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High‐Performance Bismuth‐Doped Nickel Aerogel Electrocatalyst for the Methanol Oxidation Reaction
Author(s) -
Dubale Amare Aregahegn,
Zheng Yuanyuan,
Wang Honglei,
Hübner René,
Li Yi,
Yang Jing,
Zhang Jiangwei,
Sethi Navpreet Kaur,
He Lanqi,
Zheng Zhikun,
Liu Wei
Publication year - 2020
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202004314
Subject(s) - aerogel , electrocatalyst , bismuth , methanol , materials science , methanol fuel , noble metal , chemical engineering , transition metal , catalysis , nickel , electron transfer , metal , inorganic chemistry , electrochemistry , chemistry , nanotechnology , photochemistry , metallurgy , electrode , organic chemistry , engineering
Low‐cost, non‐noble‐metal electrocatalysts are required for direct methanol fuel cells, but their development has been hindered by limited activity, high onset potential, low conductivity, and poor durability. A surface electronic structure tuning strategy is presented, which involves doping of a foreign oxophilic post‐transition metal onto transition metal aerogels to achieve a non‐noble‐metal aerogel Ni 97 Bi 3 with unprecedented electrocatalytic activity and durability in methanol oxidation. Trace amounts of Bi are atomically dispersed on the surface of the Ni 97 Bi 3 aerogel, which leads to an optimum shift of the d‐band center of Ni, large compressive strain of Bi, and greatly increased conductivity of the aerogel. The electrocatalyst is endowed with abundant active sites, efficient electron and mass transfer, resistance to CO poisoning, and outstanding performance in methanol oxidation. This work sheds light on the design of high‐performance non‐noble‐metal electrocatalysts.