Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/164364
Title: Reconstruction of thiospinel to active sites and spin channels for water oxidation
Authors: Wu, Tianze
Sun, Yuanmiao
Ren, Xiao
Wang, Jiarui
Song, Jiajia
Pan, Yangdan
Mu, Yongbiao
Zhang, Jianshuo
Cheng, Qiuzhen
Xian, Guoyu
Xi, Shibo
Shen, Chengmin
Gao, Hong-Jun
Fisher, Adrian C.
Sherburne, Matthew P.
Du, Yonghua
Ager, Joel W.
Gracia, Jose
Yang, Haitao
Zeng, Lin
Xu, Jason Zhichuan
Keywords: Engineering::Materials
Issue Date: 2023
Source: Wu, T., Sun, Y., Ren, X., Wang, J., Song, J., Pan, Y., Mu, Y., Zhang, J., Cheng, Q., Xian, G., Xi, S., Shen, C., Gao, H., Fisher, A. C., Sherburne, M. P., Du, Y., Ager, J. W., Gracia, J., Yang, H., ...Xu, J. Z. (2023). Reconstruction of thiospinel to active sites and spin channels for water oxidation. Advanced Materials, 35(2), 2207041-. https://dx.doi.org/10.1002/adma.202207041
Project: MOE-T2EP10220-000
Journal: Advanced Materials
Abstract: Water electrolysis is a promising technique for carbon neutral hydrogen production. A great challenge remains at developing robust and low-cost anode catalysts. Many pre-catalysts are found to undergo surface reconstruction to give high intrinsic activity in the oxygen evolution reaction (OER). The reconstructed oxyhydroxides on the surface are active species and most of them outperform directly synthesized oxyhydroxides. The reason for the high intrinsic activity remains to be explored. Here, a study is reported to showcase the unique reconstruction behaviors of a pre-catalyst, thiospinel CoFe2 S4 , and its reconstruction chemistry for a high OER activity. The reconstruction of CoFe2 S4 gives a mixture with both Fe-S component and active oxyhydroxide (Co(Fe)Ox Hy ) because Co is more inclined to reconstruct as oxyhydroxide, while the Fe is more stable in Fe-S component in a major form of Fe3 S4 . The interface spin channel is demonstrated in the reconstructed CoFe2 S4 , which optimizes the energetics of OER steps on Co(Fe)Ox Hy species and facilitates the spin sensitive electron transfer to reduce the kinetic barrier of O-O coupling. The advantage is also demonstrated in a membrane electrode assembly (MEA) electrolyzer. This work introduces the feasibility of engineering the reconstruction chemistry of the precatalyst for high performance and durable MEA electrolyzers.
URI: https://hdl.handle.net/10356/164364
ISSN: 0935-9648
DOI: 10.1002/adma.202207041
Rights: © 2022 Wiley-VCH GmbH. All rights reserved. This is the peer reviewed version of the following article:Wu, T., Sun, Y., Ren, X., Wang, J., Song, J., Pan, Y., Mu, Y., Zhang, J., Cheng, Q., Xian, G., Xi, S., Shen, C., Gao, H., Fisher, A. C., Sherburne, M. P., Du, Y., Ager, J. W., Gracia, J., Yang, H., ...Xu, J. Z. (2023). Reconstruction of thiospinel to active sites and spin channels for water oxidation. Advanced Materials, 35(2), 2207041-, which has been published in final form at https://doi.org/10.1002/adma.202207041. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.
Fulltext Permission: embargo_20240119
Fulltext Availability: With Fulltext
Appears in Collections:MSE Journal Articles

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