电催化剂
催化作用
法拉第效率
星团(航天器)
镍
Atom(片上系统)
电解
金属
吸附
材料科学
化学
纳米颗粒
化学物理
无机化学
纳米技术
电化学
物理化学
电极
冶金
有机化学
嵌入式系统
电解质
程序设计语言
计算机科学
作者
Hao Qi,Qingfeng Tang,Haixia Zhong,Jiazhi Wang,Dong-Xue Liu,Xinbo Zhang
标识
DOI:10.1016/j.scib.2022.06.006
摘要
Single-atom catalysts (SACs) have attracted increasing concerns in electrocatalysis because of their maximal metal atom utilization, distinctive electronic properties, and catalytic performance. However, the isolated single sites are disadvantageous for reactions that require simultaneously activating different reactants/intermediates. Fully exposed metal cluster catalyst (FECC), inheriting the merits of SACs and metallic nanoparticles, can synergistically adsorb and activate reactants/intermediates on their multi-atomic sites, demonstrating great promise in electrocatalytic reactions. Here a facile method to regulate the atomic dispersion of Ni species from cluster to single-atom scale for efficient CO2 reduction was developed. The obtained Ni FECC exhibits high Faradaic efficiency of CO up to 99%, high CO partial current density of 347.2 mA cm−2, and robust durability under 20 h electrolysis. Theoretical calculations illuminate that the ensemble of multiple Ni atoms regulated by sulfur atoms accelerates the reaction kinetics and thus improves CO production.
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