3D-Ni_(3)S_(2)微球电催化尿素氧化辅助制氢研究  

Electrocatalytic urea oxidation assisted hydrogen production by 3D-Ni_(3)S_(2)microspheres

作　　者：付鑫 蒋瑞懿 蒲博 明瑞奇 吕骞 田丽红[1] FU Xin;JIANG Ruiyi;PU Bo;MING Ruiqi;LYU Qian;TIAN Lihong(College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China)

机构地区：[1]湖北大学化学化工学院,湖北武汉430062

出　　处：《湖北大学学报（自然科学版）》2024年第6期784-791,共8页Journal of Hubei University：Natural Science

基　　金：国家自然科学基金(2018106011001006)资助。

摘　　要：电催化尿素氧化(UOR)替代动力学缓慢的析氧反应(OER)为高效制氢提供了新的思路。本研究通过简单的二次水热法制备了三维Ni_(3)S_(2)/NF微球催化剂(3D-Ni_(3)S_(2)/NF),由于独特的3D结构为UOR提供了高度开放的活性区域,并加快了电荷转移速率,3D-Ni_(3)S_(2)/NF表现出明显优于1D,2D-Ni_(3)S_(2)/NF电催化氧化尿素的活性。在1 mol L^(-1)KOH+0.33 mol L^(-1)尿素电解质溶液,3D-Ni_(3)S_(2)/NF电催化尿素氧化达到100 mA cm^(-2)的电流密度的电位仅需1.38 V vs.RHE,比OER电位减少了250 mV,同时在24 h稳定性测试中表现出良好的耐久性。此外,全尿素辅助制氢只需1.66 V即可达到50 mA cm^(-2),表现出比传统电解水(1.86 V)更低的电位。Electrocatalytic urea oxidation(UOR)is a promising alternative of kinetically slow oxygen evolution reaction(OER)for efficient hydrogen production.In this study,three-dimensional Ni_(3)S_(2)/NF microsphere catalysts(3D-Ni_(3)S_(2)/NF)was prepared by a simple two-step hydrothermal method.Due to the unique 3D structure providing a highly open active region and accelerating the charge transfer,3D-Ni_(3)S_(2)/NF exhibited significantly enhanced activity on UOR than 1D and 2D-Ni_(3)S_(2)/NF.In 1 mol L^(-1) KOH+0.33 mol L^(-1) urea electrolyte solution,3D-Ni_(3)S_(2)/NF only required the potential of 1.38 V vs.RHE to reach a current density of 100 mA·cm^(-2)for UOR reaction,which was 250 mV less than OER potential.Moreover,the catalyst exhibited a good durability in 24 h stability test.In addition,the all-urea electrolysis only needed 1.66 V vs.RHE to reach 50 mA·cm^(-2),demonstrating a lower potential than the traditional electrolytic water(1.86 V).

关 键 词：镍基催化剂 尿素氧化反应 电解水制氢 金属硫化物 

分 类 号：TQ426[化学工程]