Cited by 40Electrocatalysts for Energy ConversionHydrogen Storage and MaterialsAdvanced Photocatalysis Techniques

Polymer-Mediated Self-Assembly of Amorphous Metal–Organic Complexes toward Fabrication of Three-Dimensional Graphene Supported CoP Nanoparticle-Embedded N-Doped Carbon as a Superior Hydrogen Evolution Catalyst

Wang, Xiaoyan, Fei, Yang, Wang, Wei, Yuan, Weiyong, Li, Chang Ming·2019·ACS Applied Energy Materials

Abstract

Hydrogen evolution catalysts with effectively integrated structures at different length scales are promising to remarkably boost the efficiency of the hydrogen evolution reaction (HER), but their fabrication presents great challenges. A 3-D structure of graphene oxide (GO) conformally coated with 2,2′-biquinoline-4,4′-dicarboxylate (BQ)-Co 2+ complexes is synthesized via polyvinylpyrrolidone (PVP)-mediated in situ self-assembly, in which PVP promotes attachment of BQ and Co 2+ and prevents the restacking of nanosheets, while formation of amorphous BQ-Co 2+ complexes allows their uniform growth. This structure is subsequently converted to 3-D graphene supported CoP NP-embedded N-doped carbon via calcination and low-temperature phosphidation and applied as a catalyst toward the HER. The onset overpotential, overpotenitial at 10 mA cm –2, Tafel slope, and exchange current density of this catalyst are 6.3 mV, 78.0 mV, 45.7 mV dec –1, and 0.3126 mA cm –2 (0.5 M H 2 SO 4 ), respectively, all of which compare favorably to those of most reported non-noble-metal-based catalysts, and the catalyst displays superior durability with a slight current increase after 23 h of chronoamperometric measurement or little current loss after 2000 CV cycles. This work develops a strategy to fabricate high-performance and low-cost HER catalysts and deepens the understanding of the mechanism of the polymer-mediated in situ self-assembly of amorphous metal–organic complexes.

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Crossref · 10.1021/acsaem.9b01861

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Authors
Wang, X., Fei, Y., Wang, W., Yuan, W., & Li, C. M.
Affiliations
  • Southwest University (CN)
  • The State Key Lab of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China
  • Singapore Institute of Manufacturing Technology (SG)
Corresponding author
Yuan, Weiyong
Venue
ACS Applied Energy Materials
Published
2019-11-20
Volume
2
Issue
12
Pages
8851-8861
ISSN
2574-0962 (ISSN-L)
OpenAlex
W2989769508
Cited by
40
References
63
Citations by year
2026: 1 · 2025: 5 · 2024: 7 · 2023: 7 · 2022: 6 · 2021: 10 · 2020: 3
FWCI
1.01
Type
journal article
Language
en
Open access
closed
Locations
ACS Applied Energy Materials (publishedVersion)
Funders
  • Ministry of Education of the People's Republic of China (XDJK2017B057)
  • Natural Science Foundation of Chongqing (cstc2015jcyjA50029)
  • Program for Innovation Team Building at Institutions of Higher Education in Chongqing (CXTDX201601011)
  • Entrepreneurship and Innovation Program for Chongqing Overseas Returned Scholars (cx2017061)
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Advanced Photocatalysis Techniques
Keywords
hydrogen evolution reaction, nitrogen-doped carbon, graphene oxide, phosphidation, non-noble metal electrocatalysts, catalyst stability

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