Liquid Phase, Aerobic Oxidation of Benzyl Alcohol over the Catalyst System (Pt/TiO2+H2O)

被引：13

作者：

Kunene, Avela ^{[1
,2
]}

van Heerden, Tracey ^{[1
,2
]}

Gambu, Thobani G. ^{[1
,2
]}

van Steen, Eric ^{[1
,2
]}

机构：

[1] Univ Cape Town, Inst Catalysis, Cnr South Lane,Madiba Circle Private Bag X3, ZA-7701 Rondebosch, South Africa

[2] Univ Cape Town, Dept Chem Engn, Cnr South Lane,Madiba Circle Private Bag X3, ZA-7701 Rondebosch, South Africa

来源：

CHEMCATCHEM | 2020年 / 12卷 / 19期

基金：

新加坡国家研究基金会; 芬兰科学院;

关键词：

oxidation; liquid phase; water; Pt; TiO2; benzyl alcohol; INITIO MOLECULAR-DYNAMICS; OXYGEN REDUCTION REACTION; TOTAL-ENERGY CALCULATIONS; SELECTIVE OXIDATION; ULTRASOFT PSEUDOPOTENTIALS; CARBOXYLIC-ACIDS; WATER; NANOPARTICLES; PT(111); SIZE;

D O I：

10.1002/cctc.202000759

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Up to four different phases can be present in the heterogeneously catalyzed, liquid phase, aerobic oxidation of benzyl alcohol over Pt/TiO2. It is shown that the rate of benzyl alcohol oxidation is greatly enhanced upon addition of water to the initial reaction mixture but is not affected by the split between the two liquid phases. The rate of reaction correlates with the composition of water in the phase associated with the catalyst, i. e. the water-poor phase. Water may have various kinetic effects, e. g. a change in the distribution of surface species. It is argued on grounds of thermodynamic consistency that the liquid phase surrounding the catalyst is an intricate part of the catalyst in the aerobic benzyl alcohol oxidation over Pt/TiO2; water present in this liquid phase interacts with species on the surface altering the reaction kinetics.

引用

页码：4760 / 4764

页数：5

共 43 条

[1] Selective oxidation of alcohols to carbonyl compounds and carboxylic acids with platinum group metal catalysts [J].