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One hurdle in developing transition metal oxide (TMO) catalysts for aerobic oxidation reactions is their need for a low binding energy of the lattice oxygen (O-L) to create active O-L and a high O-L binding energy to maintain structural stability during catalysis. In this work, we prepared amorphous Zr-doped manganese oxide (amor-Zr:MnOx) catalysts carrying dual lattice oxygens that can address such conflicting objectives in catalyst development. In the aerobic oxidation of 5-(hydroxymethyl)furfural (HMF), the amor-Zr0.2MnOx catalyst gave 99% selectivity for 2,5-furandicarboxylic acid (FDCA) and a high FDCA formation rate of 3600 mu mol(FDCA) g(cat)(-1) h(-1) in 1 h. To the best of our knowledge, the aerobic oxidation performance of the amor-Zr0.2MnOx catalyst is superior to those of most Mn-based and related TMO-based catalysts under comparable conditions. Experimental and theoretical studies show that the O-L in amor-Zr: MnOx can be divided into two groups. One group includes the more stable O-L that strengthens the catalyst structure and prevents phase transition, while the other group includes the more reactive O-L that improves catalyst activity through the strong adsorption/activation of O-2 and helps regenerate O-L during catalysis.
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SCIENCE CHINA-MATERIALS
ISSN: 2095-8226
CN: 10-1236/TB
Year: 2023
Issue: 5
Volume: 66
Page: 1829-1836
6 . 8
JCR@2023
6 . 8 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:49
JCR Journal Grade:1
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 5
SCOPUS Cited Count: 5
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 0
Affiliated Colleges: