Enhanced electrocatalytic performance for H2O2 generation by boron-doped porous carbon hollow spheres

Zhaohui Wang; Zehan Sun; Kun Li; Keyi Fan; Tian Tian; Haomin Jiang; Honglei Jin; Ang Li; Yang Tang; Yanzhi Sun; Pingyu Wan; Yongmei Chen

iScience (Apr 2024)

Enhanced electrocatalytic performance for H2O2 generation by boron-doped porous carbon hollow spheres

Zhaohui Wang,
Zehan Sun,
Kun Li,
Keyi Fan,
Tian Tian,
Haomin Jiang,
Honglei Jin,
Ang Li,
Yang Tang,
Yanzhi Sun,
Pingyu Wan,
Yongmei Chen

Affiliations

Zhaohui Wang: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Zehan Sun: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China; State Key Laboratory of Fine Chemicals, School of Chemistry, Dalian University of Technology, Dalian 116024, P.R. China
Kun Li: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Keyi Fan: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Tian Tian: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Haomin Jiang: Center for Advanced Materials Research, College of Chemistry, Beijing Normal University, Zhuhai 519087, P.R. China
Honglei Jin: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Ang Li: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Yang Tang: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Yanzhi Sun: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Pingyu Wan: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China
Yongmei Chen: Institute of Applied Electrochemistry, College of Chemistry, Beijing University of Chemical Technology, Beijing 100029, P.R. China; Corresponding author

Journal volume & issue: Vol. 27, no. 4
p. 109553

Abstract

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Summary: Electrocatalytic generation of H2O2 via the 2-electron pathway of oxygen reduction reaction (2e-ORR) is an attractive technology compared to the anthraquinone process due to convenience and environmental friendliness. However, catalysts with excellent selectivity and high activity for 2e-ORR are necessary for practical applications. Reported here is a catalyst comprising boron-doped porous carbon hollow spheres (B-PCHSs) prepared using the hard template method coupled with borate transesterification. In an alkali electrolyte, the selectivity of B-PCHS for 2e-ORR above 90% in range of 0.4–0.7 VRHE and an onset potential of 0.833 V was obtained. Meanwhile, the generation rate of H2O2 reached 902.48 mmol h−1 gcat−1 at 0.4 VRHE under 59.13 mA cm−2 in batch electrolysis. The excellent catalytic selectivity of B-PCHS for 2e-ORR originates from the boron element, and the catalytic activity of B-PCHS for H2O2 generation is contributed to the morphology of porous hollow spheres, which facilitates mass transfer processes.

Published in iScience

ISSN: 2589-0042 (Online)
Publisher: Elsevier
Country of publisher: United States
LCC subjects: Science
Website: http://www.cell.com/iscience/home

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