Dry-gel synthesis of hierarchical Ni-La@S-1 catalysts with stabilized Ni-La bimetals nanoparticles for dry reforming of methane  

作　　者：Jin Lv Youhe Wang Junjie Liu Zhichao Zhang Yu Ma Ziyi Zhou Yuqing Ouyang Jie Zhong Xiang Rao Hongman Sun Xiaoyun Xiong Qingxun Hu Guofeng Zhao Zifeng Yan 

机构地区：[1]State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, China [2]Lanzhou Petrochemical Research Center, PetroChina, Lanzhou, 730060, China [3]Anhui Basic Discipline Research Center for Clean Energy and Catalysis, College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241002, China

出　　处：《Nano Research》2024年第11期10216-10226,共11页纳米研究（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.21776311,22102215,and 22372197);the Natural Science Foundation of Shandong Province,China(No.ZR2023MB101);the Fundamental Research Funds for the Central Universities(Nos.22CX03001A and 21CX06013A);the Taishan Scholar Foundation of Shandong Province(Nos.tspd20210308 and tsqnz20221119);the “111” Program of National College Disciplinary Innovation(No.B13031);the Special Program for Basic Researc of CNPC(No.2023ZZ36);the College Students’ Innovative Entrepreneurial Training Plan Program(No.202403018CX).

摘　　要：Dry reforming of methane (DRM) can simultaneously convert two critical greenhouse gases CH4 and CO_(2) into high-value syngas. However, the catalyst deactivation caused by sintering and carbon deposition of Ni-based catalysts at high temperature is a significant problem to be solved for DRM industrialization. Herein, we represent a hierarchical Ni-La@S-1 catalyst for DRM reaction, showing high anti-sintering/coke capacity to improve DRM stability. The La and Ni nitrates were first grinded into the pores of SBA-15 followed by N2-treatment;the sample was then recrystallized by a unique template assisted-uniformly dispersed strategy to obtain the hierarchical Ni-La@S-1 catalyst. This strategy achieves uniform encapsulation of stabilized Ni-La bimetallic nanoparticles in S-1 with high loading, exhibiting high DRM activity and stability at 700 °C and 36,000 mL·g^(−1)·h^(−1). Moreover, La addition promoted CO_(2) to form bidentate carbonate, a critical intermediate in DRM, which greatly ameliorated carbon deposition in Ni catalysts. This work offers promising clue for tailoring the industrial DRM catalysts.

关 键 词：Ni-La bimetals encapsulation dry gel recrystallization dry reforming of methane stability additive metal 

分 类 号：O64[理学—物理化学]