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Unraveling the Function of Metal–Amorphous Support Interactions in Single‐Atom Electrocatalytic Hydrogen Evolution.

Authors :
Liu, Yang
Liu, Xinghui
Jadhav, Amol R.
Yang, Taehun
Hwang, Yosep
Wang, Hongdan
Wang, Lingling
Luo, Yongguang
Kumar, Ashwani
Lee, Jinsun
Bui, Huong T. D.
Gyu Kim, Min
Lee, Hyoyoung
Source :
Angewandte Chemie; 2/21/2022, Vol. 134 Issue 9, p1-10, 10p
Publication Year :
2022

Abstract

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00448249
Volume :
134
Issue :
9
Database :
Complementary Index
Journal :
Angewandte Chemie
Publication Type :
Academic Journal
Accession number :
155284196
Full Text :
https://doi.org/10.1002/ange.202114160