Enhancement of hollow Ni/CeO2-Co3O4 for CO2 methanation: From CO2 adsorption and activation by synergistic effects

被引：35

作者：

Hu, Feiyang ^{[1
,2
]}

Jin, Chengkai ^{[1
]}

Wu, Rundong ^{[1
]}

Li, Claudia ^{[2
]}

Song, Guoqiang ^{[2
]}

Gani, Terry Zhi Hao ^{[2
]}

Lim, Kang Hui ^{[2
]}

Guo, Wei ^{[2
]}

Wang, Tianchang ^{[2
]}

Ding, Shunmin ^{[1
]}

Ye, Runping ^{[1
]}

Lu, Zhang-Hui ^{[3
]}

Feng, Gang ^{[1
]}

Zhang, Rongbin ^{[1
]}

Kawi, Sibudjing ^{[2
]}

机构：

[1] Nanchang Univ, Inst Appl Chem, Coll Chem & Chem Engn, Key Lab Jiangxi Prov Environm & Energy Catalysis, 999 Xuefu Rd, Nanchang 330031, Peoples R China

[2] Natl Univ Singapore, Dept Chem & Biomol Engn, 4 Engn Dr 4, Singapore 117585, Singapore

[3] Jiangxi Normal Univ, Coll Chem & Chem Engn, Nanchang 330022, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2023年 / 461卷

基金：

中国国家自然科学基金;

关键词：

Ni; Chemical adsorption; Synergistic effects; Reaction mechanism; LOW-TEMPERATURE; CATALYTIC-OXIDATION; OXYGEN VACANCIES; CO3O4; PERFORMANCE; HYDROGENATION; EVOLUTION; SUPPORT; NI; CONVERSION;

D O I：

10.1016/j.cej.2023.142108

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

CO2 absorption and activation play key roles in the process of CO2 methanation, but revealing the mechanism and synergistic effects are still challenges, especially in some complicated routes. Herein, an optimized hollow Ni/CeO2-Co3O4 catalyst is shown to be capable of CO2 absorption and activation, the performance could be attributed to the strong synergistic effects among each component. In addition, the respective role was verified that the Co3O4 and CeO2 contributed to the CO2 adsorption and subsequently coupled with Ni for CO2 activation. Furthermore, in-situ DRIFTS were used to demonstrate the hydrogenation mechanisms, and the promotion of CO2 absorption and CH4 selectivity was confirmed in Ni/CeO2-Co3O4. The DFT results verified the synergistic effects of the established catalysts, which could also be a universal strategy for the catalysts designation.

引用

页数：13

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