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Spatial decoupling strategy boosted alkaline hydrogen evolution for an efficient solar-driven AEM electrolyzer.
- Source :
- Journal of Materials Chemistry A; 8/28/2024, Vol. 12 Issue 32, p21106-21113, 8p
- Publication Year :
- 2024
-
Abstract
- Electrolytic water splitting using renewable energy sources, such as solar power, provides a green and sustainable approach for hydrogen production. Anion exchange membrane (AEM) electrolyzers present substantial commercial prospects; however, the rate of hydrogen evolution reaction (HER) in alkaline electrolytes is limited by the water dissociation step. In this work, we fabricated an N-doped Ni substrate for loading ultrafine Pt nanoparticles, realizing spatial decoupling of the reaction process to break the limitation of water dissociation, where the N-doped Ni substrate and Pt nanoparticles facilitate the supply of ample H* and H<subscript>2</subscript> release, respectively. The prepared Pt–N–Ni/NC with extremely low Pt loading (1.0 wt%) requires only 15 and 149 mV overpotentials to reach current densities of 10 and 1000 mA cm<superscript>−2</superscript>, respectively. When assembled into an AEM electrolyzer, the system requires a cell voltage of only 1.75 V to achieve a current density of 1000 mA cm<superscript>−2</superscript>. Notably, the solar-driven AEM electrolyzer demonstrates a current density of 1390 mA cm<superscript>−2</superscript> with a solar-to-hydrogen efficiency (STH) of 8.27%. This study proposes a strategy to achieve efficient utilization and performance improvement of precious metals, promoting the development of efficient green hydrogen production. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 12
- Issue :
- 32
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 178994002
- Full Text :
- https://doi.org/10.1039/d4ta03872j