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Qin DD, He CH, Li Y, Trammel AC, Gu J, Chen J, Yan Y, Shan DL, Wang QH, Quan JJ, Tao CL, Lu XQ. Fe 2 PO 5 -Encapsulated Reverse Energetic ZnO/Fe 2 O 3 Heterojunction Nanowire for Enhanced Photoelectrochemical Oxidation of Water. CHEMSUSCHEM 2017; 10:2796-2804. [PMID: 28570775 DOI: 10.1002/cssc.201700501] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Zinc oxide is regarded as a promising candidate for application in photoelectrochemical water oxidation due to its higher electron mobility. However, its instability under alkaline conditions limits its application in a practical setting. Herein, we demonstrate an easily achieved wet-chemical route to chemically stabilize ZnO nanowires (NWs) by protecting them with a thin layer Fe2 O3 shell. This shell, in which the thickness can be tuned by varying reaction times, forms an intact interface with ZnO NWs, thus protecting ZnO from corrosion in a basic solution. The reverse energetic heterojunction nanowires are subsequently activated by introducing an amorphous iron phosphate, which substantially suppressed surface recombination as a passivation layer and improved photoelectrochemical performance as a potential catalyst. Compared with pure ZnO NWs (0.4 mA cm-2 ), a maximal photocurrent of 1.0 mA cm-2 is achieved with ZnO/Fe2 O3 core-shell NWs and 2.3 mA cm-2 was achieved for the PH3 -treated NWs at 1.23 V versus RHE. The PH3 low-temperature treatment creates a dual function, passivation and catalyst layer (Fe2 PO5 ), examined by X-ray photoelectron spectroscopy, TEM, photoelectrochemical characterization, and impedance measurements. Such a nano-composition design offers great promise to improve the overall performance of the photoanode material.
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Affiliation(s)
- Dong-Dong Qin
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Cai-Hua He
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Yang Li
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Antonio C Trammel
- Department of Chemistry & Biochemistry, San Diego State University, San Diego, CA, 92182, USA
| | - Jing Gu
- Department of Chemistry & Biochemistry, San Diego State University, San Diego, CA, 92182, USA
| | - Jing Chen
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Yong Yan
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, New Jersey, 07102, USA
| | - Duo-Liang Shan
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Qiu-Hong Wang
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Jing-Jing Quan
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
| | - Chun-Lan Tao
- School of Physical Science and Technology, Lanzhou University, Lanzhou, Gansu, 730000, P. R. China
| | - Xiao-Quan Lu
- Key Lab of Bioelectrochemistry and Environmental Analysis of Gansu, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, P. R. China
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Khoshmashrab S, Turnbull MJ, Vaccarello D, Nie Y, Martin S, Love DA, Lau PK, Sun X, Ding Z. Effects of Cu content on the photoelectrochemistry of Cu 2 ZnSnS 4 nanocrystal thin films. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2014.12.173] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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