@article{Ma2026, 
author = {Xiaoqing Ma and Yuzhe Cao and Zunhua Ke and Zhiwen Cao and Zhao Cai and Bo Han},
title = {Semi-metallic hydroxide supported single-atom catalysts for sustainable water oxidation},
year = {2026},
journal = {Environmental Chemistry and Safety},
keywords = {Single-atom catalyst, electronic conductivity, Semi-metallic hydroxide, oxygen evolution reaction.},
url = {https://www.sciopen.com/article/10.26599/ECS.2026.9600029},
doi = {10.26599/ECS.2026.9600029},
abstract = {Developing efficient electrocatalysts towards water oxidation is of critical importance for numerous environmental and energy technologies. Single-atom catalysts have been widely recognized as a promising route, they are however often anchored on semiconducting substrates such as hydroxides, which inherently limits the electrical conductivity and overall catalytic efficiency. In this work, single-atom Ru catalysts are immobilized on a semi-metallic layered double hydroxide substrate (Ru-SM LDH) to achieve highly efficient water oxidation. The as-designed Ru-SM LDH catalyst displayed an overpotential of 270 mV to deliver an oxygen evolution reaction (OER) current density of 100 mA cm−2, which was 60 mV lower than that of commercial RuO2. In-situ electrochemical impedance spectroscopy revealed that Ru-SM LDH exhibited a reduced solution resistance and diminished charge transfer resistance during catalysis, leading to the enhanced OER performance. An electrolyzer assembled with Ru-SM LDH anode and commercial Ni mesh cathode achieved a water electrolysis current density of 400 mA cm−2 at 1.65 V and demonstrated exceptional stability for 1000 h, surpassing that of Ni||Ni electrolyzer (1.92 V, 350 h). These findings established the design of single-atom catalysts supported on semi-metallic hydroxide substrates as a robust pathway toward efficient water electrolysis catalysts.}
}