摘要
Keggin型多金属氧酸盐(POMs)因其独特的多电子转移行为而被广泛用于电催化析氢反应(HER)。在此,本工作合成了一系列结构简单的以不同季铵阳离子为抗衡离子的Keggin型含Co多金属氧盐(Co-POMs),通过FT-IR、XRD、SEM、XPS手段对其结构进行表征。结果表明,这些杂化材料很好地保留了Co-POMs阴离子结构。在酸性介质中对其HER性能进行研究,结果表明抗衡离子中含有苯环的TMPA[Co^(Ⅲ)W_(12)]表现出优异的析氢性能,过电位为141 mV(vs. RHE),该材料具有良好的导电性能和较大的电化学活性表面积。此外,由于季铵盐阳离子的疏水性,在电催化反应后没有机械脱落和化学降解现象,表现出较强的稳定性。
Keggin⁃type polyoxymetallates(POMs)are widely used in electrocatalytic hydrogen evolution(HER)because of their unique multi⁃electron transfer behavior.Herein,a series of Keggin⁃type Co⁃containing polyoxymetallic salts(Co⁃POMs)with different quaternary ammonium cations as counterion ions were synthesized.The hybridized materials were characterized by FT⁃IR,XRD,SEM,and XPS,and the results showed that these hybrid materials retained the Co⁃POMs anionic structure well.Their HER performance in acidic media was studied as well.It showed that TMPA[Co^(Ⅲ)W_(12)]which had good electrical conductivity and a large electrochemically active surface area exhibited excellent hydrogen evolution performance with an overpotential of 141 mV(vs.RHE).In addition,due to the hydrophobicity of quaternary ammonium cations,there is no mechanical shedding and chemical degradation after electrocatalytic reaction,attesting its strong stability.
作者
张瀚
温叶倩
ZHANG Han;WEN Yeqian(Institute of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China)
出处
《材料导报》
CSCD
北大核心
2023年第S02期517-523,共7页
Materials Reports
基金
国家自然科学基金(21606069)
河北省自然科学基金(B2017202187)。
关键词
多金属氧酸盐
析氢反应
季铵盐
钴
电催化
polyoxometalate
hydrogen evolution reaction
quaternary ammonium salt
cobalt
electrocatalysis
