摘要
在“双碳”目标驱动下,高效非贵金属析氢反应(HER)催化剂的合理设计对推动电解水的规模化应用至关重要。本文基于水热法在泡沫镍上原位合成了NiMoO_(4)@MoO_(3)/NF自支撑电极,并通过物理化学表征与电化学方法系统探究了其形貌结构、电子特性及HER催化性能。结构分析表明,该电极表面由NiMoO_(4)微纳米棒与MoO_(3)纳米花复合,形成了三维分级结构。同时,元素价态分析表明,Ni与Mo之间的电子相互作用协同优化了活性位点的电子环境。电化学测试表明,在1 mol·L^(-1)KOH中,该电极的HER过电位(η10=176 mV)、Tafel斜率(79.91 mV·dec^(-1))及电荷转移电阻(13.1Ω)均显著低于单金属电极,且在10 h稳定性测试后,其电流密度保持率可达75%。本研究通过双金属协同与结构设计的联合优化,为析氢催化剂的开发提供了新思路,未来需进一步探究其在工业级工况下的稳定性。
Under the“dual carbon”goals,the rational design of efficient non-noble metal hydrogen evolution reaction(HER)catalysts is critical for advancing scalable water electrolysis.In this study,a self-supported NiMoO_(4)@MoO_(3)/NF electrode was synthesized in situ on nickel foam via a hydrothermal method.Its morphological structure,electronic properties,and HER catalytic performance were systematically investigated through comprehensive physicochemical characterization and electrochemical analyses.Structural analyses revealed a 3D hierarchical architecture constructed by interlaced NiMoO_(4) micronanorods and MoO_(3) nanoflowers.Valence state investigations demonstrated that the electronic interaction between Ni and Mo synergistically optimized the electronic environment of active sites.Electrochemical tests in 1 mol·L^(-1) KOH demonstrated that this electrode exhibits a significantly lower HER overpotential(η10=176 mV),a smaller Tafel slope(79.91 mV·dec^(-1)),and a reduced charge transfer resistance(13.1Ω)compared to monometallic counterparts.The electrode retained approximately 75%of its initial current density after a 10-hour stability test.This work provides a novel strategy for hydrogen evolution catalyst development through the combined optimization of bimetallic synergy and structural design.Future research should focus on its stability under industrial operating conditions.
作者
邵玉禾
钟鸿业
邱阳
罗春晖
赵强
闫康平
SHAO Yuhe;ZHONG Hongye;QIU Yang;LUO Chunhui;ZHAO Qiang;YAN Kangping(School of Chemical Engineering,Sichuan University,Chengdu 610000,China)
出处
《电子元件与材料》
北大核心
2025年第9期993-1001,共9页
Electronic Components And Materials
基金
国家自然科学基金青年科学基金项目(22108185)。
关键词
自支撑电极
析氢反应
双金属协同效应
泡沫镍
self-supported electrode
hydrogen evolution reaction
bimetallic synergistic effect
nickel foam
