Hydroisonnerization of n-Hexane Using Acidified Metal-Organic Framework and Platinum Nanoparticles

作者：Sabyrov Kairat; Jiang Juncong; Yaghi Omar M; Somorjai Gabor A

来源：Journal of the American Chemical Society, 2017, 139(36): 12382-12385.

DOI：10.1021/jacs.7b06629

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.

• 出版日期2017-9-13