首页|Amorphous high-entropy phosphoxides for efficient overall alkaline water/seawater splitting

Amorphous high-entropy phosphoxides for efficient overall alkaline water/seawater splitting

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Designing and synthesizing cost-effective bifunctional catalysts for overall alkaline water/seawater split-ting is still a huge challenge for hydrogen production.Herein,Co/Ni/Fe/Mn based-amorphous high-entropy phosphoxide self-standing electrode(CNFMPO)is synthesized by the facile and fast elec-trodeposition method.CNFMPO exhibits excellent bifunctional electrocatalytic performances on alka-line water/seawater electrolysis.The hydrogen evolution reaction(HER)and oxygen evolution reac-tion(OER)overpotentials of CNFMPO in alkaline water/seawater are as low as 43/73 and 252/282 mV to reach a current density of 10 mA cm-2,respectively.Additionally,two-electrode electrolyzers with CNFMPO||CNFMPO successfully achieve the current density of 10 mA cm-2 at low voltages of 1.54 and 1.56 V for overall alkaline water/seawater splitting,respectively.CNFMPO exhibits satisfactory long-term stability on overall alkaline water/seawater splitting for the surface reconstruction into active metal hy-droxide/(oxy)hydroxide,phosphite,and phosphate.Moreover,no hypochlorite is detected during seawater electrolysis for the beneficial chlorite oxidation inhibition of the reconstructed phosphite and phosphate.The excellent catalytic performances of CNFMPO are due to the unique amorphous structure,multi-component synergistic effect,beneficial electronic structure modulation,and surface reconstruction dur-ing the catalytic reaction process.Therefore,CNFMPO has shown potential promotion to the development of the water/seawater splitting industry as a promising substituent for noble-metal electrocatalysts.This work provides new insights into the design of efficient bifunctional catalysts for overall water/seawater splitting.

Amorphous high-entropy phosphoxidesWater/seawater splittingSynergistic effectSurface reconstructionElectronic structure modulationInhibition of chloride oxidation reaction

Han-Ming Zhang、Lihao Zuo、Yuhang Gao、Junxia Guo、Caizhen Zhu、Jian Xu、Jinfeng Sun

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School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang,Hebei 050018,China

Hebei Key Laboratory of Flexible Functional Materials,Shijiazhuang,Hebei 0500180,China

Institute of Low-dimensional Materials Genome Initiative,College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen,Guangdong 518060,China

Natural Science Foundation of Hebei ProvinceCollege Students Innovation Training ProgramCollege Students Innovation Training Program

B2021208030202206224S2021113409001

2024

10.1016/j.jmst.2023.08.003

材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCD
影响因子：0.657
ISSN：1005-0302
年,卷(期)：2024.173(6)
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