Artificial photosynthesis, the process of producing green hydrogen via photoelectrochemical water splitting, requires the development of highly efficient and stable photoelectrodes. However, photoelectrode development is associated with critical challenges. Herein, we develop a reconfiguration strategy for platinum single-atom catalysts anchored on a cupric oxide/copper heterostructure foam to yield a highly active hydrogen evolution reaction. A cupric oxide/copper heterostructure foam fabricated by a simple chemical oxidation process has high carrier accessibility and abundant electrolyte diffusion pathways. Moreover, its catalytic activity is well maintained, which favors hydrogen production. Additionally, inserting platinum single-atom catalysts reduces the number of precious metals required while ensuring catalytic activity. The proposed photoelectrode enables an impressive hydrogen production of 59.2 μmolh−1cm−2 under 1 sun illumination. This study provides a facile strategy to impart an outstanding surface geometry for platinum single-atom catalysts coupled with a cupric oxide/copper heterostructure foam, which can serve as a photocatalyst for accelerating hydrogen evolution reactions.
Bibliographical noteFunding Information:
In-Hwan Lee received his Ph.D. degree in materials science and engineering from Korea University, Korea in 1997. During 1997–1999, he was a postdoctoral fellow at Northwestern University. From 2002–2017, he was a faculty member at School of Advanced Materials Engineering, Chonbuk National University, Korea. With the sabbatical grant from LG foundation, he was at Yale University during 2008–2009. In 2017, he joined Department of Materials Engineering, Korea University, Korea as a full professor. His current research focuses on the development of nanotechnology-inspired novel optoelectronic devices including micro/nano LEDs, photovoltaic devices, sensors, and photocatalysts.
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government ( MSIT ) ( NRF-2021R1I1A1A01052103 , 2021M3H4A1A02051284 ).
© 2023 Elsevier Ltd
- Artificial photosynthesis
- CuO photoelectrode
- Hydrogen production
- Nano architecture
- Single atom catalyst
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- General Materials Science
- Electrical and Electronic Engineering