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http://hdl.handle.net/10397/94264
Title: | Electrochemical oxygen reduction to hydrogen peroxide at practical rates in strong acidic media | Authors: | Zhang, X Zhao, X Zhu, P Adler, Z Wu, ZY Liu, Y Wang, H |
Issue Date: | 2022 | Source: | Nature communications, 2022, v. 13, 2880 | Abstract: | Electrochemical oxygen reduction to hydrogen peroxide (H2O2) in acidic media, especially in proton exchange membrane (PEM) electrode assembly reactors, suffers from low selectivity and the lack of low-cost catalysts. Here we present a cation-regulated interfacial engineering approach to promote the H2O2 selectivity (over 80%) under industrial-relevant generation rates (over 400 mA cm−2) in strong acidic media using just carbon black catalyst and a small number of alkali metal cations, representing a 25-fold improvement compared to that without cation additives. Our density functional theory simulation suggests a “shielding effect” of alkali metal cations which squeeze away the catalyst/electrolyte interfacial protons and thus prevent further reduction of generated H2O2 to water. A double-PEM solid electrolyte reactor was further developed to realize a continuous, selective (∼90%) and stable (over 500 hours) generation of H2O2 via implementing this cation effect for practical applications. | Publisher: | Nature Publishing Group | Journal: | Nature communications | EISSN: | 2041-1723 | DOI: | 10.1038/s41467-022-30337-0 | Rights: | © The Author(s) 2022 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/. The following publication Zhang, X., Zhao, X., Zhu, P., Adler, Z., Wu, Z. Y., Liu, Y., & Wang, H. (2022). Electrochemical oxygen reduction to hydrogen peroxide at practical rates in strong acidic media. Nature Communications, 13, 2880 is available at https://doi.org/10.1038/s41467-022-30337-0 |
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