血小板状Ru掺杂Ni2P纳米催化剂的合成及其双功能电催化析氢和析氧性能  

Synthesis and Electrocatalytic Bifunctionality for Hydrogen and Oxygen Evolution of Platelet-like Ru-Doped Ni2P Nanocatalyst

作　　者：刘影 陆徐云 车志文 王伟 包建春[1] LIU Ying;LU Xu-Yun;CHE Zhi-Wen;WANG Wei;BAO Jian-Chun(College of Chemistry and Materials Science,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学化学与材料科学学院,南京210023

出　　处：《无机化学学报》2020年第6期1085-1092,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21533012);江苏高校优势学科建设工程项目资助。

摘　　要：采用简单的一锅法制备了血小板状Ru掺杂Ni2P纳米片催化剂。金属Ru的引入不但显著增强了催化剂的电子传输性能,而且导致血小板状纳米片表面产生了大量阶梯/位错缺陷;此外,电催化活性位点测试表明Ru和Ni2P均是电催化的有效活性组分。这些因素共同促进了电催化析氢(HER)和析氧反应(OER)过程。对于HER,该催化剂表现出明显优于单一Ni2P和Ru且接近商用20%(w/w)Pt/C催化剂的初始电位(35 mV)和Tafel斜率(34 mV·dec-1)以及长久的稳定性(3 000圈)。对于OER,该催化剂表现出优于Ni2P、Ru、20%Pt/C且接近商用IrO2催化剂的初始电位(1.54 V)和过电势η10(0.49 V)。This work reports a platelet-like Ru-doped Ni2P nanosheet catalyst which was prepared by a simple one-pot method.The introduction of Ru not only significantly enhances the electron transport property of the catalyst,but also contributes to platelet-like morphology which causes a large number of step and dislocation defects on the catalyst surface;in addition,electrochemical tests reveal that both Ru and Ni2P are effective active components for electrocatalysis.These factors jointly enhance the electrocatalytic hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)performances of the Ru-doped Ni2P catalyst.For HER,the Ru-doped Ni2P catalyst shows superior onset potential(35 mV),Tafel slope(34 mV·dec-1)and long-term cycling stability(3000 cycles),superior than that of the individual Ni2P,Ru and close to the commercial 20%Pt/C catalyst.For OER,the Ru-doped Ni2P catalyst displays a small onset potential of 1.54 V and overpotential(η10)of 0.49 V,superior to the Ni2P,Ru,20%Pt/C,and close to the commercial IrO2 catalyst.

关 键 词：氢气 氧气 掺杂 钌 磷化镍 电化学 

分 类 号：O643.36[理学—物理化学]