title: Crystal Facets Make a Profound Difference in Polyoxometalate-Containing Metal-Organic Frameworks as Catalysts for Biodiesel Production.
abstract: An inherent challenge in using metal-organic frameworks (MOFs) for catalysis is how to access the catalytic sites generally confined inside the porous structure, in particular for substrates larger than the pores. We present here a promising solution to bypass this roadblock by modulating the facets of a crystalline MOF NENU-3a to enhance the facet exposure of the catalytic sites and the adsorption of substrates. Specifically, by transforming it with encapsulated catalysis-responsible polyoxometalate from octahedron characterized entirely by {111} facets to cube with only {100} facets, much enhanced catalytic activities were observed, especially for sterically demanding substrates that are otherwise hard to diffuse into the pores. Crystallographic analysis and adsorption/desorption experiments collectively established the critical effects of morphological control on the enhanced catalysis. The cubic crystals were then applied for biodiesel production, reaching more than 90% conversion of fatty acids (C12-C22) in comparison to <22% using octahedral crystals.
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Yiwei
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Shumei
authors.initials: S
authors.lastname: Liu
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Danfeng
authors.initials: D
authors.lastname: He
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Ning
authors.initials: N
authors.lastname: Li
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Yujuan
authors.initials: Y
authors.lastname: Ji
authors.affiliation: Department of Chemistry, University of Arizona , Tucson, Arizona 85721, United States.
authors.forename: Zhiping
authors.initials: Z
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Fang
authors.initials: F
authors.lastname: Luo
authors.affiliation: Key Laboratory of Polyoxometalate Science of the Ministry of Education, College of Chemistry, Northeast Normal University , Changchun, Jilin 130024, China.
authors.forename: Shuxia
authors.initials: S
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University , Changchun, Jilin 130012, China.
authors.forename: Zhan
authors.initials: Z
authors.lastname: Shi
authors.affiliation: Key Laboratory of Cluster Science of Ministry of Education, Department of Chemistry, Beijing Institute of Technology , Beijing 100081, China.
authors.forename: Changwen
authors.initials: C
authors.lastname: Hu
mesh_terms: D056804:Biofuels; D002214:Capsules / Q000737:chemistry; D002384:Catalysis; D008855:Microscopy, Electron, Scanning; D009942:Organometallic Compounds / Q000737:chemistry*; D016062:Porosity; D017973:Tungsten Compounds / Q000737:chemistry*; D000099294:Polyoxometalates
chemical_list: D056804:Biofuels; D002214:Capsules; D009942:Organometallic Compounds; D017973:Tungsten Compounds; C102296:polyoxometalate I; D000099294:Polyoxometalates