Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 60, Issue 17, Pages 9590-9597Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202015679
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Funding
- National Natural Science Foundation of China [51801238, 51803241, 51873236, 51803239, 21701168]
- Natural Science Foundation of Guangdong Province [2018A030313458]
- National Key Basic Research Program of China [2020YFA0406101]
- 100 Top Talents Program-Sun Yat-sen University
- Fundamental Research Funds for the Central Universities [19lgpy09]
- Dalian high level talent innovation project [2019RQ063]
- German Federal Ministry of Education of Research (BMBF) [03SF0451]
- Danish National Research Foundation centers of excellence [DNRF149]
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A hierarchically porous PtNi nanoframe/N-doped graphene aerogel electrocatalyst has been developed with outstanding performance toward methanol oxidation reaction, exhibiting exceptional stability and significantly higher activity compared to commercial Pt/C.
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.
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