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A Robust PtNi Nanoframe/N‐Doped Graphene Aerogel Electrocatalyst with Both High Activity and Stability
Author(s) -
Yang Jing,
Hübner René,
Zhang Jiangwei,
Wan Hao,
Zheng Yuanyuan,
Wang Honglei,
Qi Haoyuan,
He Lanqi,
Li Yi,
Dubale Amare Aregahegn,
Sun Yujing,
Liu Yuting,
Peng Daoling,
Meng Yuezhong,
Zheng Zhikun,
Rossmeisl Jan,
Liu Wei
Publication year - 2021
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202015679
Subject(s) - electrocatalyst , chronoamperometry , cyclic voltammetry , aerogel , chemical engineering , graphene , electrolyte , catalysis , materials science , methanol , porosity , chemistry , electrochemistry , nanotechnology , electrode , organic chemistry , composite material , engineering
Insufficient catalytic activity and stability and high cost are the barriers for Pt‐based electrocatalysts in wide practical applications. Herein, a hierarchically porous PtNi nanoframe/N‐doped graphene aerogel (PtNiNF‐NGA) electrocatalyst with outstanding performance toward methanol oxidation reaction (MOR) in acid electrolyte has been developed via facile tert‐butanol‐assisted structure reconfiguration. The ensemble of high‐alloying‐degree‐modulated electronic structure and correspondingly the optimum MOR reaction pathway, the structure superiorities of hierarchical porosity, thin edges, Pt‐rich corners, and the anchoring effect of the NGA, endow the PtNiNF‐NGA with both prominent electrocatalytic activity and stability. The mass and specific activity (1647 mA mg Pt −1 , 3.8 mA cm −2 ) of the PtNiNF‐NGA are 5.8 and 7.8 times higher than those of commercial Pt/C. It exhibits exceptional stability under a 5‐hour chronoamperometry test and 2200‐cycle cyclic voltammetry scanning.