Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 139, Issue 36, Pages 12382-12385Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.7b06629
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Funding
- Office of Science, Office of Basic Energy Sciences, Division of Chemical Sciences, and Geological and Biosciences of the U.S. Department of Energy [DE-AC02-05CH11231]
- Chevron Energy Technology Company
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Exceptionally high surface area and ordered nanopores of a metal organic framework (MOP) are exploited to encapsulate and homogeneously disperse a considerable amount of phosphotungstic acid (PTA). When combined with platinum nanopartides positioned on the external surface of the MOF, the construct shows a high catalytic activity for hydroisomerization of n-hexane, a reaction requiring hydrogenation/dehydrogenation and moderate to strong Bronsted acid sites. Characterization of the catalytic activity and acidic sites as a function of PTA loading demonstrates that both the concentration and strength of acidic sites are highest for the catalyst with the largest amount of PTA. The MOF construct containing 60% PTA by weight produces isoalkanes with 100% selectivity and 9-fold increased mass activity as compared to a more traditional aluminosilicate catalyst, further demonstrating the capacity of the MOF to contain a high concentration of active sites necessary for the isomerization reaction.
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