Ordered mesoporous carbon spheres assisted Ru nanoclusters/RuO_(2) with redistribution of charge density for efficient CO_(2) methanation in a novel H2/CO_(2)fuel cell  

作　　者：Yan Liu Tao Zhang Chao Deng Shixiu Cao Xin Dai Shengwu Guo Yuanzhen Chen Qiang Tan Haiyan Zhu Sheng Zhang Yongning Liu 

机构地区：[1]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,Shaanxi,China [2]Department of Chemical and Biochemical Engineering,Rutgers,The State University of New Jersey,Piscataway 08854,New Jersey,United States [3]Chongqing University Key Laboratory of Micro/Nano Materials Engineering and Technology,Chongqing University of Arts and Sciences,Chongqing 402160,China [4]Institute of Modern Physics,Northwest University,Shaanxi Key Laboratory for Theoretical Physics Frontiers,Xi’an 710069,Shaanxi,China [5]Key Laboratory for Green Chemical Technology of Ministry of Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China

出　　处：《Journal of Energy Chemistry》2022年第9期116-124,I0004,共10页能源化学（英文版）

基　　金：financially supported by the Natural Science Foundation of Shaanxi Provincial(2021JQ-034);Chongqing University Key Laboratory of Micro/Nano Materials Engineering and Technology(KFJJ2012);by University Joint Project of Shaanxi Province(2021GXLH-Z-067)。

摘　　要：Efficiently reducing carbon dioxide(CO_(2))into carbon chemicals and fuels is highly desirable due to the rapid growth of atmospheric CO_(2)ncentration.In prior work,we described a unique H/CO_(2)fuel cell driven by low-valued waste heat,which not only CO_(2)nverts CO_(2)to methane(CH_(4))but also outputs electrical energy,yet the CO_(2)reduction rate needs to be urgently improved.Here,a novel Ru-RuOcatalyst with heterostructure was grafted on mesoporous carbon spheres by in situ partially reducing RuOinto ultrasmall Ru clusters(~1 nm),in which heteroatom-doped carbon spheres as a matrix with excellent CO_(2)nductivity and abundant pores can not only easily CO_(2)nfine the formation of Ru nanocluster but also are beneficial to the exposed active sites of Ru CO_(2)mplex and the mass transport.CO_(2)mpared to pure RuOnanoparticles supported on carbon spheres,our CO_(2)mposite catalyst boosts the CO_(2) nversion rate by more than 5-fold,reaching a value of 382.7μmol gcat.h-1at 170℃.Moreover,a decent output power density of 2.92 W mwas obtained from this H2/CO_(2)fuel cell using Ru-RuOembedded carbon spheres as a cathode catalyst.The Ru-RuOheterostructure can modify the adsorption energy of CO_(2)and induce the redistribution of charge density,thus boosting CO_(2)reduction significantly.This work not only offers an efficient catalyst for this novel H_(2)/CO_(2)fuel cell but also presents a facile method to prepare Ru nanoclusters.

关 键 词：CO_(2)methanation Fuel cell Generating electricity Ru nanocluster/RuO_(2)hybrid Ordered mesoporous carbon spheres 

分 类 号：TM911.4[电气工程—电力电子与电力传动] O643.36[理学—物理化学]