Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 59, Issue 6, Pages 2289-2293Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201912580
Keywords
amino acids; biomass; glycerol; heterogeneous catalysis; surface chemistry
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Funding
- National University of Singapore Flagship Green Energy Program [R-279-000-553-646, R-279-000-553-731]
- National Research Foundation (NRF) Singapore, under its NRF Fellowship [NRF-NRFF11-2019-0002]
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Chemical synthesis of amino acids directly from biomass feedstock is rare. Reported here is a one-step protocol to convert crude glycerol, from the biodiesel industry, into 43 % alanine over a Ru1Ni7/MgO catalyst. The multifunctional catalytic system promotes glycerol conversion into lactic acid, and then into alanine. X-ray absorption spectroscopy and scanning transmission electron microscopy revealed the existence of bimetallic RuNi species, whereas density-functional theory calculations suggested Ni-doped Ru substantially decreased the E-a of C-H bond dissociation of lactate alkoxide to form pyruvate, which is the rate-determining step. The catalytic route established in this work creates new opportunities for glycerol utilization and enriches the substrate scope of renewable feedstock to access value-added amino acids.
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