In-situ exsolved ultrafine Ni nanoparticles from CeZrNiO_(2)solid solution for efficient photothermal catalytic CO_(2)reduction by CH4  

作　　者：Guanrui Ji Lei Ji Shaowen Wu Lingxin Meng Yuteng Jia Zhanning Liu Shihua Dong Jian Tian Yuanzhi Li 

机构地区：[1]School of Materials Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China [2]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,122 Luoshi Road,Wuhan 430070,China

出　　处：《Advanced Powder Materials》2024年第3期86-94,共9页先进粉体材料（英文）

基　　金：supported by the National Natural Science Foundation of China(22202121,22005340);Shandong Provincial Natural Science Foundation(ZR2021QB079).

摘　　要：CO_(2)reduction by CH4(CRM)to produce fuel is of great significance for solar energy storage and eliminating greenhouse gas.Herein,the catalyst of ultrafine Ni nanoparticles supported on CeZrNiO_(2)solid solution(Ni@CZNO)was synthesized by the sol-gel method.High yield of H_(2)and CO(58.0 and 69.8 mmol min^(-1)g^(-1))and excellent durability(50 h)were achieved by photothermal catalytic CRM merely under focused light irradiation.Structural characterization and DFT calculations reveal that CZNO has rich oxygen vacancies that can adsorb and activate CO_(2)to produce reactive oxygen species.Oxygen species are transferred to ultrafine Ni nanoparticles through the rich Ni-CZNO interface to accelerate carbon oxidation,thereby maintaining the excellent catalytic stability of the catalyst.Moreover,the experimental results reveal that light irradiation can not only enhance the photothermal catalytic CRM activity through photothermal conversion and molecular activation,but also improve the stability by increasing the concentration of oxygen vacancies and inhibiting CO disproportionation.

关 键 词：Photothermal catalysis CO_(2)reduction CeZrNiO2 solid solution PHOTOACTIVATION Stability 

分 类 号：O64[理学—物理化学]