Interface-directed epitaxially growing nickle ensembles as efficient catalysts in dry reforming of methane

作     者：Ping Wang Song Wei Shiyi Wang Ronghe Lin Xiaoling Mou Yunjie Ding Ping Wang;Song Wei;Shiyi Wang;Ronghe Lin;Xiaoling Mou;Yunjie Ding

作者机构：Hangzhou Institute of Advanced StudiesZhejiang Normal UniversityHangzhou 311231ZhejiangChina School of Chemical Engineering and Light IndustryGuangdong University of Technology.Guangzhou 510006GuangdongChina Analysis and Test CenterGuangdong University of TechnologyGuangzhou 510006GuangdongChina Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina The State Key Laboratory of CatalysisDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2022年第31卷第3期

页      面：502-513,I0014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] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financial supports from the Zhejiang Normal University(YS304320035) the Natural Science Foundation of China(21603039) 

主　　题：Methane dry reforming Nickel Interface Epitaxial growth Structure-performance relationship 

摘      要：Supported nickel catalysts are promising candidates for dry reforming of methane, but agglomeration of Ni^(0) and coke deposition hinder the industrial applications. Herein, we report a novel interface-directed synthetic approach to construct distinct metal ensembles by carefully tuning the compositions of the carriers. A Zr-Mn-Zn ternary oxide-supported Ni catalyst, together with the respective binary oxide-supported analogues, was synthesized by adopting a sequential co-precipitation and wetness impregnation method. Combined characterization techniques identify distinct catalyst models, including (i) conventional NiO nanoparticles with different sizes on Zr-Mn and Zr-Zn, and (ii) epitaxially growing NiO ensembles of a few nanometers thickness at the periphery of ZnO_(x) particles. These catalysts exhibit divergent responses in the catalytic testing, with the ternary oxide system significantly outperforming the binary analogues. The strong electronic interactions between Mn-Ni increase Ni dispersion and the activity while the stability is strengthened upon Zn addition. Both high activity, high selectivity, and remarkable stability are attained upon co-adding Mn and Zn. The interfaces between Ni and Zr-Mn-Zn rather than the physical contacts of individual oxide-supported analogues through mechanical mixing are keys for the outstanding performance.