4.7 Article

Photoelectrochemical performance of TiO2 nanotube arrays modified with Ni2P Co-catalyst

期刊

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 46, 期 7, 页码 4981-4991

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2020.11.037

关键词

Ni2P co-catalyst; Electrodeposition; Photogenerated electron-hole pairs; Carrier density

资金

  1. Shanxi Provincial National Science Foundation of China [201801D121099, 201903D421081]
  2. National Natural Science Foundation of China [22075197]

向作者/读者索取更多资源

This study presents a novel approach of constructing a-TNTAs/Ni2P composite photo-anode to enhance the efficiency of oxygen evolution, providing a simple and efficient method to promote the OER performance of optical semiconductors.
Solar-driven water splitting to produce hydrogen is an important solution to the problem of energy shortage and environmental pollution. The photolysis of water to produce hydrogen requires highly efficient and stable photocatalysts, and the anode used as catalyst for oxygen evolution is a bottleneck in this process. In this paper, the a-TNTAs/Ni2P composite photo-anode was constructed by electrodeposition to anchor the Ni2P cocatalyst for oxygen evolution at the active site of TiO2 nanotube arrays (TNTAs). The a- TNTAs/Ni2P delivered excellent oxygen evolution at a photocurrent density of 1.058 mA cm(2), an improvement of 2.78 times, 13.2 times, and 15.8 times over a-TNTAs, TNTAs/Ni2P, and TNTAs photo-anodes, respectively. The Mott-Schottky curve showed that Ni2P as co-catalyst for oxygen evolution accelerated the rates of separation and transfer of the photogenerated electrons. This research provides a simple and efficient method to promote the OER performance of optical semiconductors. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.

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