Affiliation:
1. Department of Chemical Engineering School of Engineering The University of Manchester Oxford Road Manchester M13 9PL UK
2. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences 72 Wenhua Road Shenyang 110016 China
3. Diamond Light Source Harwell Science and Innovation Campus Didcot Oxfordshire OX11 0DE UK
4. University of Manchester at Harwell Diamond Light Source Harwell Science and Innovation Campus Didcot Oxfordshire OX11 0DE UK
5. UK Catalysis Hub Research Complex at Harwell Rutherford Appleton Laboratory Harwell Oxfordshire OX11 0FA UK
Abstract
AbstractSynthesis of 2,5‐furandicarboxylic acid (FDCA) can be achieved via catalytic oxidation of 5‐hydroxymethylfurfural (5‐HMF), in which both base and catalyst play important roles. This work presents the development of a simple synthesis method (based on a commercial parent 10 wt.% Pd/C catalyst) to prepare the bimetallic AuPd alloy catalysts (i. e., AuPd/C) for selective 5‐HMF oxidation to FDCA. When using the strong base of NaOH, Pd and Au cooperate to promote FDCA formation when deployed either separately (as a physical mixture of the monometallic Au/C and Pd/C catalysts) or ideally alloyed (AuPd/C), with complete 5‐HMF conversion and FDCA yields of 66 % vs 77 %, respectively. However, NaOH also promoted the formation of undesired by‐products, leading to poor mass balances (<81 %). Comparatively, under weak base conditions (using NaHCO3), an increase in Au loading in the AuPd/C catalysts enhances 5‐HMF conversion and FDCA productivity (due to the enhanced carbonyl oxidation capacity) which coincides with a superior mass balances of >97 %. Yet, the excessive Pd content in the AuPd/C catalysts was not beneficial in promoting FDCA formation.
Funder
Engineering and Physical Sciences Research Council
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