A Robust PtNi Nanoframe/N-Doped Graphene Aerogel Electrocatalyst with Both High Activity and Stability
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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 mgPt−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.
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Angewandte Chemie - International Edition |
| Vol/bind | 60 |
| Udgave nummer | 17 |
| Sider (fra-til) | 9590-9597 |
| Antal sider | 8 |
| ISSN | 1433-7851 |
| DOI | |
| Status | Udgivet - 2021 |
Bibliografisk note
Funding Information:
Financial supports from the National Natural Science Foundation of China (51801238, 51803241, 51873236, 51803239, and 21701168), the Natural Science Foundation of Guangdong Province (2018A030313458), the National Key Basic Research Program of China (2020YFA0406101), the 100 Top Talents Program-Sun Yat-sen University, Fundamental Research Funds for the Central Universities (19lgpy09) and Dalian high level talent innovation project (2019RQ063) are gratefully acknowledged. Furthermore, the use of the HZDR Ion Beam Center TEM facilities and the funding of TEM Talos by the German Federal Ministry of Education of Research (BMBF; grant No. 03SF0451) in the framework of HEMCP are acknowledged. Besides, BL14W1 beamline of Shanghai Synchrotron Radiation Facility (SSRF) and 1W1B beamline of Beijing Synchrotron Radiation Facility (BSRF) are gratefully acknowledged for providing beamtime. The Center for High Entropy Alloys Catalysis is sponsored by the Danish National Research Foundation centers of excellence, Project DNRF149. The authors thank the XPS group from the surface and structure analysis platform of the Instrumental Analysis & Research Center, Sun Yat-sen University.
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