A 17.73 % Solar-To-Hydrogen Efficiency with Durably Active Catalyst in Stable Photovoltaic-Electrolysis Seawater System

被引：0

作者：

Gao, Yong ^{[1
]}

Xu, Yunyun ^{[2
]}

Guo, Hu ^{[3
]}

Li, Jingjing ^{[1
]}

Ding, Lingling ^{[1
]}

Wang, Tao ^{[1
]}

He, Jianping ^{[1
]}

Chang, Kun ^{[1
]}

Wu, Zhong-Shuai ^{[2
]}

机构：

[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Ctr Hydrogenergy, Nanjing 210016, Peoples R China

[2] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

[3] Nanjing Univ Sci & Technol, Sch New Energy, Nanjing 214400, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2025年

基金：

中国国家自然科学基金;

关键词：

WATER; ELECTROCATALYSTS;

D O I：

暂无

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing durably active catalysts to tackle harsh voltage polarization and seawater corrosion is pivotal for efficient solar-to-hydrogen (STH) conversion, yet remains a challenge. We report a durably active catalyst of NiCr-layered double hydroxide (RuldsNiCr-LDH) with highly exposed Ni-O-Ru units, in which low-loading Ru (0.32 wt %) is locked precisely at defect lattice site (Rulds) by Ni and Cr. The Cr site electron equilibrium reservoir and Cl- repulsion by intercalated CO32- ensure the highly durable activity of Ni-O-Ru units. The RuldsNiCr-LDH & Vert;RuldsNiCr-LDH electrolyzer based on anion exchange membrane water electrolysis (AEM-WE) shows ultrastable seawater electrolysis at 1000 mA cm-2. Employing RuldsNiCr-LDH both as anode and cathode, a photovoltaic-electrolysis seawater system achieves a 17.73 % STH efficiency, corresponding photovoltaic-to-hydrogen (PVTH) efficiency is 72.37 %. Further, we elucidate the dynamic evolutionary mechanism involving the interfacial water dissociation-oxidation, establishing the correlation between the dynamic behavior of interfacial water with the kinetics, activity of RuldsNiCr-LDH catalytic water electrolysis. Our work is a breakthrough step for achieving economically scalable production of green hydrogen.

引用

页数：10