Boosting alkaline hydrogen evolution via spontaneous built-in electric field  

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作  者:Ze-Peng Lv Da-He Zhang Meng-Lu Zang Shao-Long Li Ji-Lin He Jian-Xun Song 

机构地区:[1]Zhongyuan Critical Metals Laboratory,Zhengzhou University,Zhengzhou 450001,China [2]Henan Province Industrial Technology Research Institute of Resources and Materials,Zhengzhou University,Zhengzhou 450001,China [3]College of Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China

出  处:《Rare Metals》2024年第11期5848-5859,共12页稀有金属(英文版)

基  金:financially supported by the National Natural Science Foundation of China(No.52304335);China Postdoctoral Science Foundation(No.2023TQ0303);the Postdoctoral Fellowship Program of CPSF(No.GZC20232450);the Project of Zhongyuan Critical Metals Laboratory(Nos.GJJSGFYQ202305 and GJJSGFJQ202302);the Youth Science and technology innovation of Henan Province(No.23HASTIT009);Henan Province Youth Talent Support Program(2022)。

摘  要:The electrochemical reaction rate strongly depends on the pH of the solution and the relatively sluggish alkaline hydrogen evolution reaction(HER)process,attributed to alterations in the type of proton donor and binding energy,has consistently presented a significant challenge.Here,we report a new method for boosting alkaline HER via spontaneous built-in electric field strategy employed on cobalt phosphide nanofibers(NFs)electrocatalyst.The anion-cation dual-introduction of V and N on the NFs not only increases the electrochemical surface area but also enhances the catalytic activity,thereby elevating the performance of alkaline HER.An investigation strategy combining experiments and calculations revealed the charge transfer law between multiple active components and the enhanced regulation mechanism of alkaline HER process,ultimately achieving a nearly twice increase in reaction overpotential of the as-fabricated catalyst at-10 mA·cm^(-2).This new approach provides a potential strategy for improving the efficiency of core catalyst for energy conversion technologies.

关 键 词:Multiple active sites Built-in electric felid Chemical substitution Hydrogen ELECTROCATALYST 

分 类 号:TQ116.21[化学工程—无机化工] O643.36[理学—物理化学]

 

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