Durable Seawater Electrolysis Enabled by Spherical Electrostatic Repulsion and Catalyst‐Support Interaction
Abstract
ABSTRACT The electrolysis of seawater driven by renewable energy for hydrogen production represents a promising strategy toward net‐zero emissions. The high concentration of chloride ions (Cl − ) in seawater not only competes with the oxygen evolution reaction (OER) at the anode but also causes corrosion of the catalyst material. The construction of electrostatic shielding via anions on the catalyst surface can repel Cl − . However, studies on regulating anion distribution through designed geometries to maximize such repulsion remain limited. Herein, a sphere‐like catalyst, constructed with a heterojunction of carbonate‐intercalated nickel‐iron layered double hydroxides in situ grown on malachite microspheres (MM), exhibits enhanced catalytic durability and activity. The spherical electrostatic field induced by carbonate anions protects the catalyst, and the catalyst‐support interaction (CSI) tunes the electronic structure of active sites to boost OER. Finally, the assembled electrolyzer demonstrates outstanding durability over 1000 h and a voltage of 1.83 V at a current density of 1 A per cm 2 . This spherical geometrical design of electrostatic protection offers insights into catalyst optimization for seawater electrolysis.
Article Details
Authors (12)
Hanqing Gao
National Laboratory of Solid State Microstructures (NLSSM) Collaborative Innovation Center of Advanced Microstructures Jiangsu Provincial Laboratory For Nanotechnology College of Engineering and Applied Sciences Nanjing University Nanjing China
Jinjue Zeng
National Laboratory of Solid State Microstructures (NLSSM) Collaborative Innovation Center of Advanced Microstructures Jiangsu Provincial Laboratory For Nanotechnology College of Engineering and Applied Sciences Nanjing University Nanjing China
Yifei Yang
Key Laboratory of Ocean Observation and Forecasting, Key Laboratory of Marine Geology and Environment, Institute of Oceanology, Chinese Academy of Sciences
Wei Sun
Peng Rao
State Key Laboratory of Tropic Ocean Engineering Materials and Materials Evaluation Hainan University Haikou China
Tianyu Qiu
Zhipeng Sun
State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping, Agronomy College, Henan Agricultural University
Dehong Yang
Wenjing Duan
National Laboratory of Solid State Microstructures (NLSSM) Collaborative Innovation Center of Advanced Microstructures Jiangsu Provincial Laboratory For Nanotechnology College of Engineering and Applied Sciences Nanjing University Nanjing China
Xiangfen Jiang
State Key Laboratory of Mechanics and Control of Mechanical Structures Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education College of Material Science and Technology Nanjing University of Aeronautics and Astronautics Nanjing China
Xinlong Tian
School of Marine Technology and Equipment, State Key Laboratory of Tropic Ocean Engineering Materials and Materials Evaluation, School of Chemistry and Chemical Engineering
Xuebin Wang