A Robust PtNi Nanoframe/N-Doped Graphene Aerogel Electrocatalyst with Both High Activity and Stability

Jing Yang; René Hübner; Jiangwei Zhang; Hao Wan; Yuanyuan Zheng; Honglei Wang; Haoyuan Qi; Lanqi He; Yi Li; Amare Aregahegn Dubale; Yujing Sun; Yuting Liu; Daoling Peng; Yuezhong Meng; Zhikun Zheng; Jan Rossmeisl; Wei Liu

doi:10.1002/anie.202015679

A Robust PtNi Nanoframe/N-Doped Graphene Aerogel Electrocatalyst with Both High Activity and Stability

Angew Chem Int Ed Engl. 2021 Apr 19;60(17):9590-9597. doi: 10.1002/anie.202015679. Epub 2021 Mar 17.

Authors

Jing Yang¹, René Hübner², Jiangwei Zhang³, Hao Wan⁴, Yuanyuan Zheng¹, Honglei Wang⁵, Haoyuan Qi^{6

7}, Lanqi He⁵, Yi Li¹, Amare Aregahegn Dubale¹, Yujing Sun¹, Yuting Liu⁸, Daoling Peng⁸, Yuezhong Meng¹, Zhikun Zheng⁵, Jan Rossmeisl⁴, Wei Liu¹

Affiliations

¹ The Key Laboratory of Low-Carbon Chemistry & Energy Conservation of Guangdong Province, Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, State Key Laboratory of Optoelectronic Materials and Technologies, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
² Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, Bautzner Landstrasse 400, 01328, Dresden, Germany.
³ State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences (CAS), Dalian, 116023, P. R. China.
⁴ Center for High Entropy Alloy Catalysis (CHEAC), Department of Chemistry, University of Copenhagen, Universitetsparken 5, 2100, Copenhagen, Denmark.
⁵ Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Chemistry, and State Key Laboratory of Optoelectronic Materials and Technologies, Sun Yat-sen University, Guangzhou, 510275, P. R. China.
⁶ Center for Advancing Electronics Dresden (cfaed) and Faculty of Chemistry and Food Chemistry, Technical University of Dresden, 01069, Dresden, Germany.
⁷ Central Facility of Electron Microscopy, Electron Microscopy Group of Materials Science, Universität Ulm, 89081, Ulm, Germany.
⁸ School of Chemistry, South China Normal University, Guangzhou, 510006, China.

PMID: 33554402
DOI: 10.1002/anie.202015679

Abstract

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.

Abstract

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