Pichler Christian M, Al-Shaal Mohammad G, Gu Dong, Joshi Hrishikesh, Ciptonugroho Wirawan, Schüth Ferdi
Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany.
The Institute for Advanced Studies, Wuhan University, Wuhan, Hubei, 430072, P. R. China.
ChemSusChem. 2018 Jul 11;11(13):2083-2090. doi: 10.1002/cssc.201800448. Epub 2018 Jun 5.
Several ZrO -supported ruthenium catalysts were prepared and utilized in the oxidation of 5-hydroxymethylfurfural (HMF) to 2,5-furandicarboxylic acid (FDCA) under base-free conditions. Full conversion of HMF and almost perfect selectivity towards FDCA (97 %) were achieved after 16 h by using pure O as an oxidant and water as a solvent. The catalytic tests show that the size of the Ru particles is crucial for the catalytic performance and that the utilization of high-surface-area ZrO leads to formation of very small Ru particles. Superior activity was obtained for catalysts based on ZrO that had been synthesized by a surface-casting method and has high surface areas up to 256 m g . In addition to good activity and selectivity, these catalysts show also high stability and constant activity upon recycling, confirming the suitability of Ru/ZrO in the base-free oxidation of HMF.
制备了几种负载在ZrO上的钌催化剂，并用于在无碱条件下将5-羟甲基糠醛（HMF）氧化为2,5-呋喃二甲酸（FDCA）。以纯O作为氧化剂、水作为溶剂，16小时后HMF实现了完全转化，对FDCA的选择性几乎达到完美（97%）。催化测试表明，Ru颗粒的尺寸对催化性能至关重要，并且使用高比表面积的ZrO会导致形成非常小的Ru颗粒。对于通过表面浇铸法合成且比表面积高达256 m²/g的基于ZrO的催化剂，获得了优异的活性。除了良好的活性和选择性外，这些催化剂在循环使用时还表现出高稳定性和恒定活性，证实了Ru/ZrO在HMF无碱氧化中的适用性。
