Efficient photothermal CO_(2) methanation over Ni Fe alloy nanoparticles with enhanced localized surface plasmon resonance effect  

作　　者：Jiarong Li Qi Xu Yaoyao Han Zhiyong Guo Liangqun Zhao Kang Cheng Qinghong Zhang Ye Wang 

机构地区：[1]State Key Laboratory of Physical Chemistry of Solid Surfaces,Collaborative Innovation Center of Chemistry for Energy Materials,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [2]Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361005,China

出　　处：《Science China Chemistry》2023年第12期3518-3524,共7页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China (92145301,22121001,22222206,and U22A20392);the Fundamental Research Funds for the Central Universities (20720220008 and 20720220021)。

摘　　要：The methanation of CO_(2) using green hydrogen not only consumes CO_(2) as a carbon resource but also stores H_(2) with high density.However,the activation of CO_(2) molecules under mild conditions is challenging due to their inert nature.Herein,we report an efficient photothermal catalytic system using light irradiation which realizes the complete conversion of CO_(2) to methane without external heating.Over optimum bimetallic Ni Fe nanoparticles(NPs)with a Ni/Fe atomic ratio of 7,the CO_(2) conversion can reach up to 98%with a CH_(4) selectivity of 99%,and no catalyst deactivation was observed for more than 100 h,outperforming the reported catalysts.The catalytic performance is strongly dependent on the structure promoters,light absorption efficiency,Ni Fe particle sizes,and Ni/Fe ratio.The Ni Fe alloy NPs with an average size of~21 nm dispersed on alumina nanosheets are evidenced to enhance the localized surface plasmon resonance(LSPR)effect,thus efficiently triggering the CO_(2) methanation.This work emphasizes and clarifies the important role of LSPR in CO_(2) hydrogenation,which may benefit the rational utilization of CO_(2) using solar power.

关 键 词：photothermal catalysis BIMETALLIC LSPR effect CO_(2)utilization hydrogen storage 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]