Unravelling the reaction mechanism and structure-performance relationship for selective oxidation of ethylene glycol over Pt/Al2O3 catalyst

IF 3.9 2区化学 Q2 CHEMISTRY, PHYSICAL Molecular Catalysis Pub Date : 2025-03-19 DOI:10.1016/j.mcat.2025.115035

Shiping Wu , Yanhong Quan , Shunan Yin , Jun Ren

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Abstract

A series of Pt/Al₂O₃ catalysts were fabricated by finely adjusting the amount of platinum and investigated in the selective oxidative of ethylene glycol (EG) to glycolic acid (GA) under mild neutral conditions. The 0.90Pt/Al₂O₃ catalyst showed the maximum turnover frequency (TOF: 1106.6 h⁻¹) with the EG conversion of 74.2 % and GA selectivity of 90.2 %. A strong linear relationship between TOF values and Pt⁰concentration was revealed, confirming that Pt⁰ species serves as the active sites for GA formation. In addition, in situ diffused reflectance infrared Fourier transform spectroscopy (DRIFTS) results verify the reaction pathways of EG oxidation as follows: C₂H₆O₂ → HOCH₂CHO → HOCH₂COOH. This work unraveled structure-performance relationship for the selective EG oxidation over Pt/Al₂O₃ catalyst, providing important guidance for the design of efficient noble catalysts especially for the oxidation reaction of polyols.

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来源期刊

Molecular Catalysis Chemical Engineering-Process Chemistry and Technology

CiteScore

6.90

自引率

10.90%

发文量

700

审稿时长

40 days

期刊介绍： Molecular Catalysis publishes full papers that are original, rigorous, and scholarly contributions examining the molecular and atomic aspects of catalytic activation and reaction mechanisms. The fields covered are: Heterogeneous catalysis including immobilized molecular catalysts Homogeneous catalysis including organocatalysis, organometallic catalysis and biocatalysis Photo- and electrochemistry Theoretical aspects of catalysis analyzed by computational methods