Manganese-promoted Ni/Al2O3 catalysts for effective CO2 methanation

被引：1

作者：

Zhang, Wenhao ^{[1
]}

Shen, Liang ^{[1
]}

Xu, Longhao ^{[1
]}

Zhou, Fayang ^{[1
]}

Sun, Fengyin ^{[1
]}

Xu, Jing ^{[1
,2
]}

Zhu, Minghui ^{[1
]}

机构：

[1] East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Green Chem Engn & Ind Catalysis, 130 Meilong Rd, Shanghai 200237, Peoples R China

[2] Guangxi Univ, Sch Chem & Chem Engn, Guangxi Key Lab Petrochem Resource Proc & Proc Int, Nanning 530004, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2025年 / 448卷

基金：

中国国家自然科学基金;

关键词：

CO; 2; methanation; NiMn/Al; O; 3; catalysts; Ni-NiMnO x interface; Electron-poor Ni nanoparticles; Oxygen vacancy; Enhanced CO2 activation and *CO methanation; NI CATALYSTS; NANOPARTICLES; OXIDATION; HYDROGENATION; INTERFACE; EFFICIENT; ALUMINA; COAL;

D O I：

10.1016/j.jcat.2025.116215

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Hydrogenation of CO2 to methane is a feasible solution to the growing global environmental and energy challenges. Nickel-based catalysts are efficient and cost effective for CO2 methanation. Hernin, we synthesized Mnpromoted Ni/Al2O3 catalysts with facilitated CO2 methanation and elucidated the crucial role of Mn. After Mn doping, NiMn/Al2O3 catalysts showed improved NiO dispersion. Subsequently, H2 reduction and CO2 methanation treatments resulted in reduction of NiO and MnO2 into Ni and MnO, and incorporation of Ni2+ into MnO lattice, forming NiMnOx and creating numerous Ni-NiMnOx interfaces. The abundant oxygen vacancies from NiMnOx could enhance CO2 activation. Moreover, oxygen vacancies at the interface also promote electron transfer from Ni and MnO, leading to electron-poor Ni nanoparticles and thus significantly promoting the *CO methanation. Ultimately, the electron-poor Ni nanoparticles and abundant oxygen vacancies at the Ni-NiMnOx interface jointly facilitate CO2 methanation.

引用

页数：9

共 59 条

[1] Mechanistic Features of the CeO2-Modified Ni/Al2O3 Catalysts for the CO2 Methanation Reaction: Experimental and Ab Initio Studies [J].