{"title":"Boosting electrocatalytic performance of CoFe hydroxide catalyst by P-doping for oxygen evolution","authors":"","doi":"10.1016/j.jtice.2024.105664","DOIUrl":null,"url":null,"abstract":"<div><h3>Background</h3><p>As one of the most favorable catalysts for the oxygen evolution reaction (OER) in alkaline electrolytes, cobalt iron layered double hydroxide (CoFe LDH) stands out among the others. Yet its catalytic activity still needs improvement.</p></div><div><h3>Methods</h3><p>In this paper, doping of non-metallic elements is introduced to enhance its catalytic activity for OER. Using a one-step solvothermal method, P-doped CoFe layered double hydroxide (P-doped CoFe LDH) was synthesized and grown on nickel foam (NF).</p></div><div><h3>Significant findings</h3><p>P-doped CoFe LDH/NF exhibits superior catalytic activity for oxygen evolution relative to CoFe LDH/NF prepared using the same method. A high current density of 300 mA cm<sup>-2</sup> only requires an overpotential of 347 mV. Compared with CoFe LDH/NF (367 mV), this is dramatically smaller. XPS analyses indicate that the contents of Co<sup>3+</sup> and Fe<sup>3+</sup> high oxidation state species in P-doped CoFe LDH/NF are obviously higher than that in CoFe LDH/NF. Stability tests demonstrated P-doped CoFe LDH kept 72 h. And surfaces of P-doped CoFe LDH had interconnected porous two-dimensional nanosheet structures, which contributed to stable nature of the electrode. Our work provides the strategy of P doping to enhance OER performance for LDH-based electrocatalysts.</p></div>","PeriodicalId":381,"journal":{"name":"Journal of the Taiwan Institute of Chemical Engineers","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2024-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of the Taiwan Institute of Chemical Engineers","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1876107024003225","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Background
As one of the most favorable catalysts for the oxygen evolution reaction (OER) in alkaline electrolytes, cobalt iron layered double hydroxide (CoFe LDH) stands out among the others. Yet its catalytic activity still needs improvement.
Methods
In this paper, doping of non-metallic elements is introduced to enhance its catalytic activity for OER. Using a one-step solvothermal method, P-doped CoFe layered double hydroxide (P-doped CoFe LDH) was synthesized and grown on nickel foam (NF).
Significant findings
P-doped CoFe LDH/NF exhibits superior catalytic activity for oxygen evolution relative to CoFe LDH/NF prepared using the same method. A high current density of 300 mA cm-2 only requires an overpotential of 347 mV. Compared with CoFe LDH/NF (367 mV), this is dramatically smaller. XPS analyses indicate that the contents of Co3+ and Fe3+ high oxidation state species in P-doped CoFe LDH/NF are obviously higher than that in CoFe LDH/NF. Stability tests demonstrated P-doped CoFe LDH kept 72 h. And surfaces of P-doped CoFe LDH had interconnected porous two-dimensional nanosheet structures, which contributed to stable nature of the electrode. Our work provides the strategy of P doping to enhance OER performance for LDH-based electrocatalysts.
期刊介绍:
Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.