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Solar water splitting for hydrogen generation using copper metal oxides (Conference Presentation)
Author(s): Jiangtian Li; Deryn Chu

Paper Abstract

Photoelectrochemical water splitting to generate hydrogen uses the renewable sources to meet the daily increasing energy demand. Lots of metal oxides have been investigated as photoanode in a photoelectrochemical cell, where hydrogen generation occurs on the metal counter electrode. Despite great efforts, the solar-to-hydrogen conversion efficiency is still not fully up to expectations. On the other side, p-type semiconductors can be employed to generate photoelectrons that directly reduce water on the photocathode to hydrogen. Copper based metal oxides, including binary and ternary oxides, represent a promising class of p-type semiconductors due to their low cost and abundance in the earth. From the perspective of photoelectrochemical energy applications, they typically have large photocurrent, higher conduction band level for large hydrogen evolution driving force, and very positive onset potentials as well. However, the fatal issues that copper-based metal oxides suffer are the stability and efficiency in the aqueous electrolyte solution. In our presentation, we will show our recent efforts in both experiment and theory to manipulate copper-based metal oxides from the perspectives of morphology, geometry and electronic band structure by passivating the surface, engineering electronic band structures, and optimizing hydrogen evolution co-catalysts with the aim to achieve the long-term photostability and improve the solar-to-hydrogen conversion efficiency. The resultant nanostructures could be used as photocathode in photoelectrochemical cell for solar hydrogen generation.

Paper Details

Date Published: 15 May 2018
Proc. SPIE 10663, Energy Harvesting and Storage: Materials, Devices, and Applications VIII, 1066307 (15 May 2018); doi: 10.1117/12.2304047
Show Author Affiliations
Jiangtian Li, U.S. Army Research Lab. (United States)
Deryn Chu, U.S. Army Research Lab. (United States)

Published in SPIE Proceedings Vol. 10663:
Energy Harvesting and Storage: Materials, Devices, and Applications VIII
Nibir K. Dhar; Palani Balaya; Achyut K. Dutta, Editor(s)

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