Cauliflower-like Ni3S2 foam for ultrastable oxygen evolution electrocatalysis in alkaline seawater
Qiuying Dai, Xun He, Yongchao Yao, Kai Dong, Xuwei Liu, Xiankun Guo, Jie Chen, Xiaoya Fan, Dongdong Zheng, Yongsong Luo, Shengjun Sun, Luming Li, Wei Chu, Asmaa Farouk, Mohamed S. Hamdy, Xuping Sun, Bo Tang
Abstract
It is of great importance to design and develop electrocatalysts that are both long-lasting and efficient for seawater oxidation. Herein, a three-dimensional porous cauliflower-like Ni3S2 foam on Ni foam (Ni3S2 foam/NF) is proposed as a high-performance electrocatalyst for the oxygen evolution reaction in alkaline seawater. The as-synthesis Ni3S2 foam/NF achieves exceptional efficacy, achieving a current density of 100 mA·cm−2 at mere overpotential of 369 mV. Notably, its electrocatalytic stability extends up to 1000 h at 500 mA·cm−2.
Topics & Concepts
ElectrocatalystSeawaterOxygen evolutionOxygenCatalysisChemistryChemical engineeringMaterials scienceInorganic chemistryOceanographyElectrochemistryElectrodeOrganic chemistryGeologyPhysical chemistryEngineeringElectrocatalysts for Energy ConversionAdvanced battery technologies researchFuel Cells and Related Materials