The Ti3AlC2 MAX Phase as an Efficient Catalyst for Oxidative Dehydrogenation of n‐Butane

Autor:	S. K. Sharma, Gadi Rothenberg, Ridwan Sakidja, P. K. Pujari, Heather F. Greer, Edwin S. Gnanakumar, Wuzong Zhou, Erdni Batyrev, Wesley Ng, Michel W. Barsoum, N. Raveendran Shiju
Přispěvatelé:	HCSC+ (HIMS, FNWI), EPSRC, University of St Andrews. School of Chemistry, University of St Andrews. EaSTCHEM
Jazyk:	angličtina
Rok vydání:	2018
Předmět:	NDAS 02 engineering and technology 010402 general chemistry Fluid catalytic cracking 01 natural sciences 7. Clean energy Catalysis Metal chemistry.chemical_compound Organic chemistry QD Dehydrogenation chemistry.chemical_classification Heterogeneous catalysis Butadiene Butane General Medicine General Chemistry Polymer VASP QD Chemistry 021001 nanoscience & nanotechnology 0104 chemical sciences Cracking chemistry visual_art visual_art.visual_art_medium MAX phase MAX phases 0210 nano-technology Oxidative dehydrogenation
Zdroj:	Angewandte Chemie, International Edition, 57(6), 1485-1490. John Wiley and Sons Ltd Angewandte Chemie, 130(6), 1501-1506. John Wiley and Sons Ltd
ISSN:	0044-8249 1433-7851
DOI:	10.1002/ange.201702196
Popis:	H. F. G. and W.Z. thank the EPSRC for a Capital Equipment Grant EP/L017008/1. Light alkenes are important raw materials for the synthesis of polymers and other chemical products. Traditionally they are obtained mainly from steam cracking and catalytic cracking units. However, dehydrogenation or oxidative dehydrogenation (ODH) of alkanes is gaining more importance to produce alkenes directly from natural gas/shale gas. Here we report that Ti3AlC2, a MAX phase, which hitherto had not used in catalysis, efficiently catalyses the ODH of n-butane to butenes and butadiene, important intermediates for the synthesis of polymers and other compounds. The catalyst, which combines both metallic and ceramic properties, is stable for at least 30 h on stream, even at low O2:butane ratios without suffering from coking. This material has neither lattice oxygens nor noble metals, yet a unique combination of numerous defects and a thin surface Ti1-yAlyO2-y/2 layer that is rich in oxygen vacancies makes it an active catalyst. Given the large number of compositions available, MAX phases may find applications in several heterogeneously catalyzed reactions. Publisher PDF
Databáze:	OpenAIRE
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