Crystalline-amorphous interfaces of NiO-CrO_(x)electrocatalysts for boosting the urea oxidation reaction  

作　　者：Xuejie Cao Tongzhou Wang Hongye Qin Guangliang Lin Lihua Zhao Lifang Jiao 

机构地区：[1]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Renewable Energy Conversion and Storage Center(RECAST),College of Chemistry,Nankai University,Tianjin 300071,China [2]Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China [3]Tianjin Renai College,Tianjin 301636,China

出　　处：《Nano Research》2023年第3期3665-3671,共7页纳米研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.52025013 and 22121005);the 111 Project(No.B12015),Haihe Laboratory of Sustainable Chemical Transformations,and the Fundamental Research Funds for the Central Universities.

摘　　要：The overall energy efficiency of electrochemical systems is severely hindered by the traditional anodic oxygen evolution reaction(OER).Utilizing urea oxidation reaction(UOR)with lower thermodynamic potential to replace OER provides a promising strategy to enhance the energy efficiency.Amorphous and heterojunctions electrocatalysts have been aroused extensive studies owing to their unique physicochemical properties and outperformed activity.Herein,we report a simple method to construct a novel crystalline-amorphous NiO-CrO_(x)heterojunction grown on Ni foam for UOR electrocatalyst.The NiO-CrO_(x)electrocatalyst displays excellent UOR performance with an ultralow working potential of 1.32 V at 10 mA·cm^(−2)and ultra-long stability about 5 days even at 100 mA·cm^(−2).In-situ Raman analysis and temperature-programmed desorption(TPD)measurement verify that the presence of the amorphous CrO_(x)phase can boost the reconstruction from NiO to active NiOOH species and enhance adsorption ability of urea molecule.Besides,the unique crystalline-amorphous interfaces are also benefit to improving the UOR performance.

关 键 词：NiO-CrO_(x) crystalline-amorphous interfaces electrochemical reconstruction urea oxidation reaction 

分 类 号：O64[理学—物理化学]