期刊
CATALYSIS TODAY
卷 333, 期 -, 页码 10-16出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2018.07.010
关键词
Ethylene; Oxidative dehydrogenation (ODH); Supported NiO; EXAFS
资金
- DGICYT in Spain [CTQ2015-68951-C3-1-R, CTQ2015-68951-C3-3-R, CTQ2012-37925-C03-2, ENE2017-88818-C2-1-R]
- ALBA Synchrotron Light Source (CLAESS beamline) [2015021258]
- MINECO
- Severo Ochoa Excellence Program [SVP-2014-068669]
- University of Valencia [UV-INV-AE16-484416]
- MINECO [MAT2017-84118-C2-1-R]
- [SEV-2016-0683]
We report on the effect of NiO-support interactions on the chemical nature of Ni species in a series of supported NiO catalysts for the ODH of ethane. SiO2, TiO2-anatase, a high surface area TiO2 and a porous clay hetero-structure (PCH) with TiO2 and SiO2 pillars were used as supports, which led to a selectivity to ethylene in the range 30-90% over supported NiO catalysts. The catalysts were characterized by means of XRD, N-2-Adsorption, H-2-TPR, XPS and in situ (under H-2 reductive atmosphere) and ex situ XAS spectroscopy. The catalytic performance of supported materials is discussed in terms of their reducibility and specific reduction kinetics, but also taking into account the specific chemical nature of Ni species on each catalyst. The influence of the particle size and the presence of Ni and O vacancies on the catalytic performance in the ODH of ethane is inferred.
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