文献类型：期刊文献

英文题名：Ni-based catalysts derived from Ni-Zr-Al ternary hydrotalcites show outstanding catalytic properties for low-temperature CO2 methanation

作者：He, Feng[1,2];Zhuang, Jiahao[2,3];Lu, Bin[4];Liu, Xianglin[5];Zhang, Jianling[2];Gu, Fangna[2];Zhu, Minghui[5];Xu, Jing[5];Zhong, Ziyi[6,7];Xu, Guangwen[1,8];Su, Fabing[2,8]

机构：[1]Shenyang Univ Chem Technol, Minist Educ, Key Lab Resources Chem & Mat, Shenyang 110142, Peoples R China;[2]Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China;[3]Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China;[4]CNBM Bengbu Design & Res Inst Glass Ind Co Ltd, Bengbu 233000, Peoples R China;[5]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[6]Guangdong Technion Israel Inst Technol GTIIT, Dept Chem Engn, 241 Daxue Rd, Shantou 515063, Peoples R China;[7]Technion Israel Inst Technol IIT, IL-32000 Haifa, Israel;[8]Shenyang Univ Chem Technol, Inst Ind Chem & Energy Technol, Shenyang 110142, Peoples R China

年份：2021

卷号：293

外文期刊名：APPLIED CATALYSIS B-ENVIRONMENT AND ENERGY

收录：;EI(收录号：20211710255225);WOS:【SCI-EXPANDED(收录号:WOS:000663205600003)】；

基金：This research was funded by the National Natural Science Foundation of China (21776286) and National Key R&D Program of China (2018YFB0604501). Professor Yi-Fan Han at East China University of Science and Technology is appreciated for his valuable suggestion and discussion.

语种：英文

外文关键词：Ni-Zr-Al hydroxides; Ni-based catalyst; CO2 methanation; Mechanism; High performance

摘要：Developing Ni-based catalysts with high activity and stability in low-temperature methanation is necessary due to their sintering and coking at high temperatures. Here, we report our developed novel Ni-Zr-Al catalysts derived from Ni-Zr-Al ternary hydrotalcites synthesized by a hydrothermal process, followed by a reduction in hydrogen. Comparing with the Ni-Al catalyst derived from Ni-Al hydrotalcite and the commercial Ni-based catalyst, the Ni-Zr-Al catalysts show a remarkably higher low-temperature activity (210-270 degrees C) in CO2 methanation. Both the experimental and theoretical calculations confirmed the introduction of Zr into the Ni-Al binary hydrotalcite could generate synergetic effects between Ni and ZrO2, resulting in more surface oxygen vacancies, basic sites, and abundant mesopores. In-situ DRIFTS analysis showed the CO2 methanation to CH4 follows the intermediate formate route. This work provides a new theoretical understanding of CO2 activation and methanation, and a practical way to address the existing problem for Ni-based catalysts.