Crystal Facets Make a Profound Difference in Polyoxometalate-Containing Metal-Organic Frameworks as Catalysts for Biodiesel Production

Yiwei Liu, Shumei Liu, Danfeng He, Ning Li, Yujuan Ji, Zhiping Zheng, Fang Luo, Shuxia Liu, Zhan Shi, Changwen Hu

Research output: Contribution to journalArticle

83 Scopus citations

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

Original languageEnglish (US)
Pages (from-to)12697-12703
Number of pages7
JournalJournal of the American Chemical Society
Volume137
Issue number39
DOIs
StatePublished - Oct 7 2015

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Fingerprint Dive into the research topics of 'Crystal Facets Make a Profound Difference in Polyoxometalate-Containing Metal-Organic Frameworks as Catalysts for Biodiesel Production'. Together they form a unique fingerprint.

  • Cite this