Coupling Co-Ni phosphides for energy-saving alkaline seawater splitting  

作　　者：Weijia Liu Wenxian Liu Tong Hou Junyang Ding Zhigui Wang Ruilian Yin Xingyuan San Ligang Feng Jun Luo Xijun Liu 

机构地区：[1]State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,Guangxi Key Laboratory of Processing for Nonferrous Metals and Featured Materials,MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China [2]College of Materials Science and Engineering,Zhejiang University of Technology,Hangzhou 310014,China [3]Hebei Key Laboratory of Optic-electronic Information and Materials,the College of Physics Science and Technology,Hebei University,Baoding 071002,China [4]School of Chemistry and Chemical Engineering,Yangzhou University,Yangzhou 225002,China [5]ShenSi Lab,Shenzhen Institute for Advanced Study,University of Electronic Science and Technology of China,Shenzhen 518110,China

出　　处：《Nano Research》2024年第6期4797-4806,共10页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.22075211 and 22275166);the Zhejiang Provincial Natural Science Foundation of China(No.LZ21E020003).

摘　　要：The coupling of energy-saving small molecule conversion reactions and hydrogen evolution reaction(HER)in seawater electrolytes can reduce the energy consumption of seawater electrolysis and mitigate chlorine corrosion issues.However,the fabrication of efficient multifunctional catalysts for this promising technology is of great challenge.Herein,a heterostructured catalyst comprising CoP and Ni_(2)P on nickel foam(CoP/Ni_(2)P@NF)is reported for hydrazine oxidation(HzOR)-assisted alkaline seawater splitting.The coupling of CoP and Ni_(2)P optimizes the electronic structure of the active sites and endows excellent electrocatalytic performance for HzOR and HER.Impressively,the two-electrode HzOR-assisted alkaline seawater splitting(OHzS)cell based on the CoP/Ni_(2)P@NF required only 0.108 V to deliver 100 mA·cm^(−2),much lower than 1.695 V for alkaline seawater electrolysis cells.Moreover,the OHzS cell exhibits satisfactory stability over 48 h at a high current density of 500 mA·cm^(−2).Furthermore,the CoP/Ni_(2)P@NF heterostructured catalyst also efficiently catalyzed glucose oxidation,methanol oxidation,and urea oxidation in alkaline seawater electrolytes.This work paves a path for high-performance heterostructured catalyst preparation for energy-saving seawater electrolysis for H_(2) production.

关 键 词：seawater splitting HETEROSTRUCTURE ELECTROCATALYSIS hydrazine oxidation reaction hydrogen evolution reaction 

分 类 号：O64[理学—物理化学]