Authors
Yumeng Li, Liang Qiu, Xiantong Zheng, Lin Yao, Muhammad Salman Nasir, Zijian Huang, Ying Li, Yixin Li, Ding Wang, Wenxing Yang, Jianyang Zang, Ping Wang, Xiaoyu Li, Xinqiang Wang, Zhen Huang, Baowen Zhou
Published in
Science bulletin. Aug 30, 2026. Epub Aug 30, 2026.
Abstract
Solar-driven natural seawater overall splitting presents a paradigm-shifting solution for hydrogen production to achieve global decarbonization. Herein, we present a noble-metal-free MnOx(OH)y/GaN nanowire photocatalyst grown on silicon that enables unbiased seawater overall splitting without sacrificial agents. Density functional theory calculations and in-situ spectroscopic characterizations reveal that MnOx(OH)y/GaN lowers the Coulomb attraction energy between photogenerated holes and electrons, thereby accelerating charge-transfer kinetics. Meanwhile, the decorated MnOx(OH)y facilitates the in-situ *OH and *OOH formation during water oxidation by photogenerated holes. More importantly, with the assistance of chloride species, the reaction energy barrier of water oxidation is significantly reduced. Additionally, a hydroxyl exchange mechanism between H2O and MnOx(OH)y further enhances the reaction kinetics. Collectively, the MnOx(OH)y/GaN hybrid photocatalyst achieves a high light-to-hydrogen efficiency of 6.15% and maintains stability over 360 min in natural seawater, delivering a distinct hydrogen evolution rate of 15.2 mol gMnOx(OH)y/GaN-1 h-1 (3.3 W cm-2). This work provides a promising strategy for efficient solar-driven seawater splitting by integrating earth-abundant materials, sunlight, and marine resources.
PMID:
42716886
Bibliographic data and abstract were imported from PubMed on 10 Sep 2026.
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