钌
无定形固体
Atom(片上系统)
离解(化学)
金属
氢氧化钴
氢原子
氢氧化物
镍
电子转移
过渡金属
化学
结晶学
非晶态金属
催化作用
氢
电化学
材料科学
光化学
无机化学
物理化学
电极
冶金
有机化学
嵌入式系统
计算机科学
烷基
作者
Yang Liu,Xinghui Liu,Amol R. Jadhav,Taehun Yang,Yosep Hwang,Hongdan Wang,Lingling Wang,Yongguang Luo,Ashwani Kumar,Jinsun Lee,Huong Thi Bui,Min Kim,Hyoyoung Lee
标识
DOI:10.1002/anie.202114160
摘要
Amorphization of the support in single-atom catalysts is a less researched concept for promoting catalytic kinetics through modulating the metal-support interaction (MSI). We modeled single-atom ruthenium (RuSAs ) supported on amorphous cobalt/nickel (oxy)hydroxide (Ru-a-CoNi) to explore the favorable MSI between RuSAs and the amorphous skeleton for the alkaline hydrogen evolution reaction (HER). Differing from the usual crystal counterpart (Ru-c-CoNi), the electrons on RuSAs are facilitated to exchange among local configurations (Ru-O-Co/Ni) of Ru-a-CoNi since the flexibly amorphous configuration induces the possible d-d electron transfer and medium-to-long range p-π orbital coupling, further intensifying the MSI. This embodies Ru-a-CoNi with enhanced water dissociation, alleviated oxophilicity, and rapid hydrogen migration, which results in superior durability and HER activity of Ru-a-CoNi, wherein only 15 mV can deliver 10 mA cm-2 , significantly lower than the 58 mV required by Ru-c-CoNi.
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