Construction of Cu-Ce/graphene catalysts via a one-step hydrothermal method and their excellent CO catalytic oxidation performance | |
Zhao YS(赵吟霜)1,2; Dong F(董芳)1; Han WL(韩维亮)1; Zhao HJ(赵海军)1; Tang ZC(唐志诚)1; Tang ZC(唐志诚) | |
刊名 | RSC Advances |
2018 | |
卷号 | 8期号:3页码:1583-1592 |
ISSN号 | 2046-2069 |
DOI | 10.1039/c7ra11676d |
英文摘要 | Cu–Ce/graphene catalysts show high dispersion of metal particles and excellent activity and stability for catalytic oxidation. In this study, a hydrothermal method was used to synthesize a series of bimetallic Cu–Ce/graphene catalysts, and the effects of the proportions of Cu and Ce on CO oxidation were investigated in detail. Indispensable characterizations such as XPS, XRD, TEM, BET, and H2-TPR were conducted to explore the effect of the Cu/Ce molar ratio and the metal valence on the activity and determine the structure–performance relationship. The results showed that bimetallic supported catalysts, such as 3Cu5Ce/graphene, 1Cu1Ce/graphene, and 5Cu3Ce/graphene, possessed significant catalytic activity. Especially, the 5Cu3Ce/graphene catalyst showed highest catalytic activity for CO oxidation, the T100 value was 132 °C, and the apparent activation energy was 68.03 kJ mol−1. Furthermore, the stability of the 5Cu3Ce/graphene catalyst was outstanding, which could be maintained for at least 12 h. Moreover, the CeO2 particles were well crystalline with the size 5–9 nm in these catalysts, and the CuO nanoparticles were well dispersed on CeO2 and graphene. Notably, the ratio of Cu/Ce in the catalyst was higher, the interaction between the Ce species and the graphene was stronger, and the Cu species were more easily reduced; this was beneficial for the oxidation of CO. |
学科主题 | 物理化学与绿色催化 |
资助项目 | 工业催化研究组 |
语种 | 英语 |
WOS记录号 | WOS:000419371200050 |
资助机构 | the National Natural Science Foundation of China (21407154 ; 21507137) ; West Light Foundation of The Chinese Academy of Sciences |
内容类型 | 期刊论文 |
源URL | [http://ir.licp.ac.cn/handle/362003/23778] |
专题 | 兰州化学物理研究所_ERC国家工程研究中心 兰州化学物理研究所_OSSO国家重点实验室 |
通讯作者 | Tang ZC(唐志诚) |
作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, Natl Engn Res Ctr Fine Petrochem Intermediates, State Key Lab Oxo Synth & Select Oxidat, Lanzhou 730000, Gansu, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100039, Peoples R China |
推荐引用方式 GB/T 7714 | Zhao YS,Dong F,Han WL,et al. Construction of Cu-Ce/graphene catalysts via a one-step hydrothermal method and their excellent CO catalytic oxidation performance[J]. RSC Advances,2018,8(3):1583-1592. |
APA | Zhao YS,Dong F,Han WL,Zhao HJ,Tang ZC,&Tang ZC.(2018).Construction of Cu-Ce/graphene catalysts via a one-step hydrothermal method and their excellent CO catalytic oxidation performance.RSC Advances,8(3),1583-1592. |
MLA | Zhao YS,et al."Construction of Cu-Ce/graphene catalysts via a one-step hydrothermal method and their excellent CO catalytic oxidation performance".RSC Advances 8.3(2018):1583-1592. |
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