Pub Date : 2025-04-06DOI: 10.1016/j.apsusc.2025.163130
Xiaoxi Guo, Zhuoyan Liu, Jiajia Lan, Hongyang Wu, Yi-Fan Han
In heterogeneous Fenton catalysis, the modification of electronic structures at active sites is crucial for enhancing degradation efficiency. This strategy enhances the activation of H2O2 and the subsequent generation of hydroxyl radicals (·OH). However, the effectiveness of these processes is often limited by suboptimal coordination environments at the active sites. In this study, we synthesized a series of MAl2O4 (M=Co and/or Cu) catalysts with spinel structures, specifically tailored for the efficient degradation of chloramphenicol (CAP). We modulated the electronic structure at the active sites by strategically incorporating Cu atoms, controlling the doping concentration to boost the surface enrichment of Cu-embedded CoO6 on CoAl2O4, thus optimizing catalyst performance. This alteration promotes Cu–O-Co interactions within the MO6 environment, enhancing the reducibility of Cu atoms and boosting electron donation and transfer during reactions. This improvement leads to more effective adsorption of H2O2 and enhanced desorption of hydroxyl radicals, coupled with improved regeneration of active sites. The optimized Co7.5Cu2.5/Al2O3 catalyst achieved a remarkable 95.5 % conversion rate of chloramphenicol, demonstrating its potential as an effective solution for treating persistent organic pollutants.
{"title":"Co-Cu-Al-Ox for chloramphenicol degradation: Modification of CoOx coordination and electronic environment by Cu incorporation","authors":"Xiaoxi Guo, Zhuoyan Liu, Jiajia Lan, Hongyang Wu, Yi-Fan Han","doi":"10.1016/j.apsusc.2025.163130","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163130","url":null,"abstract":"In heterogeneous Fenton catalysis, the modification of electronic structures at active sites is crucial for enhancing degradation efficiency. This strategy enhances the activation of H<sub>2</sub>O<sub>2</sub> and the subsequent generation of hydroxyl radicals (·OH). However, the effectiveness of these processes is often limited by suboptimal coordination environments at the active sites. In this study, we synthesized a series of MAl<sub>2</sub>O<sub>4</sub> (M=Co and/or Cu) catalysts with spinel structures, specifically tailored for the efficient degradation of chloramphenicol (CAP). We modulated the electronic structure at the active sites by strategically incorporating Cu atoms, controlling the doping concentration to boost the surface enrichment of Cu-embedded CoO<sub>6</sub> on CoAl<sub>2</sub>O<sub>4</sub>, thus optimizing catalyst performance. This alteration promotes Cu–O-Co interactions within the MO<sub>6</sub> environment, enhancing the reducibility of Cu atoms and boosting electron donation and transfer during reactions. This improvement leads to more effective adsorption of H<sub>2</sub>O<sub>2</sub> and enhanced desorption of hydroxyl radicals, coupled with improved regeneration of active sites. The optimized Co<sub>7.5</sub>Cu<sub>2.5</sub>/Al<sub>2</sub>O<sub>3</sub> catalyst achieved a remarkable 95.5 % conversion rate of chloramphenicol, demonstrating its potential as an effective solution for treating persistent organic pollutants.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"6 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784805","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-06DOI: 10.1016/j.apsusc.2025.163184
Qiushi Cheng, Jiayu Chen, Chenzheng Yue, Kai Yu, Guang Yang, Huiying Mu, Wei Su, Yingjuan Hao, Ning Lin, Fatang Li
The advancement of lithium-ion batteries with high power density at low temperature is limited by sluggish Li+ diffusion kinetics and exacerbated polarization effects. Herein, MoNb12-xVxO33 with abundant dislocations is constructed by a hetero-atom doping strategy, demonstrating enhanced fast rechargeability and low-temperature kinetics. The presence of dislocations in MoNb12-xVxO33 lattice has been confirmed using transmission electron microscope, inverse fast Fourier transform and geometrical phase analysis. The dislocation-rich structure enables a reduction in Li+ desolvation barrier, lowers Li+ site energy and enhances Li+ diffusion capability, particularly at low temperature. The boosted ion diffusion and electronic transport have been established through multiple kinetic analyses and theoretical calculations. Furthermore, the introduced dislocations facilitate stress relief and maintain structural stability during rapid (de)lithiation procedures. Consequently, MoNb12-xVxO33 displays a high reversible capacity of 116.8 mAh g−1 at 100C. Particularly at −20 °C, MoNb12-xVxO33 demonstrates exceptional long-term cycling stability exceeding 7000 cycles at 5C with 98.9 % capacity retention.
{"title":"Dislocation-engineered MoNb12-xVxO33 for ultra-fast and stable lithium storage at low temperature","authors":"Qiushi Cheng, Jiayu Chen, Chenzheng Yue, Kai Yu, Guang Yang, Huiying Mu, Wei Su, Yingjuan Hao, Ning Lin, Fatang Li","doi":"10.1016/j.apsusc.2025.163184","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163184","url":null,"abstract":"The advancement of lithium-ion batteries with high power density at low temperature is limited by sluggish Li<sup>+</sup> diffusion kinetics and exacerbated polarization effects. Herein, MoNb<sub>12-x</sub>V<sub>x</sub>O<sub>33</sub> with abundant dislocations is constructed by a hetero-atom doping strategy, demonstrating enhanced fast rechargeability and low-temperature kinetics. The presence of dislocations in MoNb<sub>12-x</sub>V<sub>x</sub>O<sub>33</sub> lattice has been confirmed using transmission electron microscope, inverse fast Fourier transform and geometrical phase analysis. The dislocation-rich structure enables a reduction in Li<sup>+</sup> desolvation barrier, lowers Li<sup>+</sup> site energy and enhances Li<sup>+</sup> diffusion capability, particularly at low temperature. The boosted ion diffusion and electronic transport have been established through multiple kinetic analyses and theoretical calculations. Furthermore, the introduced dislocations facilitate stress relief<!-- --> <!-- -->and maintain structural stability during rapid (de)lithiation procedures. Consequently, MoNb<sub>12-x</sub>V<sub>x</sub>O<sub>33</sub> displays a high reversible capacity of 116.8 mAh g<sup>−1</sup> at 100C. Particularly at −20 °C, MoNb<sub>12-x</sub>V<sub>x</sub>O<sub>33</sub> demonstrates exceptional long-term cycling stability exceeding 7000 cycles at 5C with 98.9 % capacity retention.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"37 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Metal nanofilms and their dewetting behaviors are widely investigated due to the applications in science and industry. However, the random rupture in dewetting process makes it difficult to compare between experimental and simulational results, and further clarify the mechanism. Hence, we focus on the discontinuous metal films which can achieve controllable rupture in the dewetting process. Anodic aluminum oxide (AAO) is selected as the substrate to create nanopore-structured silver film to investigate the dewetting mechanisms of discontinuous metal nanofilms under different conditions. The impact of three specific annealing factors on the dewetting process is validated through experiments involving the sputtering of silver nanofilms on AAO surfaces. Furthermore, we propose dimension analysis to make a comparison between experimental and simulated data, which verifies the accuracy of existing molecular dynamics model in the dewetting behavior of discontinous metal nanofilm.
{"title":"Molecular dynamics and experimental study of the dewetting behaviors of discontinuous metal films","authors":"Ziyi Cheng, Xiao Wu, Yudong Zhang, Wei Peng, Mingfu Zhu, Ming Zhai, Shijiao Li, Rui Xi, Yifan Hu, Ronghan Wei","doi":"10.1016/j.apsusc.2025.163181","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163181","url":null,"abstract":"Metal nanofilms and their dewetting behaviors are widely investigated due to the applications in science and industry. However, the random rupture in dewetting process makes it difficult to compare between experimental and simulational results, and further clarify the mechanism. Hence, we focus on the discontinuous metal films which can achieve controllable rupture in the dewetting process. Anodic aluminum oxide (AAO) is selected as the substrate to create nanopore-structured silver film to investigate the dewetting mechanisms of discontinuous metal nanofilms under different conditions. The impact of three specific annealing factors on the dewetting process is validated through experiments involving the sputtering of silver nanofilms on AAO surfaces. Furthermore, we propose dimension analysis to make a comparison between experimental and simulated data, which verifies the accuracy of existing molecular dynamics model in the dewetting behavior of discontinous metal nanofilm.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"34 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-05DOI: 10.1016/j.apsusc.2025.163182
Xuhai Pan, Qingwan Xie, Dali Wu, Chenggong Zhang, Xiaowei Zang, Min Hua, Juncheng Jiang
In this paper, monoclinic phase MoO3(β-MoO3) was successfully prepared by a low-cost, additive-free one-step hydrothermal synthesis method and evaluated for the first time for its performance in hydrogen gasochromic. The research results show that, under room temperature conditions, the monoclinal MoO3(β-MoO3) doped with the precious metal Pd exhibits a faster response time and higher contrast in a hydrogen gas environment., with a color change visible to the naked eye occurring in 10 s at 1 % H2 concentration, from white to blue-black. Compared to Pd/α-MoO3 it shows superior gas sensing performance. Through the analysis of the relationship between the material’s structure and performance, the higher density of Lewis acid sites (Mo6+) on the surface of β-MoO3, its lower bandgap energy, and the synergistic effect of its own structure result in a higher content of Mo5+ formed during the color change process. Therefore, the reaction rate of β-MoO3-based materials is faster, and the color contrast after coloring is more pronounced. These findings provide an important experimental basis for applying monoclinic MoO3 as a hydrogen sensing material, demonstrating its potential for future environmental monitoring and safety detection. A new perspective on the field of MoO3-based high-performance hydrogen gasochromic sensors.
{"title":"Fast response and high contrast of monoclinic MoO3-based hydrogen gasochromic sensor","authors":"Xuhai Pan, Qingwan Xie, Dali Wu, Chenggong Zhang, Xiaowei Zang, Min Hua, Juncheng Jiang","doi":"10.1016/j.apsusc.2025.163182","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163182","url":null,"abstract":"In this paper, monoclinic phase MoO<sub>3</sub>(β-MoO<sub>3</sub>) was successfully prepared by a low-cost, additive-free one-step hydrothermal synthesis method and evaluated for the first time for its performance in hydrogen gasochromic. The research results show that, under room temperature conditions, the monoclinal MoO<sub>3</sub>(β-MoO<sub>3</sub>) doped with the precious metal Pd exhibits a faster response time and higher contrast in a hydrogen gas environment., with a color change visible to the naked eye occurring in 10 s at 1 % H<sub>2</sub> concentration, from white to blue-black. Compared to Pd/α-MoO<sub>3</sub> it shows superior gas sensing performance. Through the analysis of the relationship between the material’s structure and performance, the higher density of Lewis acid sites (Mo<sup>6+</sup>) on the surface of β-MoO<sub>3</sub>, its lower bandgap energy, and the synergistic effect of its own structure result in a higher content of Mo<sup>5+</sup> formed during the color change process. Therefore, the reaction rate of β-MoO<sub>3</sub>-based materials is faster, and the color contrast after coloring is more pronounced. These findings provide an important experimental basis for applying monoclinic MoO<sub>3</sub> as a hydrogen sensing material, demonstrating its potential for future environmental monitoring and safety detection. A new perspective on the field of MoO<sub>3</sub>-based high-performance hydrogen gasochromic sensors.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"108 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784809","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-05DOI: 10.1016/j.apsusc.2025.163171
Chan Sik Yoo, Hong-Sub Lee
In this study, we demonstrate a simple post-process to dope Na ions into pre-fabricated TiO2 dielectric thin films using UV irradiation with a NaOH aqueous solution and analyze the distribution of the doped Na dopants within the thin film as well as their effect on the electrical properties. The TiO2 thin films deposited on the bottom electrode by atomic layer deposition (ALD) were immersed in a 30 wt% NaOH aqueous solution and irradiated with UV light for 5 min to induce the desolvation of Na+ and OH− ions in the solution, thereby facilitating Na+ and OH– ion doping within the TiO2 thin film. Secondary ion mass spectrometry analysis confirmed that Na+ ions activated by UV exposure penetrated the TiO2 film up to 1.5 nm (bulk diffusion), 5 nm (dislocation diffusion), and 15 nm (grain boundary diffusion) from the surface. Only the TiO2 films irradiated by UV in the NaOH solution showed a significant reduction in leakage current. Consequently, we successfully achieved doping through a simple method by activating solvated ions in a NaOH solution under UV irradiation, which could improve the leakage characteristics of the oxide thin film caused by intrinsic (or extrinsic) defects.
{"title":"Na doping process using UV and NaOH solution for leakage current reduction in TiO2 dielectric films","authors":"Chan Sik Yoo, Hong-Sub Lee","doi":"10.1016/j.apsusc.2025.163171","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163171","url":null,"abstract":"In this study, we demonstrate a simple post-process to dope Na ions into pre-fabricated TiO<sub>2</sub> dielectric thin films using UV irradiation with a NaOH aqueous solution and analyze the distribution of the doped Na dopants within the thin film as well as their effect on the electrical properties. The TiO<sub>2</sub> thin films deposited on the bottom electrode by atomic layer deposition (ALD) were immersed in a 30 wt% NaOH aqueous solution and irradiated with UV light for 5 min to induce the desolvation of Na<sup>+</sup> and OH<sup>−</sup> ions in the solution, thereby facilitating Na<sup>+</sup> and OH<sup>–</sup> ion doping within the TiO<sub>2</sub> thin film. Secondary ion mass spectrometry analysis confirmed that Na<sup>+</sup> ions activated by UV exposure penetrated the TiO<sub>2</sub> film up to 1.5 nm (bulk diffusion), 5 nm (dislocation diffusion), and 15 nm (grain boundary diffusion) from the surface. Only the TiO<sub>2</sub> films irradiated by UV in the NaOH solution showed a significant reduction in leakage current. Consequently, we successfully achieved doping through a simple method by activating solvated ions in a NaOH solution under UV irradiation, which could improve the leakage characteristics of the oxide thin film caused by intrinsic (or extrinsic) defects.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"37 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782791","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Spatial charge transfer kinetics are the main obstacles limiting the performance of solar-driven hydrogen production. However, the potential design of low-cost two-dimensional (2D) heterojunctions to enable efficient photocatalytic water splitting remains critical for practical applications. To address these issues, this study proposes a one-pot glucose-assisted ball milling process to construct 2D metal-free heterojunctions, combined p-type O-bonded graphene oxide (GO) with n-type intercalated graphitic carbon nitride (CN). The novel sugar-assisted ball milling strategy not only accelerates the exfoliation of CN into monolayer nanosheets but also catalyzes the reduction of GO to its reduced form, resulting in a significant enhancement of electrical conductivity and charge carrier mobility within the composite matrix. The resultant photocatalysts with optimal proportion (i.e., glucose = 0.75 g) not only align the energy levels to provide a channel for efficient interlayer charge separation but also effectively promote a hydrogen generation rate of 89.2 μmol h−1 g−1 for outperforming CN and CN/Pt by factors of 13.5 and 2 as well as improved stability. Mechanistic insights from Kelvin probe force microscopy confirm the unique contribution of the built-in electric field from van der Waals heterojunctions to interfacial charge transport. By monitoring charge transfer dynamics in transient absorption spectra, the prolonged lifetimes of photo-generated electrons signify their favorable role in the photocatalytic process. This study provides valuable interfacial engineering strategies in scalable synthesis of superior photocatalysts, paving the way for the future development of advanced functional materials for sustainable energy solutions and environmental remediation.
{"title":"Interfacial engineering of two-dimensional g-C3N4/graphene oxide heterojunctions from ball milling for photocatalytic reaction promotion","authors":"Xiao Wang, Zhen Zhang, Yanqiu Li, Weidong Hou, Liang Wang, Quan Zou, Liang Tang, Peng Zhang","doi":"10.1016/j.apsusc.2025.163152","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163152","url":null,"abstract":"Spatial charge transfer kinetics are the main obstacles limiting the performance of solar-driven hydrogen production. However, the potential design of low-cost two-dimensional (2D) heterojunctions to enable efficient photocatalytic water splitting remains critical for practical applications. To address these issues, this study proposes a one-pot glucose-assisted ball milling process to construct 2D metal-free heterojunctions, combined p-type O-bonded graphene oxide (GO) with n-type intercalated graphitic carbon nitride (CN). The novel sugar-assisted ball milling strategy not only accelerates the exfoliation of CN into monolayer nanosheets but also catalyzes the reduction of GO to its reduced form, resulting in a significant enhancement of electrical conductivity and charge carrier mobility within the composite matrix. The resultant photocatalysts with optimal proportion (i.e., glucose = 0.75 g) not only align the energy levels to provide a channel for efficient interlayer charge separation but also effectively promote a hydrogen generation rate of 89.2 μmol h<sup>−1</sup> g<sup>−1</sup> for outperforming CN and CN/Pt by factors of 13.5 and 2 as well as improved stability. Mechanistic insights from Kelvin probe force microscopy confirm the unique contribution of the built-in electric field from van der Waals heterojunctions to interfacial charge transport. By monitoring charge transfer dynamics in transient absorption spectra, the prolonged lifetimes of photo-generated electrons signify their favorable role in the photocatalytic process. This study provides valuable interfacial engineering strategies in scalable synthesis of superior photocatalysts, paving the way for the future development of advanced functional materials for sustainable energy solutions and environmental remediation.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"73 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-05DOI: 10.1016/j.apsusc.2025.163092
Lin Wang, Haili Huang, Dongdong Zhang, Hung-Chun Wu, Meiling Li, Huilin Hou, Weiyou Yang, Xuhui Yu, Zonghua Wang
Triethylamine (TEA) is a typically volatile organic compound that poses significant environmental and health risks, due to its high toxicity and volatility. Currently, the exploration of TEA sensors based on semiconductor ZnO is still suffered by their intrinsically low sensitivity, slow response/recovery times, and poor selectivity. Herein, we develop the highly-sensitive TEA sensors based on rationally-designed Co3O4/ZnO p-n heterojunctions, in which the clustered Co3O4 are incorporated into porous ZnO nanosheets. As a result, at the given operating temperature of 260 °C, the as-constructed sensors exhibit an overall enhanced performance with an excellent response of 140.5 to 100 ppm TEA, swift response/recovery times of 6/60 s and high selectivity, representing their promise toward practical applications in advanced TEA sensors.
{"title":"Highly sensitive Triethylamine sensors Enabled by Co3O4/ZnO p-n heterojunctions","authors":"Lin Wang, Haili Huang, Dongdong Zhang, Hung-Chun Wu, Meiling Li, Huilin Hou, Weiyou Yang, Xuhui Yu, Zonghua Wang","doi":"10.1016/j.apsusc.2025.163092","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163092","url":null,"abstract":"Triethylamine (TEA) is a typically volatile organic compound that poses significant environmental and health risks, due to its high toxicity and volatility. Currently, the exploration of TEA sensors based on semiconductor ZnO is still suffered by their intrinsically low sensitivity, slow response/recovery times, and poor selectivity. Herein, we develop the highly-sensitive TEA sensors based on rationally-designed Co<sub>3</sub>O<sub>4</sub>/ZnO <em>p-n</em> heterojunctions, in which the clustered Co<sub>3</sub>O<sub>4</sub> are incorporated into porous ZnO nanosheets. As a result, at the given operating temperature of 260 °C, the as-constructed sensors exhibit an overall enhanced performance with an excellent response of 140.5 to 100 ppm TEA, swift response/recovery times of 6/60 s and high selectivity, representing their promise toward practical applications in advanced TEA sensors.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"6 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-05DOI: 10.1016/j.apsusc.2025.163170
Jihyun Lim, Woongsik Jang, Jin Young Kim, Dong Hwan Wang
In this study, we incorporate a promising small molecule—n-type perylene diimide derivative (NPDI)—into widely used ZnO nanoparticles (NPs) as the electron transport layer, which effectively controls interface defects and leads to significant improvements in the performance and mechanical durability of organic optoelectronic devices. Conventional ZnO NP systems suffer from defects caused by oxygen vacancies at the interface with the Ag electrode in a single-layer configuration, which hinder charge transport and mechanical stress resistance. When the ZnO/NPDI bilayer is introduced, the defects in ZnO are smoothed and bonded, forming a durable passivation layer that inhibits charge recombination and enhances the mechanical properties of flexible devices. Moreover, the ZnO/NPDI bilayer forms an ohmic contact with the Ag electrode while simultaneously enhancing the hole injection barrier, facilitating smooth charge transport and effective dark current suppression. Accordingly, ZnO/NPDI-based flexible organic devices exhibit reduced internal resistance and enhanced stability under bending stresses due to successful interface optimization.
{"title":"Prolonged mechanical dynamics via imide bridged ZnO composites for fast response flexible photo-electronics","authors":"Jihyun Lim, Woongsik Jang, Jin Young Kim, Dong Hwan Wang","doi":"10.1016/j.apsusc.2025.163170","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163170","url":null,"abstract":"In this study, we incorporate a promising small molecule—n-type perylene diimide derivative (NPDI)—into widely used ZnO nanoparticles (NPs) as the electron transport layer, which effectively controls interface defects and leads to significant improvements in the performance and mechanical durability of organic optoelectronic devices. Conventional ZnO NP systems suffer from defects caused by oxygen vacancies at the interface with the Ag electrode in a single-layer configuration, which hinder charge transport and mechanical stress resistance. When the ZnO/NPDI bilayer is introduced, the defects in ZnO are smoothed and bonded, forming a durable passivation layer that inhibits charge recombination and enhances the mechanical properties of flexible devices. Moreover, the ZnO/NPDI bilayer forms an ohmic contact with the Ag electrode while simultaneously enhancing the hole injection barrier, facilitating smooth charge transport and effective dark current suppression. Accordingly, ZnO/NPDI-based flexible organic devices exhibit reduced internal resistance and enhanced stability under bending stresses due to successful interface optimization.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"8 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782789","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-04-05DOI: 10.1016/j.apsusc.2025.163149
Yanfei Jian, He Xu, Yao Wang, Jingjing Wang, Lianghui Xia, Yujie Liu, Yanke Yu, Chi He
Light alkanes are a class of ubiquitous volatile organic compounds (VOCs), which bring great environmental hazards and health risks. However, low-temperature degradation of light alkanes is still a great challenge. Herein, a series of Pt/HZSM-5 catalysts without and with additives of Cr were fabricated. The catalytic performance of the catalysts for C3H8 low temperature combustion was investigated. It was found that Cr element had a significant effect on the activity of Pt/HZSM-5. Pt/Cr1/HZSM-5 performed the best catalytic oxidation activity for C3H8, excellent high temperature stability and water resistance. Characterization results of catalysts indicated that the introduction of Cr element could fix Pt site to promote the dispersion of Pt on the support. Moreover, the interaction between Cr and Pt produced more active Pt species, surface active lattice oxygen and acidic sites, which could promote the activation of C–H bonds in C3H8. Theoretical calculations showed that the interface between Pt and Cr had stronger adsorption for O2 and C3H8, which could accelerate propane oxidation. In this study, the effect of transition metal elements on the promotion of noble metal catalysts in the low-temperature degradation of light alkanes was discussed in depth, and it provided a reference for the design of efficient noble metal molecular sieve catalysts.
{"title":"Chromium promoted the efficient and stable catalytic degradation of propane over Pt/HZSM-5 catalyst: Optimization and reaction mechanism","authors":"Yanfei Jian, He Xu, Yao Wang, Jingjing Wang, Lianghui Xia, Yujie Liu, Yanke Yu, Chi He","doi":"10.1016/j.apsusc.2025.163149","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163149","url":null,"abstract":"Light alkanes are a class of ubiquitous volatile organic compounds (VOCs), which bring great environmental hazards and health risks. However, low-temperature degradation of light alkanes is still a great challenge. Herein, a series of Pt/HZSM-5 catalysts without and with additives of Cr were fabricated. The catalytic performance of the catalysts for C<sub>3</sub>H<sub>8</sub> low temperature combustion was investigated. It was found that Cr element had a significant effect on the activity of Pt/HZSM-5. Pt/Cr<sub>1</sub>/HZSM-5 performed the best catalytic oxidation activity for C<sub>3</sub>H<sub>8</sub>, excellent high temperature stability and water resistance. Characterization results of catalysts indicated that the introduction of Cr element could fix Pt site to promote the dispersion of Pt on the support. Moreover, the interaction between Cr and Pt produced more active Pt species, surface active lattice oxygen and acidic sites, which could promote the activation of C–H bonds in C<sub>3</sub>H<sub>8</sub>. Theoretical calculations showed that the interface between Pt and Cr had stronger adsorption for O<sub>2</sub> and C<sub>3</sub>H<sub>8</sub>, which could accelerate propane oxidation. In this study, the effect of transition metal elements on the promotion of noble metal catalysts in the low-temperature degradation of light alkanes was discussed in depth, and it provided a reference for the design of efficient noble metal molecular sieve catalysts.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"217 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143782796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The oxygen evolution reaction (OER) plays a crucial role in hydrogen production, but its potential is limited by the lack of scalable and stable electrocatalysts for industrial applications. In this study, we developed a repeated impregnation-drying co-precipitation (RIP) method to prepare CoFe-based OER electrocatalysts. We found that the optimized FeCo(OOH)x-5/NF catalyst achieves an overpotential of 340 mV at 500 mA cm−2, significantly outperforming catalysts prepared via hydrothermal or chemical bath deposition methods. The RIP method accelerates the co-precipitation rate of metal ions and helps repair defects between the catalytic layer and the nickel foam substrate, promoting the three-dimensional growth of the catalyst layer. Notably, the entire reaction occurs in air, and the solution can be reused, ensuring the optimal utilization of all ions. Additionally, the FeCo(OOH)x-5/NF catalyst was scaled up to 6000 cm2 to assess the feasibility of roll-to-roll industrial production. In practical alkaline water electrolysis, electrolyzers equipped with FeCo(OOH)x-5&RANEY Nickel catalysts demonstrated excellent performance, achieving 500 mA cm−2 at 1.75 V in 6.0 M KOH. This work provides valuable insights into the design of efficient alkaline OER electrocatalysts, such as FeCo(OOH)x/NF, for promising industrial applications.
{"title":"Optimized repeated impregnation-drying co-precipitation method for roll-to-roll industrial production: A case study on FeCo(OOH)x catalysts for the oxygen evolution reaction","authors":"Duo Xu, Chenchangxiang Wang, Xiaochen Hu, Qiming Sun, Weigao Zhong, Qiangli lv, Haoran Guo, Hua Wang, Zhouhang Li, Kongzhai Li, Zhishan Li","doi":"10.1016/j.apsusc.2025.163180","DOIUrl":"https://doi.org/10.1016/j.apsusc.2025.163180","url":null,"abstract":"The oxygen evolution reaction (OER) plays a crucial role in hydrogen production, but its potential is limited by the lack of scalable and stable electrocatalysts for industrial applications. In this study, we developed a repeated impregnation-drying co-precipitation (RIP) method to prepare CoFe-based OER electrocatalysts. We found that the optimized FeCo(OOH)<sub>x</sub>-5/NF catalyst achieves an overpotential of 340 mV at 500 mA cm<sup>−2</sup>, significantly outperforming catalysts prepared via hydrothermal or chemical bath deposition methods. The RIP method accelerates the co-precipitation rate of metal ions and helps repair defects between the catalytic layer and the nickel foam substrate, promoting the three-dimensional growth of the catalyst layer. Notably, the entire reaction occurs in air, and the solution can be reused, ensuring the optimal utilization of all ions. Additionally, the FeCo(OOH)<sub>x</sub>-5/NF catalyst was scaled up to 6000 cm<sup>2</sup> to assess the feasibility of roll-to-roll industrial production. In practical alkaline water electrolysis, electrolyzers equipped with FeCo(OOH)<sub>x</sub>-5&RANEY Nickel catalysts demonstrated excellent performance, achieving 500 mA cm<sup>−2</sup> at 1.75 V in 6.0 M KOH. This work provides valuable insights into the design of efficient alkaline OER electrocatalysts, such as FeCo(OOH)<sub>x</sub>/NF, for promising industrial applications.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"183 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2025-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143784808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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