Urea electrooxidation-boosted hydrogen production on nitrogen-doped porous carbon nanorod-supported nickel phosphide nanoparticles  

作　　者：Xiaoyu Zhang Ge Ma Lingling Shui Guofu Zhou Xin Wang 

机构地区：[1]South China Academy of Advanced Optoelectronics&International Academy of Optoelectronics at Zhaoqing,South China Normal University,Guangzhou 510631,Guangdong,China

出　　处：《Journal of Energy Chemistry》2022年第9期88-96,I0003,共10页能源化学（英文版）

基　　金：the financial support from the Outstanding Youth Project of Guangdong Natural Science Foundation(Grant No.2021B1515020051);the Science and Technology Program of Guangzhou(2019050001);the Special Fund Project of Science and Technology Application in Guangdong(2017B020240002);the National 111 project。

摘　　要：Urea electro-oxidation reaction(UEOR)-boosted water electrolysis can supplant the kinetics-restricted oxygen evolution reaction(OER)and provide an energy-saving method of hydrogen generation.However,low UEOR activity and the poisoning issue of the catalyst limit its practical application.Herein,a simple coordination reaction is used to synthesize the dimethylglyoxime-NiⅡcomplex(DMGNiⅡ),which efficiently serves as the initial precursor to synthesize nitrogen-doped carbon nanorodsupported nickel phosphide nanoparticle(Ni_(2)P/N-C)nanocomposites.The density functional theory calculations and electrochemical results reveal that nitrogen doping can weaken the adsorption of hydrogen and the generated CO_(2)resulting in an enhancement of hydrogen evolution reaction(HER)and UEOR activity.In addition,N-doping can also promote the generation of Ni,which can further promote the UEOR and HER performance.Concretely,the overpotential for the HER on Ni_(2)P/N-C-2h nanocomposites is only 201 m V at 10 mA cm,and the onset potential of the UEOR on NiP/NC-2h nanocomposites is only 1.34 V.Additionally,the Ni_(2)P/N-Cnanocomposites also show excellent long-term stability due to the introduction of nitrogen-doped carbon material.Consequently,the symmetric Ni_(2)P/N-C-2h||Ni_(2)P/N-C-2h urea electrolyzer requires 1.41 V of electrolysis voltage for urea electrolysis,which can be applied in energy-saving H_(2) production and environment purification.

关 键 词：Electrochemical water splitting Nitrogen-doped carbon Nickel phosphide nanoparticles Urea oxidation reaction Electrolysis voltage 

分 类 号：TQ116.2[化学工程—无机化工] TQ426[一般工业技术—材料科学与工程] TB383.1