多壳层中空镍钴双金属磷化物纳米球用于高效电催化析氧  

Multi-Shell Hollow Nickel-Cobalt Bimetallic Phosphide Nanospheres for Highly Efficient Oxygen Evolution Reaction

作　　者：曹维锦 白璐 武兰兰 李敬德 宋术岩[2] CAO Wei-Jin;BAI Lu;WU Lan-Lan;LI Jing-De;SONG Shu-Yan(School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China;State Key Laboratory of Rare Earth Research Utilization,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China)

机构地区：[1]河北工业大学化工学院,天津300130 [2]中国科学院长春应用化学研究所,稀土资源利用国家重点实验室,长春130022

出　　处：《应用化学》2022年第4期666-672,共7页Chinese Journal of Applied Chemistry

基　　金：国家自然科学基金(No.22001055);河北省自然科学基金(No.B2020202082);河北省高等学校科学技术研究项目(No.BJ2020050)资助。

摘　　要：析氧反应是金属-空气电池和电解水制氢等电化学系统中关键的反应,研究其高效稳定非贵金属电催化剂至关重要。本文以金属有机骨架化合物(MOF)作为前驱体,通过高温煅烧制备了具有多壳层中空结构的镍钴双金属磷化物(NiCo-P)。这种独特的结构有利于电解液的渗透,能够提供丰富的暴露活性位点和快速传质路径,同时,镍钴双金属具有协同作用促进电化学性能。结果表明,n(Ni)∶n(Co)=1∶10制备的NiCo-P-0.1催化剂在1.0 mol/L KOH电解液中表现出良好的催化活性和稳定性,在10 mA/cm^(2)电流密度的过电势为329 mV,具有良好的应用前景。本工作为高活性和高稳定性的电催化析氧催化剂的制备提供了一种全新途径。Oxygen evolution reaction(OER)is a key reaction in electrochemical systems such as metal-air batteries and hydrogen production by electrolysis of water.Research on high-efficiency and stable non-precious metal electrocatalysts is very important.In this paper,nickel-cobalt bimetallic phosphides(NiCo-P)with multi-shell hollow structures were prepared by high-temperature calcination with metal-organic framework(MOF)as precursors.The unique structure is conducive to the penetration of the electrolyte and mass transfer,and can provide a wealth of exposed active sites.At the same time,the nickel-cobalt bimetal has a synergistic effect to promote electrochemical performance.The results show that the NiCo-P-0.1 catalyst prepared with a molar ratio of nickel to cobalt of 0.1 exhibits good catalytic activity and stability in 1.0 mol/L KOH electrolyte,which has good application prospects.This work provides a brand new approach for the development of electrocatalytic oxygen evolution catalysts with highly activity and stability.

关 键 词：电催化剂 析氧反应 中空结构 双金属磷化物 

分 类 号：O611[理学—无机化学]