Improved Oxygen Evolution Kinetics and Surface States Passivation of Ni-Bi Co-Catalyst for a Hematite Photoanode

Ke Dang, Tuo Wang, Chengcheng Li, Jijie Zhang, Shanshan Liu, Jinlong Gong

Engineering ›› 2017, Vol. 3 ›› Issue (3) : 285-289.

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Engineering ›› 2017, Vol. 3 ›› Issue (3) : 285-289. DOI: 10.1016/J.ENG.2017.03.005
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Improved Oxygen Evolution Kinetics and Surface States Passivation of Ni-Bi Co-Catalyst for a Hematite Photoanode

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Abstract

This paper describes the combinational surface kinetics enhancement and surface states passivation of nickel-borate (Ni-Bi) co-catalyst for a hematite (Fe2O3) photoanode. The Ni-Bi-modified Fe2O3 photoanode exhibits a cathodic onset potential shift of 230 mV and a 2.3-fold enhancement of the photocurrent at 1.23 V, versus the reversible hydrogen electrode (RHE). The borate (Bi) in the Ni-Bi film promotes the release of protons for the oxygen evolution reaction (OER).

Keywords

Nickel-borate / Hematite / Oxygen evolution reaction / Co-catalyst

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Ke Dang, Tuo Wang, Chengcheng Li, Jijie Zhang, Shanshan Liu, Jinlong Gong. Improved Oxygen Evolution Kinetics and Surface States Passivation of Ni-Bi Co-Catalyst for a Hematite Photoanode. Engineering, 2017, 3(3): 285‒289 https://doi.org/10.1016/J.ENG.2017.03.005

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Acknowledgements

We acknowledge the National Key Research and Development Program of China (2016YFB0600901), the National Natural Science Foundation of China (21525626, U1463205, U1662111), the Specialized Research Fund for the Doctoral Program of Higher Education (20130032120018), and the Program of Introducing Talents of Discipline to Universities (B06006) for financial support.

Compliance with ethics guidelines

Ke Dang, Tuo Wang, Chengcheng Li, Jijie Zhang, Shanshan Liu, and Jinlong Gong declare that they have no conflict of interest or financial conflicts to disclose.

Supplementary Information

http://engineering.org.cn/EN/10.1016/J.ENG.2017.03.005
Experimental section
Figs. S1–S13
Table S1
Refs. [1–7]

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2017 2017 THE AUTHORS. Published by Elsevier LTD on behalf of the Chinese Academy of Engineering and Higher Education Press Limited Company. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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