Controllable synthesis of a hollow Cr2O3 electrocatalyst for enhanced nitrogen reduction toward ammonia synthesis

作     者：Lei Shi Yu Yin Hong Wu Rajan Arjan Kalyan Hirani Xinyuan Xu Jinqiang Zhang Nasir Rafique Abdul Hannan Asif Shu Zhang Hongqi Sun Lei Shi;Yu Yin;Hong Wu;Rajan Arian Kalyan Hirani;Xinyuan Xu;Jinqiang Zhang;Nasir Rafique;Abdul Hannan Asif;Shu Zhang;Hongqi Sun

作者机构：School of EngineeringEdith Cowan UniversityJoondalupWA 6027Australia College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037China School of Environmental and Chemical EngineeringJiangsu University of Science and TechnologyZhenjiang 212003China 

出 版 物：《Chinese Journal of Chemical Engineering》 (中国化学工程学报（英文版）)

年 卷 期：2022年第35卷第1期

页      面：358-365页

核心收录：

学科分类：081702[工学-化学工艺] 081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 

基　　金：supported by Australian Research Council Discovery Projects(DP170104264 and DP190103548) 

主　　题：Hollow structure Electrocatalytic N_(2)fixation NH_(3)synthesis Template-assisted strategy Ambient condition 

摘      要：As a fascinating alternative to the energy-intensive Haber-Bosch process,the electrochemically-driven N_(2) reduction reaction(NRR)utilizing the N_(2) and H_(2)O for the production of NH3 has received enormous *** development and preparation of promising electrocatalysts are requisite to realize an efficient N_(2) conversion for NH3 *** this research,we propose a template-assisted strategy to construct the hollow electrocatalyst with controllable *** a paradigm,the hollow Cr_(2)O_(3) nanocatalyst with a uniform size(~170 nm),small cavity and ultrathin shell(~15 nm)is successfully fabricated with this *** promising hollow structure is favourable to trap N_(2) into the cavity,provides abundant active sites to accelerate the three-phase interactions,and facilitates the reactant transfer across the *** to these synergetic effects,the designed catalyst displays an outstanding behaviour in N_(2) fixation for NH3 production in ambient *** the neutral electrolyte of 0.1 mol·L^(-1) Na_(2)SO_(4),an impressive electrocatalytic performance with the NH3 generation rate of 2.72μg·h^(-1)·cm^(-2) and a high FE of 5.31%is acquired respectively at-0.85 V with the hollow Cr_(2)O_(3) *** by this work,it is highly expected that this approach could be applied as a universal strategy and extended to fabricating other promising electrocatalysts for realizing highly efficient nitrogen reduction reaction(NRR).