{"title":"Unravelling the reaction mechanism and structure-performance relationship for selective oxidation of ethylene glycol over Pt/Al2O3 catalyst","authors":"Shiping Wu , Yanhong Quan , Shunan Yin , Jun Ren","doi":"10.1016/j.mcat.2025.115035","DOIUrl":null,"url":null,"abstract":"<div><div>A series of Pt/Al<sub>2</sub>O<sub>3</sub> 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/Al<sub>2</sub>O<sub>3</sub> catalyst showed the maximum turnover frequency (TOF: 1106.6 h<sup>−1</sup>) with the EG conversion of 74.2 % and GA selectivity of 90.2 %. A strong linear relationship between TOF values and Pt<sup>0</sup>concentration was revealed, confirming that Pt<sup>0</sup> species serves as the active sites for GA formation. In addition, <em>in situ</em> diffused reflectance infrared Fourier transform spectroscopy (DRIFTS) results verify the reaction pathways of EG oxidation as follows: C<sub>2</sub>H<sub>6</sub>O<sub>2</sub> → HOCH<sub>2</sub>CHO → HOCH<sub>2</sub>COOH. This work unraveled structure-performance relationship for the selective EG oxidation over Pt/Al<sub>2</sub>O<sub>3</sub> catalyst, providing important guidance for the design of efficient noble catalysts especially for the oxidation reaction of polyols.</div></div>","PeriodicalId":393,"journal":{"name":"Molecular Catalysis","volume":"578 ","pages":"Article 115035"},"PeriodicalIF":4.9000,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Molecular Catalysis","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2468823125002214","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
引用次数: 0
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.
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
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