Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/150365
Title: Elucidating the sources of activity and stability of FeP electrocatalyst for hydrogen evolution reactions in acidic and alkaline media
Authors: Zhao, Xin
Zhang, Zheng
Cao, Xun
Hu, Jun
Wu, Xinghua
Ng, Andrew Yun Ru
Lu, Guo-Ping
Chen, Zhong
Keywords: Engineering::Materials
Issue Date: 2019
Source: Zhao, X., Zhang, Z., Cao, X., Hu, J., Wu, X., Ng, A. Y. R., Lu, G. & Chen, Z. (2019). Elucidating the sources of activity and stability of FeP electrocatalyst for hydrogen evolution reactions in acidic and alkaline media. Applied Catalysis B: Environmental, 260, 118156-. https://dx.doi.org/10.1016/j.apcatb.2019.118156
Project: RG15/16
RG16/18
SINBERISE
Journal: Applied Catalysis B: Environmental
Abstract: In this study, we conduct comprehensive experimental and theoretical investigations on the hydrogen evolution reaction (HER) preformation of FeP electrode in acidic and alkaline solutions. Theoretically, bulk Fe-O bond is unfavorable, but surface Fe-O bond is favorable and plays a negative role for HER. The presence of oxygen bonds (native or formed during reaction) is the root source of the reduced HER activity. Surface treatment in 37% HCl solution removes the oxide layer and significantly improves the HER performance, especially in alkaline solution. After etching, the overpotentials in 0.5 M H2SO4 are 79 and 95 mV at 10 and 20 mA cm−2, respectively. The ones in 1 M KOH are 95 and 102 mV at 10 and 20 mA cm−2, respectively. Long-term instability in alkaline solution is caused by the presence of oxygen in the electrolyte. Good stability can be realized by removing oxygen from the solution.
URI: https://hdl.handle.net/10356/150365
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2019.118156
Rights: © 2019 Elsevier B.V. All rights reserved. This paper was published in Applied Catalysis B: Environmental and is made available with permission of Elsevier B.V.
Fulltext Permission: open
Fulltext Availability: With Fulltext
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