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

This paper describes the combinational surface kinetics enhancement and surface states passivation of nickel-borate （Ni-Bi） co-catalyst for a hematite （Fe_2O_3） photoanode. The Ni-Brmodified Fe_2O_3 photoanode exhibits a cathodic onset potential shift of 230 mV and a 2.3-fold enhancement of the phot...

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Bibliographic Details
Published in:Engineering (Beijing, China) China), 2017-06, Vol.3 (3), p.285-289
Main Authors: Dang, Ke, Wang, Tuo, Li, Chengcheng, Zhang, Jijie, Liu, Shanshan, Gong, Jinlong
Format: Article
Language:English
Subjects:
Co-catalyst
Hematite
Nickel-borate
Oxygen evolution reaction
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Summary:This paper describes the combinational surface kinetics enhancement and surface states passivation of nickel-borate （Ni-Bi） co-catalyst for a hematite （Fe_2O_3） photoanode. The Ni-Brmodified Fe_2O_3 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 pro- tons for the oxygen evolution reaction （OER）.
ISSN:2095-8099
DOI:10.1016/J.ENG.2017.03.005