Enhancing catalytic activity and stability for CO2 methanation on Ni-Ru/gamma-Al2O3 via modulating impregnation sequence and controlling surface active species | |
Department | OSSO国家重点实验室 |
Zhen WL(甄文龙)1,2; Li B(李波)1,2; Lu GX(吕功煊)2; Ma JT(马建泰)1; Lv GX(吕功煊) | |
2014 | |
Source Publication | RSC Advances |
ISSN | 2046-2069 |
Volume | 4Issue:32Pages:16472-16479 |
Abstract | Bimetallic Ni–Ru NPs loaded onto γ-Al2O3 were prepared by co-impregnation and sequential impregnation methods and were investigated for CO2 methanation in the temperature range of 250–500 °C under atmospheric pressure to uncover the dependence of activities on surface species. It was found that the activities of CO2 methanation were very highly dependent on the preparation sequence. Comparing the activity results dependence with the characterization results of XRD, H2-TPR, BET, TEM-EDX and XPS techniques, it was indicated that the dispersion of Ru and Ni was controlled by preparation steps, and the tendency of Ru segregation on the catalyst surface was identified. This tendency led to the high activity of the 10Ni–1.0Ru catalyst. Such surface segregation phenomena of Ru in the co-impregnation process controlled the chemical state of surface Ru species, allowing them to be easily reduced to the metallic state. In addition, the 10Ni–1.0Ru catalyst performed with high stability and showed almost no deactivation up to 100 h in long term stability tests. The possible reaction mechanism was proposed, in which CO2 was dissociated and was activated on Ru species' surfaces to form carbon species (COads), and then was reacted with activated H on Ni centres to form methane. |
Subject Area | 物理化学与绿色催化 |
DOI | 10.1039/c3ra47982j |
Funding Organization | the 973 and 863 Programs of the Department of Sciences and Technology of China (2013CB632404;2012AA051501);the NSF of China (grant no. 21173242) |
Indexed By | SCI |
If | 3.840 |
Language | 英语 |
Funding Project | 环境催化与氢能源组 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/20450 |
Collection | 羰基合成与选择氧化国家重点实验室(OSSO) |
Corresponding Author | Lv GX(吕功煊) |
Affiliation | 1.Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Peoples R China |
Recommended Citation GB/T 7714 | Zhen WL,Li B,Lu GX,et al. Enhancing catalytic activity and stability for CO2 methanation on Ni-Ru/gamma-Al2O3 via modulating impregnation sequence and controlling surface active species[J]. RSC Advances,2014,4(32):16472-16479. |
APA | Zhen WL,Li B,Lu GX,Ma JT,&吕功煊.(2014).Enhancing catalytic activity and stability for CO2 methanation on Ni-Ru/gamma-Al2O3 via modulating impregnation sequence and controlling surface active species.RSC Advances,4(32),16472-16479. |
MLA | Zhen WL,et al."Enhancing catalytic activity and stability for CO2 methanation on Ni-Ru/gamma-Al2O3 via modulating impregnation sequence and controlling surface active species".RSC Advances 4.32(2014):16472-16479. |
Files in This Item: | ||||||
File Name/Size | DocType | Version | Access | License | ||
2014,4(32),16472-164(1638KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment