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

Chinese Journal of Chemical Engineering 2022年第1期35卷 358-365页

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 School of Engineering Edith Cowan UniversityJoondalupWA 6027Australia College of Materials Science and Engineering Nanjing Forestry UniversityNanjing 210037China School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

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).

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

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