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Catalytic N2O decomposition in an electric field at low temperatures 低温电场催化 N2O 分解
IF 5 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-08 DOI: 10.1039/d4cy00698d
Ayaka Shigemoto, Takuma Higo, Chihiro Ukai, Yuki Inoda, Kenta Mitarai, Yasushi Sekine
{"title":"Catalytic N2O decomposition in an electric field at low temperatures","authors":"Ayaka Shigemoto, Takuma Higo, Chihiro Ukai, Yuki Inoda, Kenta Mitarai, Yasushi Sekine","doi":"10.1039/d4cy00698d","DOIUrl":"https://doi.org/10.1039/d4cy00698d","url":null,"abstract":"Nitrous oxide (N<small><sub>2</sub></small>O) exerts strong effects on global warming and environmental destruction. Various catalytic technologies have been investigated for N<small><sub>2</sub></small>O abatement. We investigated a catalytic system in an electric field, revealing that N<small><sub>2</sub></small>O can be decomposed efficiently, even at low temperatures and in the presence of excess oxygen and water vapour. Reaction mechanisms with and without an electric field have been investigated using kinetics and various <em>operando</em> analyses, which revealed that surface-lattice oxygen on catalyst supports plays a crucially important role in N<small><sub>2</sub></small>O decomposition in an electric field at low temperatures.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572836","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}
引用次数: 0
A review on durability of key components of PEM fuel cells 关于 PEM 燃料电池关键部件耐久性的综述
IF 5 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-08 DOI: 10.1039/d4cy00351a
Zhenyang Xie, Jian Wang, Guangyao Zhao, Qinyi Zhang, Hua Fan, Aohua Zeng, Wei Ding
{"title":"A review on durability of key components of PEM fuel cells","authors":"Zhenyang Xie, Jian Wang, Guangyao Zhao, Qinyi Zhang, Hua Fan, Aohua Zeng, Wei Ding","doi":"10.1039/d4cy00351a","DOIUrl":"https://doi.org/10.1039/d4cy00351a","url":null,"abstract":"Proton exchange membrane fuel cells (PEMFCs) are considered to be a clean energy technology to replace conventional internal combustion engines in automobiles. PEMFCs undergo a complex degradation involving multiple dimensions, materials, and factors. This review focuses on the decay of key materials of PEMFCs after durability tests longer than 2000 hours, providing an in-depth look at degradation behaviors at the material and component levels. The H<small><sub>2</sub></small>-crossover current, ohmic resistance, kinetics current and the limiting current were thus identified as core primary factors from the perspective of performance and stability. Besides, the critical aging factors of key components were defined as where significant numerical changes occur during the aging process, causing any one or more of the four core primary factors to change by more than 10% in physical or chemical parameters.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572849","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}
引用次数: 0
Dynamic stability of Pt-based alloys for fuel-cell catalysts calculated from atomistics 通过原子统计学计算燃料电池催化剂铂基合金的动态稳定性
IF 5 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-04 DOI: 10.1039/d4cy00463a
Shubham Sharma, Cheng Zeng, Andrew A. Peterson
{"title":"Dynamic stability of Pt-based alloys for fuel-cell catalysts calculated from atomistics","authors":"Shubham Sharma, Cheng Zeng, Andrew A. Peterson","doi":"10.1039/d4cy00463a","DOIUrl":"https://doi.org/10.1039/d4cy00463a","url":null,"abstract":"The oxygen reduction reaction (ORR) is the fundamental electron-accepting reaction in aqueous electrochemistry, and is crucial to technologies such as fuel cells and batteries. Alloys of Pt that produce a surface Pt layer under mildly compressive strain are generally the most reactive catalysts for this reaction; however, their long-term durability can vary widely with preparation. In this work, we develop atomistic models based on electronic structure calculations to compare and rationalize the stability of such electrocatalysts, focusing on contrasting face-centered tetragonal (FCT or L1<small><sub>0</sub></small>) alloys of Fe, Ni and Co with that of their face-centered cubic (FCC or L1<small><sub>2</sub></small>) counterparts. We first describe how the non-noble elements Ni, Fe, Co and Sc of the near-surface alloy have the driving force to undergo rapid dissolution at fuel-cell operating conditions, whereas Pt is quite stable against dissolution, leading to the well-known surface Pt enrichment. Post dissolution, we discuss the kinetics associated with diffusion of sub-surface elements through a vacancy mediated diffusion model. Through the diffusion models, we compare and discuss the effect of geometry and surface structure on an electrocatalyst's stability. We show that alloying Pt with non-noble elements results in significantly higher kinetic stability of the core as compared to pure Pt. Our calculations suggest that the diffusion energetics at the bulk can be quite different from the near-surface region; we conclude the surface rates are more essential. We find that L1<small><sub>0</sub></small> structures of Fe and Co could provide better stability than the L1<small><sub>2</sub></small> systems, especially in the presence of Pt overlayers. In contrast, for Sc-containing species, we argue that presence of Pt overlayers destabilizes the catalytic surface, as also reported by an experimental study.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141552829","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}
引用次数: 0
Investigation of titania and ceria support effects in nickel catalyzed CO2 methanation 镍催化二氧化碳甲烷化过程中二氧化钛和铈支撑效应的研究
IF 5 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-03 DOI: 10.1039/d4cy00461b
Majed Alam Abir, Rachel E. Phillips, Joseph Z. M. Harrah, Madelyn R. Ball
{"title":"Investigation of titania and ceria support effects in nickel catalyzed CO2 methanation","authors":"Majed Alam Abir, Rachel E. Phillips, Joseph Z. M. Harrah, Madelyn R. Ball","doi":"10.1039/d4cy00461b","DOIUrl":"https://doi.org/10.1039/d4cy00461b","url":null,"abstract":"Ni catalysts, supported on TiO<small><sub>2</sub></small> or CeO<small><sub>2</sub></small>, are active and selective for CO<small><sub>2</sub></small> methanation. To investigate the role of the support on the resulting Ni structure and catalytic performance, catalysts were prepared by strong electrostatic adsorption, incipient wetness impregnation, and colloidal nanoparticle synthesis. The reactivity follows a volcano-type trend with Ni particle size on both TiO<small><sub>2</sub></small> and CeO<small><sub>2</sub></small> supports. To explain this trend, the role of the support on the reducibility of the Ni particles and distribution of basic sites on CO<small><sub>2</sub></small> methanation activity was investigated. Using <em>in situ</em> infrared spectroscopy, we found that on TiO<small><sub>2</sub></small> supported catalysts with larger Ni particles, CO<small><sub>2</sub></small> methanation proceeds <em>via</em> a CO intermediate and the highest activity was observed when CO<small><sub>2</sub></small> methanation occurs through both CO and carbonate intermediates. For catalysts with smaller particles on TiO<small><sub>2</sub></small>, however, no CO intermediates are observed, and catalytic activity is lower. For CeO<small><sub>2</sub></small>, the methanation also proceeds <em>via</em> a CO intermediate, though for larger Ni particles only CO species were observed. CeO<small><sub>2</sub></small> without Ni can create surface formate species but has low reactivity towards methanation. In this investigation, we demonstrate a connection between the size of Ni particles, their corresponding adsorbed surface species, and their reactivity for CO<small><sub>2</sub></small> methanation.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141572840","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}
引用次数: 0
Mechanistic origins for the enhanced ethanol dehydration kinetics in H-ZSM-5 by cofeeding n-butanol 正丁醇共馈增强 H-ZSM-5 中乙醇脱水动力学的机理渊源
IF 5 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-02 DOI: 10.1039/d4cy00532e
Arno de Reviere, An Verberckmoes, Maarten K. Sabbe
{"title":"Mechanistic origins for the enhanced ethanol dehydration kinetics in H-ZSM-5 by cofeeding n-butanol","authors":"Arno de Reviere, An Verberckmoes, Maarten K. Sabbe","doi":"10.1039/d4cy00532e","DOIUrl":"https://doi.org/10.1039/d4cy00532e","url":null,"abstract":"Periodic density functional theory (DFT) with dispersion corrections is used to construct a detailed reaction network for dehydration of <em>n</em>-butanol/ethanol mixtures in H-ZSM-5. Apart from the direct conversion of the alcohols to olefins or di-alkyl-ethers, novel mechanisms have been explored for the formation and decomposition of a cross-ether, butyl ethyl ether. Furthermore, a novel mechanism that affects the intrinsic activity of ethanol dehydration to ethene is found, the <em>n</em>-butanol-assisted ethanol dehydration. Thermodynamic and kinetic parameters for all elementary reaction steps were calculated and implemented in a microkinetic model capable of simulating the dehydration of (i) pure ethanol, (ii) pure <em>n</em>-butanol and (iii) <em>n</em>-butanol/ethanol mixtures over a H-ZSM-5 catalyst. The microkinetic model was able to reasonably predict the observed experimental results. A reaction path analysis shows that the mixed ether is primarily formed through an S<small><sub>N</sub></small>2 mechanism, where the water is split off from ethanol, except at low alcohol pressure. The mixed ether decomposes predominantly to butenes and ethanol. Contrary to pure ethanol dehydration, if sufficient <em>n</em>-butanol is available, ethylene is primarily formed through a novel butanol-assisted mechanism for <em>n</em>-butanol/ethanol mixtures, indicating the intrinsic activity for ethanol dehydration is – here beneficially – altered by cofeeding of butanol. These results hint towards the possibility of cofeeding strategies to accelerate the conversion of a less reactive reagent.","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":5.0,"publicationDate":"2024-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141549687","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}
引用次数: 0
Diffusion mechanisms and preferential dynamics of promoter molecules in ZSM-5 zeolite† 促进剂分子在 ZSM-5 沸石中的扩散机制和优先动力学
IF 4.4 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-01 DOI: 10.1039/d4cy00506f
Josh Dunn , Joe Crossley-Lewis , Andrew R. McCluskey , Fiona Jackson , Corneliu Buda , Glenn J. Sunley , Adrian J. Mulholland , Neil L. Allan
{"title":"Diffusion mechanisms and preferential dynamics of promoter molecules in ZSM-5 zeolite†","authors":"Josh Dunn ,&nbsp;Joe Crossley-Lewis ,&nbsp;Andrew R. McCluskey ,&nbsp;Fiona Jackson ,&nbsp;Corneliu Buda ,&nbsp;Glenn J. Sunley ,&nbsp;Adrian J. Mulholland ,&nbsp;Neil L. Allan","doi":"10.1039/d4cy00506f","DOIUrl":"10.1039/d4cy00506f","url":null,"abstract":"<div><p>The diffusion in ZSM-5 zeolite of methanol and of two series of promoters of the methanol to dimethyl ether reaction (linear methyl esters, benzaldehyde, 4-<em>n</em>-alkyl benzaldehydes) has been studied using classical molecular dynamics in the NVT ensemble. Whereas promoter diffusion coefficients decrease with increasing alkyl chain length in methyl esters, the aromatic aldehyde promoters all have similar diffusion coefficients. The lowest diffusion coefficient is that of benzaldehyde. All the promoters exhibit a preference for moving in the straight pore, a preference that is most pronounced for the 4-<em>n</em>-alkylbenzaldehydes and least for the longest aliphatic esters. A novel diffusion mechanism, a molecular ‘3-point turn’, is observed. This likely plays an important role in allowing the most potent promoters, with longer linear alkyl chains, to access all of the Brønsted acid reaction sites. The diffusion coefficient of methanol is larger than that of all the promoters. The more catalytically active aromatic aldehyde promoters limit methanol diffusion less than the aliphatic esters.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/cy/d4cy00506f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141254716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Boosting photocatalytic efficiency of iridium polypyridyl complex in coupling reaction through the induction of ferrocene: insights into bimetallic catalysis†‡ 通过诱导二茂铁提高多吡啶铱络合物在偶联反应中的光催化效率:双金属催化的启示†‡
IF 4.4 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-01 DOI: 10.1039/d3cy01418e
Firdaus Rahaman Gayen , Sakshi Chawla , Debashree Bora , Lodsna Borkotoky , Sarifuddin Gazi , Dibyendu Mallick , Ram Awatar Maurya , Arijit Kumar De , Biswajit Saha
{"title":"Boosting photocatalytic efficiency of iridium polypyridyl complex in coupling reaction through the induction of ferrocene: insights into bimetallic catalysis†‡","authors":"Firdaus Rahaman Gayen ,&nbsp;Sakshi Chawla ,&nbsp;Debashree Bora ,&nbsp;Lodsna Borkotoky ,&nbsp;Sarifuddin Gazi ,&nbsp;Dibyendu Mallick ,&nbsp;Ram Awatar Maurya ,&nbsp;Arijit Kumar De ,&nbsp;Biswajit Saha","doi":"10.1039/d3cy01418e","DOIUrl":"10.1039/d3cy01418e","url":null,"abstract":"<div><p>A bimetallic compound [Ir(ppy)<sub>2</sub>(fcbpy)]PF<sub>6</sub> (<strong>2</strong>, ppy = 2-phenylpyridine; fcbpy = 4-ferrocenyl-2,2′-bipyridine) is synthesized, and its molecular structure is established by single crystal XRD. The catalytic activity of <strong>2</strong> is probed in the coupling of α-ketovinylazides with <em>N</em>,<em>N</em>-dimethylanilines in the presence of light. A maximum of 94% yield is obtained within 23.9 minutes in a micro flowreactor with a turnover number and turnover frequency of 940 and 2350 h<sup>−1</sup>, respectively. A catalyst lacking the ferrocene moiety, [Ir(ppy)<sub>2</sub>(bpy)]PF<sub>6</sub>, failed to provide any yield even with higher catalyst loading. The redox and photophysical properties of <strong>2</strong> are thoroughly investigated using electrochemistry and different steady-state and time-resolved spectroscopic techniques. Photoluminescence lifetime measurements and femtosecond transient absorption studies revealed the formation of a long-lived excited state in <strong>2</strong> after photoexcitation. Thus, the enhanced catalytic performance through the induction of ferrocene is rationalized based on transiently shelving electrons in the triplet state for a longer period of time, thereby efficiently harnessing them in photocatalysis.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141475023","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}
引用次数: 0
Application of machine learning to discover new intermetallic catalysts for the hydrogen evolution and the oxygen reduction reactions† 应用机器学习发现氢气进化和氧气还原反应的新型金属间催化剂†。
IF 4.4 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-01 DOI: 10.1039/d4cy00491d
Carmen Martínez-Alonso , Valentin Vassilev-Galindo , Benjamin M. Comer , Frank Abild-Pedersen , Kirsten T. Winther , Javier LLorca
{"title":"Application of machine learning to discover new intermetallic catalysts for the hydrogen evolution and the oxygen reduction reactions†","authors":"Carmen Martínez-Alonso ,&nbsp;Valentin Vassilev-Galindo ,&nbsp;Benjamin M. Comer ,&nbsp;Frank Abild-Pedersen ,&nbsp;Kirsten T. Winther ,&nbsp;Javier LLorca","doi":"10.1039/d4cy00491d","DOIUrl":"10.1039/d4cy00491d","url":null,"abstract":"<div><p>The adsorption energies for hydrogen, oxygen, and hydroxyl were calculated by means of density functional theory on the lowest energy surface of 24 pure metals and 332 binary intermetallic compounds with stoichiometries AB, A<sub>2</sub>B, and A<sub>3</sub>B taking into account the effect of biaxial elastic strains. This information was used to train two random forest regression models, one for the hydrogen adsorption and another for the oxygen and hydroxyl adsorption, based on 9 descriptors that characterized the geometrical and chemical features of the adsorption site as well as the applied strain. All the descriptors for each compound in the models could be obtained from physico-chemical databases. The random forest models were used to predict the adsorption energy for hydrogen, oxygen, and hydroxyl of ≈2700 binary intermetallic compounds with stoichiometries AB, A<sub>2</sub>B, and A<sub>3</sub>B made of metallic elements, excluding those that were environmentally hazardous, radioactive, or toxic. This information was used to search for potential good catalysts for the HER and ORR from the criteria that their adsorption energy for H and O/OH, respectively, should be close to that of Pt. This investigation shows that the suitably trained machine learning models can predict adsorption energies with an accuracy not far away from density functional theory calculations with minimum computational cost from descriptors that are readily available in physico-chemical databases for any compound. Moreover, the strategy presented in this paper can be easily extended to other compounds and catalytic reactions, and is expected to foster the use of ML methods in catalysis.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141475056","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}
引用次数: 0
Size-dependent plasmonic activity of AuNPs for the rational design of catalysts for organic reactions† 合理设计有机反应催化剂所需的 AuNPs 大小依赖性质子活性
IF 4.4 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-01 DOI: 10.1039/d4cy00084f
Daria Votkina , Andrii Trelin , Viktor Semin , Oleksiy Lyutakov , Vaclav Svorcik , Pavel Petunin , Gérard Audran , Sylvain R. A. Marque , Olga Guselnikova , Pavel Postnikov
{"title":"Size-dependent plasmonic activity of AuNPs for the rational design of catalysts for organic reactions†","authors":"Daria Votkina ,&nbsp;Andrii Trelin ,&nbsp;Viktor Semin ,&nbsp;Oleksiy Lyutakov ,&nbsp;Vaclav Svorcik ,&nbsp;Pavel Petunin ,&nbsp;Gérard Audran ,&nbsp;Sylvain R. A. Marque ,&nbsp;Olga Guselnikova ,&nbsp;Pavel Postnikov","doi":"10.1039/d4cy00084f","DOIUrl":"10.1039/d4cy00084f","url":null,"abstract":"<div><p>The rational design of plasmonic catalysts encompasses the manipulation of nanoparticle (NP) size. However, their effects on the overall performance in organic reactions are still poorly understood. Decreasing the metal-catalyst size in nanoclusters is an emerging direction for developing more efficient and cost-effective plasmonic systems. Despite some examples of successful organic reactions driven by plasmons excited on AuNPs of different sizes are reported, consistency in the effect of size on catalytic activity is lacking. Herein, we tested spherical AuNPs of size 3, 13, 22, 32, and 67 nm in common model organic reactions. In this work, we report the discovery of a size effect of commonly used AuNPs. Smaller AuNPs are proven to be multiply more efficient and stable against agglomeration in model reactions compared to larger AuNPs. Turnover frequency (TOF) and quantum yield (QY) were established to describe this phenomenon. Preliminary analysis showed the potential of smaller AuNPs in terms of cost, stability and technological appeal. This was because of a simple preparation procedure and reduced consumption of gold with maximum efficiency. For example, to achieve the same TOF and QY, 22-times more 67 nm AuNPs would be required compared with 3 nm AuNPs. This work suggests a tool for utilization of plasmon catalysis in organic synthesis by minimizing expenses due to energy and catalysts.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141254747","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}
引用次数: 0
Manipulating electron redistribution in platinum for enhanced alkaline water splitting kinetics† 操纵铂金中的电子再分布,提高碱性水分离动力学†。
IF 4.4 3区 化学
Catalysis Science & Technology Pub Date : 2024-07-01 DOI: 10.1039/d4cy00503a
Wensheng Zhang , Xu Chen , Jinyu Zhao , Lin Niu , Guipeng Wang , Xiaomin Wang
{"title":"Manipulating electron redistribution in platinum for enhanced alkaline water splitting kinetics†","authors":"Wensheng Zhang ,&nbsp;Xu Chen ,&nbsp;Jinyu Zhao ,&nbsp;Lin Niu ,&nbsp;Guipeng Wang ,&nbsp;Xiaomin Wang","doi":"10.1039/d4cy00503a","DOIUrl":"10.1039/d4cy00503a","url":null,"abstract":"<div><p>The potential of hydrogen production <em>via</em> water splitting technology makes it urgent to develop low-cost and highly active bifunctional catalysts for hydrogen and oxygen evolution reactions (HER/OER). In this study, a low platinum (Pt) bimetallic phosphide heterostructure (Pt-NiFe-P/NF), derived from three-dimensional NiFe metal–organic framework (NiFe-MOF) nanorods on nickel foam (NF), was developed using a two-step hydrothermal and phosphorization process. The nickel-iron phosphide nanorod array heterostructure boasts a large surface area with numerous active sites, which enhances charge and substance transfer. The integration of metallic Pt with NiFe-P heterostructures subtly adjusts the electronic redistribution between them, thereby improving the kinetics of water splitting. Consequently, the Pt-NiFe-P/NF catalyst demonstrated exceptional HER and OER performance in a 1 M KOH solution, with overpotentials of 97 and 266 mV at 100 mA cm<sup>−2</sup>, respectively. Remarkably, an electrolyzer utilizing this catalyst requires just a 1.65 V potential to achieve a current density of 100 mA cm<sup>−2</sup>, exceeding the capabilities of conventional Pt/C||RuO<sub>2</sub> systems, which require 2.10 V and outperforming many advanced electrochemical water splitting catalysts currently in use.</p></div>","PeriodicalId":66,"journal":{"name":"Catalysis Science & Technology","volume":null,"pages":null},"PeriodicalIF":4.4,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141475014","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}
引用次数: 0
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