Yolk-shell nanostructural Ni_(2)P/C composites as the high performance electrocatalysts toward urea oxidation  

作　　者：Yi Zhang Chundong Wang 

机构地区：[1]School of Optical and Electronic Information,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China [2]Key Laboratory of Green Chemical Process of Ministry of Education,Key Laboratory of Novel Reactor and Green Chemical Technology of Hubei Province,School of Chemical Engineering and Pharmacy,Wuhan Institute of Technology,Wuhan 430073,China [3]Key Laboratory of Nanodevices and Applications,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China

出　　处：《Chinese Chemical Letters》2021年第7期2222-2228,共7页中国化学快报（英文版）

基　　金：financially supported by the National Key Research and Development Program of China(No.2017YFE0120500);the National Natural Science Foundation of China(Nos.51804223 and 51972129);CAS Key Laboratory of Nano-Bio Interface(No.19ZY01);the South Xinjiang Innovation and Development Program of Key Industries of Xinjiang Production and Construction Corps(No.2020DB002);the Scientific Research Foundation of Wuhan Institute of Technology(No.K201761);the Fundamental Research Funds for the Central Universities(Nos.HUST 2018KFYYXJJ051,2019KFYXMBZ076);the Hubei"Chu-Tian Young Scholar"Program。

摘　　要：Highly active and low-cost catalytic electrodes for urea oxidation reaction(UOR)are always crucial for exploration of urea fuel cells.Herein,novel york-shell-structural Ni_(2)P/C na nosphere hybrids(Ni_(2)P/C-YS)are rationally constructed via a hydrothermal method and subsequent phosphidation treatment under different temperature ranging from 250℃to 450℃for UOR applications.In the in-situ constructed hollow york-shell structure,the coupling of conductive carbon materials and active Ni_(2)P allows numerous interfaces facilitating the electron transfer and thereby accelerating the catalytic kinetics.The results demonstrate that Ni_(2)P/C-YS-350 nanocomposite can boost the UOR process with a low potential of 1.366 V vs.RHE at a current density of 50 mA/cm^(2) in alkaline electrolyte and afford the superior durability with negligible potential decay after 23 h.This study presents that the carbon coated Ni_(2)P hybrid with the optimized crystallinities and hollow york-shell configurations can be a promising candidate for application in urea fuel cells.

关 键 词：Ni_(2)P/C Yolk-shell ELECTROCATALYSTS Urea oxidation Nanosphere 

分 类 号：O643.36[理学—物理化学] TM911.4[理学—化学]