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Noble-metal-free and Pt nanoparticles-loaded, mesoporous oxides as efficient catalysts for CO2 hydrogenation and dry reforming with methane.
- Source :
- Journal of CO2 Utilization; Jul2019, Vol. 32, p106-118, 13p
- Publication Year :
- 2019
-
Abstract
- • Series of free-standing as well as controlled size Pt nanoparticles-loaded mesoporous metal oxides. • Pt-free NiO exhibited the highest catalytic activity and showing 100% CH 4 selectivity. • Striking catalytic properties can be ascribed to the presence of metallic Ni and the optimal dynamics of Ni/NiO x structure. In this study, a series of free-standing as well as controlled size Pt nanoparticles-loaded mesoporous metal oxides (NiO, Co 3 O 4, CeO 2 and MnO 2) with high surface area and designed pore structure were prepared by hard template method and used as catalysts for CO 2 hydrogenation together with dry reforming of CO 2 with methane. The physicochemical properties of catalysts were analysed by N 2 adsorption-desorption isotherm, XRD, TEM, and H 2 -TPR. Pt-free and Pt-loaded mesoporous NiO and Co 3 O 4 performed with high catalytic activity and selectivity for both CO 2 activation reactions. Pt-free NiO exhibited the highest catalytic activity and also showing 100% CH 4 selectivity between 473–673 K and ˜1:1 H 2 /CO 2 ratio between 673–973 K in CO 2 hydrogenation and dry reforming with methane, respectively. The enhanced catalytic properties can be due to the existence of metallic Ni as well as the optimal dynamics of Ni/NiO x structure under reaction conditions. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 22129820
- Volume :
- 32
- Database :
- Supplemental Index
- Journal :
- Journal of CO2 Utilization
- Publication Type :
- Academic Journal
- Accession number :
- 137644041
- Full Text :
- https://doi.org/10.1016/j.jcou.2019.04.004