Cited by 1,314Electrocatalysts for Energy ConversionFuel Cells and Related MaterialsCO2 Reduction Techniques and Catalysts

Enhanced Electron Penetration through an Ultrathin Graphene Layer for Highly Efficient Catalysis of the Hydrogen Evolution Reaction

Deng, Jiao, Ren, Pengju, Deng, Dehui, Bao, Xinhe·2015·Angewandte Chemie International Edition

Abstract

Major challenges encountered when trying to replace precious-metal-based electrocatalysts of the hydrogen evolution reaction (HER) in acidic media are related to the low efficiency and stability of non-precious-metal compounds. Therefore, new concepts and strategies have to be devised to develop electrocatalysts that are based on earth-abundant materials. Herein, we report a hierarchical architecture that consists of ultrathin graphene shells (only 1-3 layers) that encapsulate a uniform CoNi nanoalloy to enhance its HER performance in acidic media. The optimized catalyst exhibits high stability and activity with an onset overpotential of almost zero versus the reversible hydrogen electrode (RHE) and an overpotential of only 142 mV at 10 mA cm(-2) , which is quite close to that of commercial 40 % Pt/C catalysts. Density functional theory (DFT) calculations indicate that the ultrathin graphene shells strongly promote electron penetration from the CoNi nanoalloy to the graphene surface. With nitrogen dopants, they synergistically increase the electron density on the graphene surface, which results in superior HER activity on the graphene shells.

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Crossref · 10.1002/anie.201409524

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Authors
Deng, J., Ren, P., Deng, D., & Bao, X.
Affiliations
Dalian Institute of Chemical Physics (CN)
Corresponding author
  • Deng, Dehui
  • Bao, Xinhe
Venue
Angewandte Chemie International Edition
Publisher
Wiley
Published
2015-01-07
Volume
54
Issue
7
Pages
2100-2104
ISSN
  • 1433-7851 (ISSN-L)
  • 1521-3773
OpenAlex
W2119954940
Cited by
1,314
References
3
Citations by year
2026: 49 · 2025: 81 · 2024: 106 · 2023: 97 · 2022: 108 · 2021: 142 · 2020: 146 · 2019: 176 · 2018: 155 · 2017: 125 · 2016: 92 · 2015: 36
FWCI
40.26
Type
journal article
Language
en
Open access
closed
Locations
  • Angewandte Chemie International Edition (publishedVersion)
  • PubMed (publishedVersion)
  • Dalian Institute of Chemical Physics, CAS Institutional Repository (submittedVersion)
Funders
  • National Natural Science Foundation of China (21321002, 21033009, 21303191)
  • Strategic Priority Research Program of the Chinese Academy of Sciences (XDA09030100)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Fuel Cells and Related Materials
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
Keywords
hydrogen evolution reaction, non-precious metal electrocatalysts, acidic media, electron penetration, nitrogen doping, hierarchy, catalyst stability, earth-abundant catalysts

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