately 61 %, and it exhibited a cycle charge and discharge time of 248 h.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125841"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146015878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ce2Co7 single crystals with the hexagonal Ce2Ni7-type structure (space group P63/mmc) were obtained and investigated. Single crystal X-ray diffraction confirmed the hexagonal structure, while no evidence of the rhombohedral Gd2Co7-type modification was found. This compound exhibits antiferromagnetic behavior at temperatures between 5 and 21 K. Above 21 K, this compound becomes a highly anisotropic ferromagnet with a Curie temperature of 50 K. Magnetic measurements along the c-axis determined the critical field for the antiferromagnetic — ferromagnetic phase transition to have a linear dependence on temperature with a slope of −226 Oe/K. A pronounced magnetic susceptibility anomaly was detected in the temperature range of 50–150 K. However, a scaling analysis commonly used to identify a Griffiths phase revealed no evidence for the presence of such a phase.
{"title":"Structural and magnetic properties of Ce2Co7 single crystal","authors":"V.V. Govorina , S.N. Mozgovykh , A.M. Bartashevich , V.S. Gaviko , A.S. Ovchinnikov , M.I. Bartashevich , D.S. Neznakhin","doi":"10.1016/j.jssc.2026.125849","DOIUrl":"10.1016/j.jssc.2026.125849","url":null,"abstract":"<div><div>Ce<sub>2</sub>Co<sub>7</sub> single crystals with the hexagonal Ce<sub>2</sub>Ni<sub>7</sub>-type structure (space group <em>P</em>6<sub>3</sub>/<em>mmc</em>) were obtained and investigated. Single crystal X-ray diffraction confirmed the hexagonal structure, while no evidence of the rhombohedral Gd<sub>2</sub>Co<sub>7</sub>-type modification was found. This compound exhibits antiferromagnetic behavior at temperatures between 5 and 21 K. Above 21 K, this compound becomes a highly anisotropic ferromagnet with a Curie temperature of 50 K. Magnetic measurements along the <em>c</em>-axis determined the critical field for the antiferromagnetic — ferromagnetic phase transition to have a linear dependence on temperature with a slope of −226 Oe/K. A pronounced magnetic susceptibility anomaly was detected in the temperature range of 50–150 K. However, a scaling analysis commonly used to identify a Griffiths phase revealed no evidence for the presence of such a phase.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125849"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146075878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-05-01Epub Date: 2026-01-19DOI: 10.1016/j.jssc.2026.125844
Taeshik Kim , Kwonmin Song , Kwangjoo Kim , Jino Kim , Insub Lee , Hoon Wee , Youngdeog Koh , In Chung
Although polycrystalline SnSe is a promising lead-free thermoelectric material, its performance has remained constrained until recently by low electrical conductivity and unexpectedly higher lattice thermal conductivity compared with single-crystal SnSe. Here, we introduce a hierarchical compositional and structural design strategy that integrates Ge alloying, Na and Ta doping, and a combined post-processing of mechanical ball-milling and H2-reduction purification (BM/H2–R) to address such challenges. Based on the enhanced carrier concentration at ∼1019 cm−3 by Na doping, the Ge substitution at the Sn site slightly decreases hole carrier concentration and suppresses lattice heat transport through mass-fluctuation and strain-field scattering, giving a ZT of ∼1.4 at 800 K. The subsequent Ta doping induces microscale TaSe2 precipitates within the SnSe matrix, facilitating charge carrier transport and introducing additional phonon-scattering centers. The resulting materials exhibit simultaneously increased power factor and decreased thermal conductivity, giving a ZT of ∼1.5 at 800 K. Further microstructural engineering through the BM/H2–R process reduces the particle size of TaSe2 precipitates to a nanoscale and effectively removes surface oxides, markedly suppressing the lattice thermal conductivity, especially at the high temperature regime. The optimized sample exhibits the ultralow lattice thermal conductivity of ∼0.13 W m−1 K−1 and a very high ZT of ∼2.1 at 800 K. These results highlight that simultaneous control of chemical compositions and microstructural hierarchy provides an effective approach to decouple charge and phonon transport, offering a practical pathway for developing high-performance thermoelectric materials.
{"title":"Hierarchical chemical and microstructural engineering for high thermoelectric performance polycrystalline SnSe, triply incorporated with Na, Ge, and Ta atoms","authors":"Taeshik Kim , Kwonmin Song , Kwangjoo Kim , Jino Kim , Insub Lee , Hoon Wee , Youngdeog Koh , In Chung","doi":"10.1016/j.jssc.2026.125844","DOIUrl":"10.1016/j.jssc.2026.125844","url":null,"abstract":"<div><div>Although polycrystalline SnSe is a promising lead-free thermoelectric material, its performance has remained constrained until recently by low electrical conductivity and unexpectedly higher lattice thermal conductivity compared with single-crystal SnSe. Here, we introduce a hierarchical compositional and structural design strategy that integrates Ge alloying, Na and Ta doping, and a combined post-processing of mechanical ball-milling and H<sub>2</sub>-reduction purification (BM/H<sub>2</sub>–R) to address such challenges. Based on the enhanced carrier concentration at ∼10<sup>19</sup> cm<sup>−3</sup> by Na doping, the Ge substitution at the Sn site slightly decreases hole carrier concentration and suppresses lattice heat transport through mass-fluctuation and strain-field scattering, giving a ZT of ∼1.4 at 800 K. The subsequent Ta doping induces microscale TaSe<sub>2</sub> precipitates within the SnSe matrix, facilitating charge carrier transport and introducing additional phonon-scattering centers. The resulting materials exhibit simultaneously increased power factor and decreased thermal conductivity, giving a ZT of ∼1.5 at 800 K. Further microstructural engineering through the BM/H<sub>2</sub>–R process reduces the particle size of TaSe<sub>2</sub> precipitates to a nanoscale and effectively removes surface oxides, markedly suppressing the lattice thermal conductivity, especially at the high temperature regime. The optimized sample exhibits the ultralow lattice thermal conductivity of ∼0.13 W m<sup>−1</sup> K<sup>−1</sup> and a very high ZT of ∼2.1 at 800 K. These results highlight that simultaneous control of chemical compositions and microstructural hierarchy provides an effective approach to decouple charge and phonon transport, offering a practical pathway for developing high-performance thermoelectric materials.</div></div>","PeriodicalId":378,"journal":{"name":"Journal of Solid State Chemistry","volume":"357 ","pages":"Article 125844"},"PeriodicalIF":3.5,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146037427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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