Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/163067
Title: Promoting surface reconstruction of NiFe layered double hydroxide for enhanced oxygen evolution
Authors: Lei, Hang
Ma, Liang
Wan, Qixiang
Tan, Shaozao
Yang, Bo
Wang, Zilong
Mai, Wenjie
Fan, Hong Jin
Keywords: Science::Physics
Issue Date: 2022
Source: Lei, H., Ma, L., Wan, Q., Tan, S., Yang, B., Wang, Z., Mai, W. & Fan, H. J. (2022). Promoting surface reconstruction of NiFe layered double hydroxide for enhanced oxygen evolution. Advanced Energy Materials. https://dx.doi.org/10.1002/aenm.202202522
Project: A1983c0026
RG125/21
Journal: Advanced Energy Materials
Abstract: A dynamic surface reconstruction of oxide electrocatalysts in alkaline media is widely observed especially for layered double hydroxide (LDH), but little is known about how to promote the reconstruction toward desired surfaces for improved oxygen evolution reaction (OER). Here, surface reconstruction of NiFe LDH nanosheets is successfully induced to a higher degree via in situ sulfur doping than that by natural electrochemical activation. Theoretical calculations, operando Raman, and various ex situ characterizations reveal the S anion-induced effect can lower the energy barrier and facilitate the phase transformation into highly active S-doped oxyhydroxides. The generated S-NixFeyOOH can optimize the intermediate adsorption and facilitate the OER kinetics. The reconstructed S-oxyhydroxides catalyst presents superior OER activity and long-term durability compared to undoped ones. This work provides a structure–composition–activity relationship during the in situ surface restructuring of NiFe LDH pre-catalysts.
URI: https://hdl.handle.net/10356/163067
ISSN: 1614-6832
DOI: 10.1002/aenm.202202522
Rights: © 2022 Wiley-VCH GmbH. All rights reserved. This is the peer reviewed version of the following article: Lei, H., Ma, L., Wan, Q., Tan, S., Yang, B., Wang, Z., Mai, W. & Fan, H. J. (2022). Promoting surface reconstruction of NiFe layered double hydroxide for enhanced oxygen evolution. Advanced Energy Materials, which has been published in final form at https://doi.org/10.1002/aenm.202202522. 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_20231107
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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