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Title: Deoxydehydration of Biomass-Derived Polyols with a Reusable Unsupported Rhenium Nanoparticles Catalyst

Journal Article · · ACS Sustainable Chemistry & Engineering

Oxorhenium catalysts effectively transform biomass derived polyols into corresponding alkenes, via deoxydehydration (DODH) with a secondary alcohol as a hydrogen donor. This report describes the preparation of unsupported rhenium oxide nanoparticles (ReOx NPs), their use as DODH heterogeneous catalyst, and changes in the speciation and structure of Re during catalysis leading to a mechanism for DODH by a heterogeneous catalyst. The unsupported nanoparticles catalyze various polyols transformation to produce alkenes with high efficiency and recyclability. X-ray spectroscopy analysis shows the structure of as-prepared ReOx NPs is similar to perrhenate with oxidation state between Re(VI) and Re(VII). Under reaction conditions and post catalysis, the ReOx NPs are reduced by approximately two oxidation units. Kinetic isotope effect demonstrates that dissociation of a C-H bond during reduction of ReOx NPs by 3-octanol is part of the rate-determining step. Based on all experimental observations, the mechanism of DODH catalysis with unsupported ReOx NPs involving a Re(VII)/Re(V) redox-pair is introduced.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1559530
Journal Information:
ACS Sustainable Chemistry & Engineering, Vol. 7, Issue 13; ISSN 2168-0485
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 19 works
Citation information provided by
Web of Science

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Cited By (1)

Recent Advances in the Deoxydehydration of Vicinal Diols and Polyols journal October 2019