He, Lingyun and Zhou, Wu and Cai, Dongping and Mao, Samuel S. and Sun, Ke and Shen, Shaohua (2017) Pulsed laser-deposited n-Si/NiO_x photoanodes for stable and efficient photoelectrochemical water splitting. Catalysis Science and Technology, 7 (12). pp. 2632-2638. ISSN 2044-4753. doi:10.1039/c7cy00114b. https://resolver.caltech.edu/CaltechAUTHORS:20170526-095044384
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Abstract
An electrocatalytic and stable nickel oxide (NiO_x) thin layer was successfully deposited on an n-Si (100) substrate by pulsed laser deposition (PLD), acting as a photoanode for efficient photo-oxidation of water under solar illumination. It was revealed that the formed n-Si/NiO_x heterojunction with good Schottky contact could improve photogenerated charge separation, and thus n-Si photoanodes deposited with a 105 nm-thick NiO_x electrocatalytic layer exhibited a photovoltage of ∼350 mV, leading to greatly improved photoelectrochemical performances for water oxidation. The stability of the photoanode was significantly enhanced with the increasing thickness of NiO_x protective layers. This study demonstrates a simple and effective method to enable the use of planar n-Si (100) substrates as efficient and durable photoanodes for practical solar water oxidation.
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| Additional Information: | © 2017 The Royal Society of Chemistry. Received 19th January 2017; Accepted 14th May 2017; First published on 15 May 2017. The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (51672210, 51323011 and 51236007), the Program for New Century Excellent Talents in University (NCET-13-0455), the Natural Science Foundation of Shaanxi Province (2014KW07-02), the Natural Science Foundation of Jiangsu Province (BK 20141212) and the Nano Research Program of Suzhou City (ZXG201442). S. Shen is supported by the Foundation for the Author of National Excellent Doctoral Dissertation of P. R. China (201335), the National Program for Support of Top-notch Young Professionals, and the “Fundamental Research Funds for the Central Universities”. S. S. Mao acknowledges the support from the Shenzhen Peacock Plan (No. 1208040050847074). | ||||||||||||||||||||||||
| Group: | JCAP | ||||||||||||||||||||||||
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| Issue or Number: | 12 | ||||||||||||||||||||||||
| DOI: | 10.1039/c7cy00114b | ||||||||||||||||||||||||
| Record Number: | CaltechAUTHORS:20170526-095044384 | ||||||||||||||||||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:20170526-095044384 | ||||||||||||||||||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | ||||||||||||||||||||||||
| ID Code: | 77805 | ||||||||||||||||||||||||
| Collection: | CaltechAUTHORS | ||||||||||||||||||||||||
| Deposited By: | Tony Diaz | ||||||||||||||||||||||||
| Deposited On: | 26 May 2017 17:08 | ||||||||||||||||||||||||
| Last Modified: | 15 Nov 2021 17:34 |
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