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Zirconium phosphate supported copper catalyst for selective oxidation of phenol to cis, cis-muconic acid.
- Source :
-
Applied Catalysis A: General . Aug2023, Vol. 664, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- The selective oxidation of phenol into cis, cis -muconic acid was carried out with α-zirconium phosphate supported-copper catalysts. It has been found that a sole α-zirconium phosphate exhibited a preferential selectivity (up to 80%) towards dihydroxybenzene (Catechol/Hydroquinone=1.4:1). Moreover, the further studies indicated that α-zirconium phosphate-supported copper catalysts enable to catalyze the oxidative cleavage of catechol into high-added valuable platform molecule cis,cis -muconic acid (ccMA) by in-situ generating performic acid. A 66% conversion of phenol and 60% selectivity towards cis, cis -muconic acid were obtained under mild reaction condition (30 °C, 2 h). The detailed characterization by means of XRD, SEM, TEM, and pyridine-absorbed FT-IR techniques demonstrated that copper(II) species were highly dispersed on α-zirconium phosphate, and could be bonded with the phosphate group of the support. The forming Cu(II)-O-P linkage was proved to be catalytically active species and endowed the supported-copper catalysts with a superior recyclability. The reaction pathway involved hydroxylation of phenol to give a mixture of catechol (CL) and hydroquinone (HQ), followed by the formation of a metal-catechol complex which was then rapidly oxidized into cis, cis -muconic acid (ccMA). [Display omitted] • Zirconium phosphate supported Cu(II) catalyst have been constructed. • The catalysts show superior performance for the oxidation of phenol to cis, cis- muconic acid. • There is the strong coordination between Cu(II) species and phosphate group of α-ZrP. • The forming Cu(II)-O-P linkage was active sites for the selective oxidation of phenol. • The interaction endows the supported Cu(II) catalysts with outstanding recyclability. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0926860X
- Volume :
- 664
- Database :
- Academic Search Index
- Journal :
- Applied Catalysis A: General
- Publication Type :
- Academic Journal
- Accession number :
- 170044399
- Full Text :
- https://doi.org/10.1016/j.apcata.2023.119351