Ru纳米团簇/MoO_(3-x)纳米带双功能催化剂的合成及其肼辅助全解水性能  

Synthesis and Hydrazine-Assisted Overall Water Splitting Performance of Ru Nanoclusters/MoO_(3-x) Nanobelt Bifunctional Catalyst

作　　者：常亚楠 陆徐云 马张玉 许冬冬[1] 刘影 包建春[1] CHANG Ya-Nan;LU Xu-Yun;MA Zhang-Yu;XU Dong-Dong;LIU Ying;BAO Jian-Chun(College of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学化学与材料科学学院,南京210023

出　　处：《无机化学学报》2022年第10期2037-2046,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.22075147,22102073)资助。

摘　　要：将超小Ru纳米团簇锚定于富含氧空位MoO_(3-x)纳米带的双功能催化剂(Ru/MoO_(3-x))。该催化剂展现出优异的肼氧化(HzOR)和析氢反应(HER)催化性能,10 mA·cm^(-2)时的过电势分别为-79和-27 mV,所组成的肼辅助电催化全解水(OWS)的电解池电压仅为13 mV,明显优于商业化20%Pt/C和已报道的一些催化剂。如此优异的性能主要归因于Ru纳米团簇有利于HzOR中N_(2)H_(4)的脱氢和HER氢中间体的吸/脱附平衡以及MoO_(3-x)中的氧空位和Ru/MoO_(3-x)异质结构导致的丰富的电化学活性位点和优化的电子转移动力学。This work reports a bifunctional catalyst consisting of ultra⁃small Ru nanoclusters anchored onto oxygen⁃vacancy⁃enriched MoO_(3-x) nanobelts(Ru/MoO_(3-x)).The obtained catalyst exhibited excellent hydrazine oxidation reac⁃tion(HzOR)and hydrogen evolution reaction(HER)performances with a low overpotential of-79 and-27 mV at 10 mA·cm^(-2),respectively.And the assembled hydrazine⁃assisted overall water splitting(OWS)device required a low cell voltage of only 13 mV,significantly better than commercial 20%Pt/C and some recently reported catalysts.Such excellent performance is mainly attributed to Ru nanoclusters facilitating dehydrogenation of N_(2)H_(4) in HzOR and balancing of H*adsorption/desorption in HER and the abundant electrochemical active sites,optimized elec⁃tron transfer kinetics resulting from oxygen vacancies in MoO_(3-x) and Ru/MoO_(3-x) heterostructures.

关 键 词：钌 肼氧化反应 析氢反应 氧空位 双功能催化剂 

分 类 号：O643.36[理学—物理化学]