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Research Article

Highly dispersed Ag clusters for active and stable hydrogen peroxide production

Mengmeng Jin1,2,§, Wei Liu2,§, Jiaqiang Sun3, Xinzhong Wang1( ), Shusheng Zhang4, Jun Luo2( ), Xijun Liu5( )
Information Technology Research Institute, Shenzhen Institute of Information Technology, Shenzhen 518172, China
Institute for New Energy Materials and Low-Carbon Technologies, Tianjin Key Lab for Photoelectric Materials & Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China
College of Chemistry, Zhengzhou University, Zhengzhou 450000, China
MOE Key Laboratory of New Processing Technology for Non-Ferrous Metals and Materials, and Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, School of Resource, Environments and Materials, Guangxi University, Nanning 530004, China

§ Mengmeng Jin and Wei Liu contributed equally to this work.

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Graphical Abstract

N-doped hollow carbon spheres supported Ag nanoclusters (NC-Ag/NHCS) were first reported as an efficient catalyst towards the H2O2 electrosynthesis in acidic medium. The catalyst delivers a high H2O2 selectivity of 89%–91% (0.2–0.7 V), a kinetic mass activity of 27.1 A·g−1 , and H2O2 productivity of 408 mmol·gcat.−1·h−1 at 0.7 V, comparable with the best-reported results.

Abstract

The electrosynthesis of hydrogen peroxide (H2O2) from oxygen reduction reaction (ORR) via a two-electron pathway provides an appealing alternative to the energy-intensive anthraquinone route; however, the development of ORR with high selectivity and durability for H2O2 production is still challenging. Herein, we demonstrate an active and stable catalyst, composing of highly dispersed Ag nanoclusters on N-doped hollow carbon spheres (NC-Ag/NHCS), which can effectively reduce O2 molecules into H2O2 with a selectivity of 89%–91% in a potential range from 0.2 to 0.7 V (vs. reversible hydrogen electrode (RHE)) in acidic media. Strikingly, NC-Ag/NHCS achieve a mass activity of 27.1 A·g−1 and a yield rate of 408 mmol·gcat.−1·h−1 at 0.7 V, both of which are comparable with the best-reported results. Furthermore, NC-Ag/NHCS enable catalyzing H2O2 production with a stable current density over 48-h electrolysis and only about 9.8% loss in selectivity after 10,000 cycles. Theoretical analyses indicate that Ag nanoclusters can contribute more electrons to favor the protonation of adsorbed O2, thus leading to a high H2O2 selectivity. This work confirms the great potential of metal nanocluster-based materials for H2O2 electrosynthesis under ambient conditions.

Keywords

hydrogen peroxide synthesiselectrochemical routeAg nanoclustersoxygen reduction reactionenergy-efficient

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Nano Research
Volume 15 Issue 7,
July 2022
Pages 5842-5847
DOI: 10.1007/s12274-022-4208-7
Cite this article:
Jin M, Liu W, Sun J, et al. Highly dispersed Ag clusters for active and stable hydrogen peroxide production. Nano Research, 2022, 15(7): 5842-5847. https://doi.org/10.1007/s12274-022-4208-7
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Received: 27 December 2021
Revised: 29 January 2022
Accepted: 29 January 2022
Published: 10 March 2022
© Tsinghua University Press 2022
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