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Photoenhanced Water Electrolysis in Separate O2and H2Cells Using Pseudocapacitive Electrodes
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Document Title
Photoenhanced Water Electrolysis in Separate O2and H2Cells Using Pseudocapacitive Electrodes
Author
Musikajaroen S., Polin S., Sattayaporn S., Jindata W., Saenrang W., Kidkhunthod P., Nakajima H., Butburee T., Chanlek N., Meevasana W.
Name from Authors Collection
Affiliations
Research Network NANOTEC-SUT on Advanced Nanomaterials and Characterization, School of Physics, Suranaree University of Technology, Nakhon Ratchasima, 30000, Thailand; Thailand Center of Excellence in Physics, Ministry of Higher Education, Science, Research and Innovation, 328 Si Ayutthaya Road, Bangkok, 10400, Thailand; Synchrotron Light Research Institute, Nakhon Ratchasima, 30000, Thailand; National Nanotechnology Center, National Science and Technology Development Agency, 111 Thailand Science Park, Pathum Thani, 12120, Thailand
Type
Article
Source Title
ACS Omega
ISSN
24701343
Year
2021
Volume
6
Issue
30
Page
19647-19655
Open Access
Gold, Green
Publisher
American Chemical Society
DOI
10.1021/acsomega.1c02305
Abstract
Water electrolysis has received much attention in recent years as a means of sustainable H2 production. However, many challenges remain in obtaining high-purity H2 and making large-scale production cost-effective. This study provides a strategy for integrating a two-cell water electrolysis system with solar energy storage. In our proposed system, CuO-Cu(OH)2/Cu2O was used as a redox mediator between oxygen and hydrogen evolution components. The system not only overcame the gas-mixing issue but also showed high gas generation performance. The redox reaction (charge/discharge) of CuO-Cu(OH)2/Cu2O led to a significant increase (51%) in the initial rate of H2 production from 111.7 μmol h-1 cm-2 in the dark to 168.9 μmol h-1 cm-2 under solar irradiation. The effects of light on the redox reaction of CuO-Cu(OH)2/Cu2O during water electrolysis were investigated by in situ X-ray absorption and photoemission spectroscopy. These results suggest that surface oxygen vacancies are created under irradiation and play an important role in increased capacitance and gas generation. These findings provide a new path to direct storage of abundant solar energy and low-cost sustainable hydrogen production. © 2021 The Authors. Published by American Chemical Society.
Funding Sponsor
Office of Naval Research Global; National Science and Technology Development Agency; National Nanotechnology Center
License
CC BY-NC-ND
Rights
Author
Publication Source
Scopus