贝壳状Ni3S2/NiMoP2异质结构电催化剂高效大电流密度电解水/尿素复合系统
Shell-shaped Ni3S2/NiMoP2 hetero-structure electrocatalyst for efficient water-urea electrolysis at high current density
摘要
Abstract
Water-urea electrolysis represents a promising avenue for nitrogen removal and efficient green hydrogen production from ammonia nitrogen wastewater.However,a key challenge,viz.,the lack of bifunctional electrocatalysts with exceptional activity and long-term current stability toward hydrogen evolution reaction(HER)and urea oxidation reaction(UOR),lies in this avenue.In this regard,a shell-shaped Ni3S2/NiMoP2 heterostructure was constructed on nickel foam(NF)by a hydrothermal method coupled with the gas phase phosphating.Thanks to its laminated heterogeneous nanostructure with abundant oxygen vacancy and efficient electron mass transfer,this catalyst displays excellent activity both in HER and in UOR,with an ultra-low potential of-0.205 and 1.423 V(vs.RHE),respectively,to achieve a large current density of 1000 mA/cm2.The dual-electrode water-urea system assembled with the bifunctional Ni3S2/NiMoP2 catalyst requires only 1.580 V to achieve a current density of 500 mA/cm2,which is 159 mV lower than that in the overall water splitting.Additionally,it exhibits great durability and can operate stably and continuously for up to 100 h under high current conditions.关键词
Ni3S2/MoNiP2/异质结构/电催化剂/尿素氧化/制氢Key words
Ni3S2/NiMoP2/hetero-structure/electrocatalyst/urea oxidation/hydrogen production分类
化学化工引用本文复制引用
王佳奕,庆绍军,童希立,项婷,张坤,徐良骥..贝壳状Ni3S2/NiMoP2异质结构电催化剂高效大电流密度电解水/尿素复合系统[J].燃料化学学报（中英文）,2025,53(1):116-127,12.基金项目
The project was supported by Scientific Research Foundation for High-level Talents of Anhui University of Science and Technology(2023yjrc51),the Department of Science and Technology of Anhui Province(2022h11020024),Anhui Construction Engineering Group Co.,Ltd(SG2025Q11),the Foundation of State Key Laboratory of Coal Conversion(J24-25-603),Basic Research Project from Institute of Coal Chemistry CAS(SCJC-HN-2022-17),Shanxi Province Science Foundation(20210302124446,202102070301018)and University Synergy Innovation Program of Anhui Province(GXXT-2022-27).安徽理工大学高层次引进人才科研启动基金(2023yjrc51),安徽省科技厅(2022h11020024),安徽建工集团有限公司(SG2025Q11),煤炭高效低碳利用全国重点实验室开放课题基金(J24-25-603),中国科学院山西煤炭化学研究所基础研究项目(SCJC-HN-2022-17),山西省科学基金(20210302124446,2012102070301018)和安徽省高校协同创新计划项目(GXXT-2022-27)资助 （2023yjrc51）
