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A Tensile‐Strained Pt–Rh Single‐Atom Alloy Remarkably Boosts Ethanol Oxidation
Author(s) -
Luo Shuiping,
Zhang Long,
Liao Yujia,
Li Lanxi,
Yang Qi,
Wu Xiaotong,
Wu Xiaoyu,
He Dongsheng,
He Chunyong,
Chen Wen,
Wu Qilong,
Li Mingrui,
Hensen Emiel J. M.,
Quan Zewei
Publication year - 2021
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202008508
Subject(s) - materials science , alloy , ultimate tensile strength , electrochemistry , catalysis , bimetallic strip , adsorption , chemical engineering , atom (system on chip) , density functional theory , nanotechnology , metallurgy , electrode , chemistry , computational chemistry , metal , organic chemistry , computer science , embedded system , engineering
The rational design and control of electrocatalysts at single‐atomic sites could enable unprecedented atomic utilization and catalytic properties, yet it remains challenging in multimetallic alloys. Herein, the first example of isolated Rh atoms on ordered PtBi nanoplates (PtBi‐Rh 1 ) by atomic galvanic replacement, and their subsequent transformation into a tensile‐strained Pt–Rh single‐atom alloy (PtBi@PtRh 1 ) via electrochemical dealloying are presented. Benefiting from the Rh 1 ‐tailored Pt (110) surface with tensile strain, the PtBi@PtRh 1 nanoplates exhibit record‐high and all‐round superior electrocatalytic performance including activity, selectivity, stability, and anti‐poisoning ability toward ethanol oxidation in alkaline electrolytes. Density functional theory calculations reveal the synergism between effective Rh 1 and tensile strain in boosting the adsorption of ethanol and key surface intermediates and the CC bond cleavage of the intermediates. The facile synthesis of the tensile‐strained single‐atom alloy provides a novel strategy to construct model nanostructures, accelerating the development of highly efficient electrocatalysts.