Pub Date : 2025-12-02DOI: 10.1007/s10562-025-05253-9
Balaga Viswanadham, Jhansi Pedada, V. D. B. C. Dasireddy
A copper tuned phosphotungstic acid (Cu-PTA) supported on TiO2 catalyst is found to be highly stable, active and chemo-selective dehydration of glycerol to acrolein during gas phase under atmospheric pressure. A range of catalysts was produced by adjusting the active phase of Cu-PTA loadings between 10 and 40 wt% on the titania support. The characterization data provides information of Keggin ion structure was maintained even after higher active phase loading and moderate acidity inclined with loadings. FT-IR spectra results suggest, Keggin ion was retained after regeneration of catalyst. The catalytic properties are affected by active phase Cu-PTA loading, calcination temperature, reaction temperature, glycerol concentration, time on stream and regeneration studies. The overall optimized catalysts, 30 wt% catalyst possess higher amount moderate acidic sites and total acidity results 87% acrolein selectivity with 98% glycerol conversion at 325 °C in atmospheric pressure. The regenerated catalyst exhibits similar catalytic performance compared to fresh catalyst is because of minimal change in acidity of catalyst after regeneration.
Graphical Abstract
Scheme 1: Glycerol to acrolein over Cu1.5PW12O40 / TiO2 catalyst.
{"title":"The Role of Bi-functional Copper Boasted Phosphotungstic Acid Catalysts Supported on Titania for Dehydration of Glycerol","authors":"Balaga Viswanadham, Jhansi Pedada, V. D. B. C. Dasireddy","doi":"10.1007/s10562-025-05253-9","DOIUrl":"10.1007/s10562-025-05253-9","url":null,"abstract":"<div><p>A copper tuned phosphotungstic acid (Cu-PTA) supported on TiO<sub>2</sub> catalyst is found to be highly stable, active and chemo-selective dehydration of glycerol to acrolein during gas phase under atmospheric pressure. A range of catalysts was produced by adjusting the active phase of Cu-PTA loadings between 10 and 40 wt% on the titania support. The characterization data provides information of Keggin ion structure was maintained even after higher active phase loading and moderate acidity inclined with loadings. FT-IR spectra results suggest, Keggin ion was retained after regeneration of catalyst. The catalytic properties are affected by active phase Cu-PTA loading, calcination temperature, reaction temperature, glycerol concentration, time on stream and regeneration studies. The overall optimized catalysts, 30 wt% catalyst possess higher amount moderate acidic sites and total acidity results 87% acrolein selectivity with 98% glycerol conversion at 325 °C in atmospheric pressure. The regenerated catalyst exhibits similar catalytic performance compared to fresh catalyst is because of minimal change in acidity of catalyst after regeneration.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div><div><p>Scheme 1: Glycerol to acrolein over Cu1.5PW12O40 / TiO2 catalyst.</p></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"156 1","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145646234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01DOI: 10.1007/s10562-025-05245-9
Chang-Jun Lee, Cheol-Hwi Ryu, Gab-Jin Hwang
A NiO-CeO2 catalyst pellet was developed for application in the low-temperature water-gas shift reaction (LT-WGSR) to facilitate hydrogen production from syngas derived from waste plastic gasification. The NiO-CeO2 catalyst powder was synthesized via a co-precipitation method and subsequently formed into pellets through compression molding. LT-WGSR performance was evaluated at CO:H2O feed ratios of 1:2 –1:4 and operating temperatures of 180–220 ℃ under a gas hourly space velocity of 10,000 h-1. The highest CO conversion (85–90%) was achieved at 200 ℃ with a CO:H2O ratio of 1:2, while the maximum H2 selectivity (1.59–3.04) was obtained at 220 ℃ with a CO:H2O ratio of 1:3. These findings highlight the excellent low-temperature activity and hydrogen selectivity of NiO-CeO2 catalyst pellets, underscoring their potential as efficient catalysts for sustainable hydrogen production.
{"title":"Catalytic Performance of the NiO-CeO2 Pellets in the Low-Temperature Water-Gas Shift Reaction","authors":"Chang-Jun Lee, Cheol-Hwi Ryu, Gab-Jin Hwang","doi":"10.1007/s10562-025-05245-9","DOIUrl":"10.1007/s10562-025-05245-9","url":null,"abstract":"<div><p>A NiO-CeO<sub>2</sub> catalyst pellet was developed for application in the low-temperature water-gas shift reaction (LT-WGSR) to facilitate hydrogen production from syngas derived from waste plastic gasification. The NiO-CeO<sub>2</sub> catalyst powder was synthesized via a co-precipitation method and subsequently formed into pellets through compression molding. LT-WGSR performance was evaluated at CO:H<sub>2</sub>O feed ratios of 1:2 –1:4 and operating temperatures of 180–220 ℃ under a gas hourly space velocity of 10,000 h<sup>-1</sup>. The highest CO conversion (85–90%) was achieved at 200 ℃ with a CO:H<sub>2</sub>O ratio of 1:2, while the maximum H<sub>2</sub> selectivity (1.59–3.04) was obtained at 220 ℃ with a CO:H<sub>2</sub>O ratio of 1:3. These findings highlight the excellent low-temperature activity and hydrogen selectivity of NiO-CeO<sub>2</sub> catalyst pellets, underscoring their potential as efficient catalysts for sustainable hydrogen production.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><img></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We explore an efficient methodology for hydrogenation and dehydrogenation of N-heteroaryl compounds as hydrogen energy transport and storage using Pd/C catalysts. Pd/C catalyst was used for hydrogenation and dehydrogenation of various types of N-heterocyclic compounds. The hydrogenation reaction was also investigated at different temperatures and at different pressures. The complete hydrogenation of quinoline (7.1 wt% hydrogen storage capacity) was achieved at 200 °C and 5 MPa hydrogen pressure within 12 h. The dehydrogenation of decahydroquinoline (DHQ) (6.7 wt% hydrogen release capacity) was achieved at 250 °C temperature. The hydrogen adsorption and releasing capacity reported herein is highest as compared to reported in the literature. We also calculated mole heat and electricity consumption for the reaction. Present methodology, therefore, promises in future, the hydrogen generation, storage, and transport application of LOHC.
{"title":"Reversible Hydrogenation and Dehydrogenation of N-Heteroaryl with Heterogeneous Palladium Catalyst for Hydrogen Storage and Transport Application","authors":"Amardipsing Girase, Chandrakant Nichinde, Baliram Patil, Suryakant Chaudhari, Anil Kinage","doi":"10.1007/s10562-025-05233-z","DOIUrl":"10.1007/s10562-025-05233-z","url":null,"abstract":"<div><p>We explore an efficient methodology for hydrogenation and dehydrogenation of N-heteroaryl compounds as hydrogen energy transport and storage using Pd/C catalysts. Pd/C catalyst was used for hydrogenation and dehydrogenation of various types of N-heterocyclic compounds. The hydrogenation reaction was also investigated at different temperatures and at different pressures. The complete hydrogenation of quinoline (7.1 wt% hydrogen storage capacity) was achieved at 200 °C and 5 MPa hydrogen pressure within 12 h. The dehydrogenation of decahydroquinoline (DHQ) (6.7 wt% hydrogen release capacity) was achieved at 250 °C temperature. The hydrogen adsorption and releasing capacity reported herein is highest as compared to reported in the literature. We also calculated mole heat and electricity consumption for the reaction. Present methodology, therefore, promises in future, the hydrogen generation, storage, and transport application of LOHC.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigates the structural and optical properties of titanium dioxide (TiO₂) thin films synthesized via the sol–gel spin-coating technique at varying spin speeds. Unlike the conventional power-law relationship between film thickness and spin speed in sol–gel spin coating. These results exhibited a shifted exponential decay described by (dleft(omega right)= {d}_{infty }+{A}_{0}{e}^{-komega }). X-ray diffraction (XRD) analysis confirmed the formation of the anatase phase with a preferred orientation along the (101) plane. The crystallite size increased with spin speed, reaching a maximum of 20 nm at 4000 rpm before decreasing at higher speeds. Raman spectroscopy revealed characteristic anatase peaks at 144 cm⁻1 and 639 cm⁻1, corresponding to O–Ti–O vibrational modes, while Fourier-transform infrared (FT-IR) spectroscopy confirmed the presence of strong Ti–O bonding. Optical measurements showed high transmittance exceeding 90%, and the minimum optical band gap of 3.49 eV was recorded at 4000 rpm. Photoluminescence (PL) spectra exhibited emission peaks at 460 nm, 480 nm, and 525 nm, attributed to oxygen vacancies and Ti4⁺ ions, indicating the presence of defect-related energy states that enhance photocatalytic activity. The photocatalytic performance, assessed through the degradation of methylene blue, showed a peak degradation efficiency of 84% at 4000 rpm, followed by a decline at higher spin speeds. The enhanced degradation is attributed to the increased density of oxygen vacancies and active Ti4⁺ sites. These findings highlight the critical role of spin speed in tailoring the structural and functional properties of TiO₂ thin films for optimized photocatalytic applications.
Graphical Abstract
研究了溶胶-凝胶自旋镀膜技术在不同自旋速度下合成的二氧化钛（TiO 2）薄膜的结构和光学性能。与传统的溶胶-凝胶自旋涂层中膜厚与自旋速度的幂律关系不同。这些结果显示了由(dleft(omega right)= {d}_{infty }+{A}_{0}{e}^{-komega })描述的移位指数衰减。x射线衍射（XRD）分析证实形成了沿（101）面优先取向的锐钛矿相。晶粒尺寸随着转速的增加而增大，在转速为4000 rpm时晶粒尺寸最大可达20 nm，转速越高晶粒尺寸越小。拉曼光谱揭示了144 cm - 1和639 cm - 1的锐钛矿特征峰，对应于O-Ti-O振动模式，而傅里叶变换红外（FT-IR）光谱证实了强Ti-O键的存在。光学测量显示高透光率超过90%, and the minimum optical band gap of 3.49 eV was recorded at 4000 rpm. Photoluminescence (PL) spectra exhibited emission peaks at 460 nm, 480 nm, and 525 nm, attributed to oxygen vacancies and Ti4⁺ ions, indicating the presence of defect-related energy states that enhance photocatalytic activity. The photocatalytic performance, assessed through the degradation of methylene blue, showed a peak degradation efficiency of 84% at 4000 rpm, followed by a decline at higher spin speeds. The enhanced degradation is attributed to the increased density of oxygen vacancies and active Ti4⁺ sites. These findings highlight the critical role of spin speed in tailoring the structural and functional properties of TiO₂ thin films for optimized photocatalytic applications.Graphical Abstract
{"title":"Effect of Rotation Speed on the Structural, Optical Properties and Photocatalytic Kinetics of TiO2 Thin Films Synthesized by Sol–Gel Method","authors":"Radhia Messemeche, Youcef Benkhetta, Hanane Saidi, Abdallah Attaf, Zahia Bencharef, Mohamed Salah Aida","doi":"10.1007/s10562-025-05252-w","DOIUrl":"10.1007/s10562-025-05252-w","url":null,"abstract":"<div><p>This study investigates the structural and optical properties of titanium dioxide (TiO₂) thin films synthesized via the sol–gel spin-coating technique at varying spin speeds. Unlike the conventional power-law relationship between film thickness and spin speed in sol–gel spin coating. These results exhibited a shifted exponential decay described by <span>(dleft(omega right)= {d}_{infty }+{A}_{0}{e}^{-komega })</span>. X-ray diffraction (XRD) analysis confirmed the formation of the anatase phase with a preferred orientation along the (101) plane. The crystallite size increased with spin speed, reaching a maximum of 20 nm at 4000 rpm before decreasing at higher speeds. Raman spectroscopy revealed characteristic anatase peaks at 144 cm⁻<sup>1</sup> and 639 cm⁻<sup>1</sup>, corresponding to O–Ti–O vibrational modes, while Fourier-transform infrared (FT-IR) spectroscopy confirmed the presence of strong Ti–O bonding. Optical measurements showed high transmittance exceeding 90%, and the minimum optical band gap of 3.49 eV was recorded at 4000 rpm. Photoluminescence (PL) spectra exhibited emission peaks at 460 nm, 480 nm, and 525 nm, attributed to oxygen vacancies and Ti<sup>4</sup>⁺ ions, indicating the presence of defect-related energy states that enhance photocatalytic activity. The photocatalytic performance, assessed through the degradation of methylene blue, showed a peak degradation efficiency of 84% at 4000 rpm, followed by a decline at higher spin speeds. The enhanced degradation is attributed to the increased density of oxygen vacancies and active Ti<sup>4</sup>⁺ sites. These findings highlight the critical role of spin speed in tailoring the structural and functional properties of TiO₂ thin films for optimized photocatalytic applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Retraction Note: Introduction of a Recyclable Basic Ionic Solvent with Bis-(NHC) Ligand Property and the Possibility of Immobilization on Magnetite for Ligand- and Base-Free Pd-Catalyzed Heck, Suzuki and Sonogashira Cross-Coupling Reactions in Water","authors":"Qingwang Min, Penghua Miao, Deyu Chu, Jinghan Liu, Meijuan Qi, Milad Kazemnejadi","doi":"10.1007/s10562-025-05246-8","DOIUrl":"10.1007/s10562-025-05246-8","url":null,"abstract":"","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01DOI: 10.1007/s10562-025-05250-y
Guangxiang Wang, Lu Gao, Xiaoqiang Zhang, Shuo Li
Alkylate gasoline, produced via alkylation processes as a high-octane component, supports cleaner energy objectives and environmental impact reduction strategies. Strengthening the catalytic durability of solid acid catalysts in alkylation process is an urgent challenge to be addressed. Herein, a surface modified strategy was proposed to enhance the catalytic durability of H-Beta zeolite. Octadecyltrichlorosilane was utilized to enhance hydrophobicity without significantly reducing the acid density. It is found that the catalytic stability of appropriate hydrophobic zeolite has increased by 37%, compared to the unmodified zeolite. Results from adsorption energy analysis indicate that rational hydrophobic modification of the external surface serves to increase the ratio of isobutane and butene in the channel, which consequently enhances the stability of catalyst. Meanwhile, excessive silanization modification will result in the decrease of catalytic stability due to the pore mouth blockage. The findings of this work provide an innovative strategy to enhances catalytic durability of solid acid catalysts in C4 alkylation process.
{"title":"A Novel Strategy to Enhancing Catalytic Stability of H-Beta Zeolite in Alkylate Gasoline Production","authors":"Guangxiang Wang, Lu Gao, Xiaoqiang Zhang, Shuo Li","doi":"10.1007/s10562-025-05250-y","DOIUrl":"10.1007/s10562-025-05250-y","url":null,"abstract":"<div><p>Alkylate gasoline, produced via alkylation processes as a high-octane component, supports cleaner energy objectives and environmental impact reduction strategies. Strengthening the catalytic durability of solid acid catalysts in alkylation process is an urgent challenge to be addressed. Herein, a surface modified strategy was proposed to enhance the catalytic durability of H-Beta zeolite. Octadecyltrichlorosilane was utilized to enhance hydrophobicity without significantly reducing the acid density. It is found that the catalytic stability of appropriate hydrophobic zeolite has increased by 37%, compared to the unmodified zeolite. Results from adsorption energy analysis indicate that rational hydrophobic modification of the external surface serves to increase the ratio of isobutane and butene in the channel, which consequently enhances the stability of catalyst. Meanwhile, excessive silanization modification will result in the decrease of catalytic stability due to the pore mouth blockage. The findings of this work provide an innovative strategy to enhances catalytic durability of solid acid catalysts in C4 alkylation process.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145675319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The hydrogenation of benzene is a key reaction in industry, and binary alloys are promising candidates for improving the catalytic efficiency of this process. In this study, the adsorption energies of benzene and hydrogen over random 150 alloys are determined using density functional theory (DFT) calculation, and varied physical properties of alloys are used as descriptors. Four machine learning (ML) models, light gradient boosting machine (LGBM), extreme gradient boosting (XGBT), multilayer perceptron (MLP) and support vector machine (SVM) are employed to predict the adsorption energies. After feature selection and parameter optimization, LGBM model shows the highest prediction accuracy, with correlation coefficient (R2) and root mean square error (RMSE) of 0.813 and 0.415 eV for benzene, as well as 0.874 and 0.176 eV for hydrogen. Therefore, LGBM model is selected to predict the adsorption energies of benzene and hydrogen (ΔEB and ΔEH), and Cu2Ni2 has excellent ΔEB and ΔEH of -4.97 and − 1.81 eV.
{"title":"Application of Machine Learning in High-throughput Screening of Binary Alloys for the Hydrogenation of Benzene","authors":"Zhili Chang, Guangquan Li, Wenjun Cai, Haolan Liu, Guangcheng Zhang, Weitao Ou","doi":"10.1007/s10562-025-05227-x","DOIUrl":"10.1007/s10562-025-05227-x","url":null,"abstract":"<div><p>The hydrogenation of benzene is a key reaction in industry, and binary alloys are promising candidates for improving the catalytic efficiency of this process. In this study, the adsorption energies of benzene and hydrogen over random 150 alloys are determined using density functional theory (DFT) calculation, and varied physical properties of alloys are used as descriptors. Four machine learning (ML) models, light gradient boosting machine (LGBM), extreme gradient boosting (XGBT), multilayer perceptron (MLP) and support vector machine (SVM) are employed to predict the adsorption energies. After feature selection and parameter optimization, LGBM model shows the highest prediction accuracy, with correlation coefficient (R<sup>2</sup>) and root mean square error (RMSE) of 0.813 and 0.415 eV for benzene, as well as 0.874 and 0.176 eV for hydrogen. Therefore, LGBM model is selected to predict the adsorption energies of benzene and hydrogen (ΔE<sub><i>B</i></sub> and ΔE<sub><i>H</i></sub>), and Cu<sub><i>2</i></sub>Ni<sub><i>2</i></sub> has excellent ΔE<sub><i>B</i></sub> and ΔE<sub><i>H</i></sub> of -4.97 and − 1.81 eV.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study reports the synthesis and characterization of CuO–NiO–ZnO trimetallic oxide nanocomposite aimed at refining functional performance. The composites were synthesized using a simple co-precipitation technique at two different temperatures: 200℃ and 500 °C, and they were subsequently characterized by UV-visible spectroscopy, X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Dynamic Light Scattering (DLS), and Scanning Electron Microscopy (SEM). Optical analysis using a Tauc plot revealed that the materials had a band gap of 2.70 eV and 2.67 eV for the 200 °C and 500 °C samples, respectively. Furthermore, XRD analysis confirmed the presence of distinct CuO, NiO, and ZnO phases, with the NiO phase comprising the maximum volume fraction. The successful formation of trimetallic oxide nanocomposites was found to have an impact on the overall properties of the nanocomposites. Additionally, SEM images revealed that the materials consisted of nanoparticles with irregular shapes. Notably, the nanocomposites exhibited selective antibacterial activity. Specifically, the 200 °C sample was effective against Gram-negative bacteria (Pseudomonas, E. coli) (GNB), whereas the 500 °C sample demonstrated efficacy against Gram-positive bacteria (GPB) (Bacillus) and also for Gram–negative (E. coli) bacterial strains, with activity increasing with an increase in nanocomposite concentration. These findings collectively highlight that synthesis temperature is a crucial parameter for tuning the structural and functional properties of these nanocomposites for specific applications.
{"title":"Antibacterial Application of Heterogeneous CuO–NiO–ZnO Metal Oxides Nanocomposites","authors":"Vikas Choudhary, Kusham Lata, Manish Kumar, Ajay Sharma, Raman Kumar, Vivek Sheel Jaswal","doi":"10.1007/s10562-025-05218-y","DOIUrl":"10.1007/s10562-025-05218-y","url":null,"abstract":"<div><p>This study reports the synthesis and characterization of CuO–NiO–ZnO trimetallic oxide nanocomposite aimed at refining functional performance. The composites were synthesized using a simple co-precipitation technique at two different temperatures: 200℃ and 500 °C, and they were subsequently characterized by UV-visible spectroscopy, X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Dynamic Light Scattering (DLS), and Scanning Electron Microscopy (SEM). Optical analysis using a Tauc plot revealed that the materials had a band gap of 2.70 eV and 2.67 eV for the 200 °C and 500 °C samples, respectively. Furthermore, XRD analysis confirmed the presence of distinct CuO, NiO, and ZnO phases, with the NiO phase comprising the maximum volume fraction. The successful formation of trimetallic oxide nanocomposites was found to have an impact on the overall properties of the nanocomposites. Additionally, SEM images revealed that the materials consisted of nanoparticles with irregular shapes. Notably, the nanocomposites exhibited selective antibacterial activity. Specifically, the 200 °C sample was effective against Gram-negative bacteria (<i>Pseudomonas</i>, <i>E. coli</i>) (GNB), whereas the 500 °C sample demonstrated efficacy against Gram-positive bacteria (GPB) (<i>Bacillus</i>) and also for Gram–negative (<i>E. coli)</i> bacterial strains, with activity increasing with an increase in nanocomposite concentration. These findings collectively highlight that synthesis temperature is a crucial parameter for tuning the structural and functional properties of these nanocomposites for specific applications.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145560928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-16DOI: 10.1007/s10562-025-05196-1
Eric I. Altman, Hans-Joachim Freund, Detlef W. Bahnemann, Bruno Chaudret, Alison R. Fout, Andrew J. Gellman, Thomas R. Ward, Francisco Zaera, Paul Cremer, Peidong Yang, Ji Su
{"title":"In Memory of Gabor Somorjai (1935–2025)","authors":"Eric I. Altman, Hans-Joachim Freund, Detlef W. Bahnemann, Bruno Chaudret, Alison R. Fout, Andrew J. Gellman, Thomas R. Ward, Francisco Zaera, Paul Cremer, Peidong Yang, Ji Su","doi":"10.1007/s10562-025-05196-1","DOIUrl":"10.1007/s10562-025-05196-1","url":null,"abstract":"","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Cathode catalysts are vital for proton exchange membrane fuel cells (PEMFCs). However, the sluggish Oxygen reduction reaction (ORR) kinetics and the high cost of platinum-based catalysts collectively pose significant barriers to the large-scale commercialization of PEMFCs. To address these issues, a Pt–Pd–Cu ultrathin nanosheet was prepared with a thickness of about 1.626 nm through chemical synthesis and the substitution method. The synthesis, which involves chemical reduction of Pt precursors followed by directional deposition on the Pd–Cu layer, produces Pt3Pd33Cu64 catalysts with a composite structure that exhibits structural stability and enhanced catalytic performance. Electrochemical tests reveal that the as-synthesized Pt3Pd33Cu64 ultrathin nanosheets show the mass activity (MA) of 1.59 A mg−1Pt+Pd, and the specific activity (SA) of 0.422 mA cm−2. These performances show 4.42-fold and 1.66-fold enhancements over commercial Pt/C catalysts (MA: 0.36 A mg−1Pt+Pd, SA:0.255 mA cm−2), respectively. The results demonstrate that the ultrathin nanosheet-structured catalyst enhances catalytic activity, offering a strategy for the design of advanced cathode catalysts.
Graphical Abstract
阴极催化剂是质子交换膜燃料电池（pemfc）的重要组成部分。然而，缓慢的氧还原反应（ORR）动力学和铂基催化剂的高成本共同构成了pemfc大规模商业化的重大障碍。为了解决这些问题，通过化学合成和取代法制备了厚度约为1.626 nm的Pt-Pd-Cu超薄纳米片。该合成方法通过化学还原Pt前驱体，然后在Pd-Cu层上定向沉积，制备出具有复合结构的Pt3Pd33Cu64催化剂，该催化剂具有结构稳定和催化性能增强的特点。电化学测试表明，合成的Pt3Pd33Cu64超薄纳米片的质量活性（MA）为1.59 A mg - 1Pt+Pd，比活性（SA）为0.422 MA cm - 2。这些性能分别比商用Pt/C催化剂（MA: 0.36 A mg - 1Pt+Pd, SA:0.255 MA cm - 2）提高了4.42倍和1.66倍。结果表明，超薄纳米片结构的催化剂提高了催化活性，为先进阴极催化剂的设计提供了策略。图形抽象
{"title":"Ultrathin Porous PtPdCu Nanosheets as Efficient Electrocatalysts for Oxygen Reduction Reaction","authors":"Yaru Li, Jianglong Cheng, Quan Wang, Hongbin Wang, Haipeng Hou, Yumeng Zhu, Jiamin Sun, Miaoling Shi, Xue Zhang","doi":"10.1007/s10562-025-05232-0","DOIUrl":"10.1007/s10562-025-05232-0","url":null,"abstract":"<div><p>Cathode catalysts are vital for proton exchange membrane fuel cells (PEMFCs). However, the sluggish Oxygen reduction reaction (ORR) kinetics and the high cost of platinum-based catalysts collectively pose significant barriers to the large-scale commercialization of PEMFCs. To address these issues, a Pt–Pd–Cu ultrathin nanosheet was prepared with a thickness of about 1.626 nm through chemical synthesis and the substitution method. The synthesis, which involves chemical reduction of Pt precursors followed by directional deposition on the Pd–Cu layer, produces Pt<sub>3</sub>Pd<sub>33</sub>Cu<sub>64</sub> catalysts with a composite structure that exhibits structural stability and enhanced catalytic performance. Electrochemical tests reveal that the as-synthesized Pt<sub>3</sub>Pd<sub>33</sub>Cu<sub>64</sub> ultrathin nanosheets show the mass activity (MA) of 1.59 A mg<sup>−1</sup><sub>Pt+Pd</sub>, and the specific activity (SA) of 0.422 mA cm<sup>−2</sup>. These performances show 4.42-fold and 1.66-fold enhancements over commercial Pt/C catalysts (MA: 0.36 A mg<sup>−1</sup><sub>Pt+Pd</sub>, SA:0.255 mA cm<sup>−2</sup>), respectively. The results demonstrate that the ultrathin nanosheet-structured catalyst enhances catalytic activity, offering a strategy for the design of advanced cathode catalysts.</p><h3>Graphical Abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":508,"journal":{"name":"Catalysis Letters","volume":"155 12","pages":""},"PeriodicalIF":2.3,"publicationDate":"2025-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145561415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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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