Cargando…

Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites

Electrochemical water oxidation enables the conversion of H(2)O to H(2)O(2). It holds distinct advantages to the O(2) reduction reaction, which is restricted by the inefficient mass transfer and limited solubility of O(2) in aqueous media. Nonetheless, most reported anodes suffer from high overpoten...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Lejing, Hu, Zhuofeng, Kang, Yongqiang, Cao, Shiyu, Xu, Liangpang, Yu, Luo, Zhang, Lizhi, Yu, Jimmy C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10076521/
https://www.ncbi.nlm.nih.gov/pubmed/37019917
http://dx.doi.org/10.1038/s41467-023-37007-9
_version_ 1785020141989265408
author Li, Lejing
Hu, Zhuofeng
Kang, Yongqiang
Cao, Shiyu
Xu, Liangpang
Yu, Luo
Zhang, Lizhi
Yu, Jimmy C.
author_facet Li, Lejing
Hu, Zhuofeng
Kang, Yongqiang
Cao, Shiyu
Xu, Liangpang
Yu, Luo
Zhang, Lizhi
Yu, Jimmy C.
author_sort Li, Lejing
collection PubMed
description Electrochemical water oxidation enables the conversion of H(2)O to H(2)O(2). It holds distinct advantages to the O(2) reduction reaction, which is restricted by the inefficient mass transfer and limited solubility of O(2) in aqueous media. Nonetheless, most reported anodes suffer from high overpotentials (usually >1000 mV) and low selectivity. Electrolysis at high overpotentials often causes serious decomposition of peroxides and leads to declined selectivity. Herein, we report a ZnGa(2)O(4) anode with dual active sites to improve the selectivity and resist the decomposition of peroxides. Its faradaic efficiency reaches 82% at 2.3 V versus RHE for H(2)O(2) generation through both direct (via OH(−)) and indirect (via HCO(3)(−)) pathways. The percarbonate is the critical species generated through the conversion of bicarbonate at Ga-Ga dual sites. The peroxy bond is stable on the surface of the ZnGa(2)O(4) anode, significantly improving faradaic efficiency.
format Online
Article
Text
id pubmed-10076521
institution National Center for Biotechnology Information
language English
publishDate 2023
publisher Nature Publishing Group UK
record_format MEDLINE/PubMed
spelling pubmed-100765212023-04-07 Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites Li, Lejing Hu, Zhuofeng Kang, Yongqiang Cao, Shiyu Xu, Liangpang Yu, Luo Zhang, Lizhi Yu, Jimmy C. Nat Commun Article Electrochemical water oxidation enables the conversion of H(2)O to H(2)O(2). It holds distinct advantages to the O(2) reduction reaction, which is restricted by the inefficient mass transfer and limited solubility of O(2) in aqueous media. Nonetheless, most reported anodes suffer from high overpotentials (usually >1000 mV) and low selectivity. Electrolysis at high overpotentials often causes serious decomposition of peroxides and leads to declined selectivity. Herein, we report a ZnGa(2)O(4) anode with dual active sites to improve the selectivity and resist the decomposition of peroxides. Its faradaic efficiency reaches 82% at 2.3 V versus RHE for H(2)O(2) generation through both direct (via OH(−)) and indirect (via HCO(3)(−)) pathways. The percarbonate is the critical species generated through the conversion of bicarbonate at Ga-Ga dual sites. The peroxy bond is stable on the surface of the ZnGa(2)O(4) anode, significantly improving faradaic efficiency. Nature Publishing Group UK 2023-04-05 /pmc/articles/PMC10076521/ /pubmed/37019917 http://dx.doi.org/10.1038/s41467-023-37007-9 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Li, Lejing
Hu, Zhuofeng
Kang, Yongqiang
Cao, Shiyu
Xu, Liangpang
Yu, Luo
Zhang, Lizhi
Yu, Jimmy C.
Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
title Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
title_full Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
title_fullStr Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
title_full_unstemmed Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
title_short Electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
title_sort electrochemical generation of hydrogen peroxide from a zinc gallium oxide anode with dual active sites
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10076521/
https://www.ncbi.nlm.nih.gov/pubmed/37019917
http://dx.doi.org/10.1038/s41467-023-37007-9
work_keys_str_mv AT lilejing electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT huzhuofeng electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT kangyongqiang electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT caoshiyu electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT xuliangpang electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT yuluo electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT zhanglizhi electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites
AT yujimmyc electrochemicalgenerationofhydrogenperoxidefromazincgalliumoxideanodewithdualactivesites