Cited by 42Electrocatalysts for Energy ConversionCO2 Reduction Techniques and CatalystsCatalytic Processes in Materials Science

Biochar aerogel-based electrocatalyst towards efficient oxygen evolution in acidic media

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Hui, Bin, Chen, Hongjiao, Zhou, Chengfeng, Cai, Liping, Zhang, Kewei, Quan, Fengyu, Yang, Dongjiang·2022·Biochar

Abstract

The controllable synthesis of oxygen evolution reaction (OER) electrocatalyst is an urgent need to advance the development of sustainable energy conversion and storage. However, the OER efficiency in acidic media is seriously hindered by slow reaction kinetics. The traditional acidic OER electrocatalysts are more prone to be oxidized and corroded as results of unstable carrier structures and variable electronic states of active species. Herein, a high-performing biochar aerogel (BA) based electrocatalyst were realistically designed and synthetized via joint utilization of the terrestrial lignin and seaweed polysaccharide as carbon sources. Originating from the induction effect of "egg-box" structure in alginate and the self-template effect of lignosulfonate, the BA decorated with Ru/RuS 2 particles was synthesized triumphantly. The as-synthesized electrocatalyst required a low overpotential of 228 mV to attain 10 mA cm−2 in 0.5 M H 2 SO 4 and exhibited a good stability for over 12,000 s. The good activity was strongly dependent on the assembled unique two-dimensional/three-dimensional (2D/3D) channels in carbon aerogels. Notably, the numerous defective sites at carbon could strongly interact with the Ru/RuS 2 heterojunction for remarkably enhancing the catalytic activity and stability of whole catalytic system in acidic media. This work puts forward a novel and effective strategy towards the enhancement of the acidic OER process by rational regulations of the BA and the coupling effect in micro-interface. Graphical Abstract

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Crossref · 10.1007/s42773-022-00163-0

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  • Biochar aerogels decorated with Ru/RuS2 have shown overpotentials around 228 mV for OER catalysis.

    “Meanwhile, biochar aerogels decorated with Ru/RuS2 have shown overpotentials around 228 mV for OER catalysis 49 .”
  • The observed HER performance places the RP+cg+Fe2-CVD aerogel within the range of recently reported biomass-derived carbon electrocatalysts.

    “The observed HER performance (η10 = 408 mV at -10 mA cm -2 ) places the RP+cg+Fe2-CVD aerogel within the range of recently reported biomass-derived carbon electrocatalysts.”

    From Boosting hydrogen production with raspberry-derived carbon aerogels with <i>in situ</i> grown carbon nanotubes (2026) · cites this paper as [49]

    The Electrochemical performances evaluation section describes OER tests, and the Conclusions report a 228 mV overpotential for the paper’s Ru/RuS₂ biochar aerogel in acidic OER. I searched for the RP+cg+Fe2-CVD aerogel, its 408 mV HER result, and a comparison with recently reported biomass-derived carbon HER electrocatalysts; our copy does not address that comparison. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Authors
Hui, B., Chen, H., Zhou, C., Cai, L., Zhang, K., Quan, F., & Yang, D.
Affiliations
  • Qingdao University (CN)
  • University of North Texas (US)
Corresponding author
  • Hui, Bin
  • Yang, Dongjiang
Venue
Biochar
Published
2022-07-22
Volume
4
Issue
1
ISSN
  • 2524-7867 (ISSN-L)
  • 2524-7972
OpenAlex
W4286487929
Cited by
40
References
53
Citations by year
2026: 4 · 2025: 11 · 2024: 8 · 2023: 13 · 2022: 4
FWCI
1.62
Type
journal article
Language
en
Open access
Locations
  • Biochar (publishedVersion, cc-by)
  • University of North Texas Digital Library (University of North Texas) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Natural Science Foundation of China (32101451)
  • Natural Science Foundation of Shandong Province (ZR2019BC007)
  • Postdoctoral Research Foundation of China (2018M632626)
  • State Key Laboratory of Bio-Fibers and Eco-Textiles (ZKT31)
  • Taishan Scholar Foundation of Shandong Province
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › CO2 Reduction Techniques and Catalysts
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
Keywords
oxygen evolution reaction, acidic electrocatalysts, lignin, seaweed polysaccharides, alginate, lignosulfonate, carbon defects, electrocatalyst stability, renewable carbon sources

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