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

Journal of Materials Science & Technology 2024年第6期173卷 1-10页

作者： Han-Ming Zhang Lihao Zuo Yuhang Gao Junxia Guo Caizhen Zhu Jian Xu Jinfeng Sun School of Materials Science and Engineering Hebei University of Science and TechnologyShijiazhuangHebei 050018China Hebei Key Laboratory of Flexible Functional Materials ShijiazhuangHebei 0500180China Institute of Low-dimensional Materials Genome Initiative College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhenGuangdong 518060China

Designing and synthesizing cost-effective bifunctional catalysts for overall alkaline water/seawater splitting is still a huge challenge for hydrogen ***,Co/Ni/Fe/Mn based-amorphous high-entropy phosphoxide self-standing electrode(CNFMPO)is synthesized by the facile and fast electrodeposition *** exhibits excellent bifunctional electrocatalytic performances on alkaline water/seawater *** hydrogen evolution reaction(HER)and oxygen evolution reaction(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),***,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,*** exhibits satisfactory long-term stability on overall alkaline water/seawater splitting for the surface reconstruction into active metal hydroxide/(oxy)hydroxide,phosphite,and ***,no hypochlorite is detected during seawater electrolysis for the beneficial chlorite oxidation inhibition of the reconstructed phosphite and *** excellent catalytic performances of CNFMPO are due to the unique amorphous structure,multi-component synergistic effect,beneficial electronic structure modulation,and surface reconstruction during the catalytic reaction ***,CNFMPO has shown potential promotion to the development of the water/seawater splitting industry as a promising substituent for noble-metal *** work provides new insights into the design of efficient bifunctional catalysts for overall water/seawater splitting.

关键词： Amorphous high-entropy phosphoxides water/seawater splitting Synergistic effect Surface reconstruction Electronic structure modulation Inhibition of chloride oxidation reaction

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