Density functional theory study of CO catalytic oxidation on Co2B2/TiO2 (110) surface

被引：5

作者：

Zeng, Qingsong ^{[1
]}

Chen, Wenkai ^{[1
]}

Zhang, Yongfan ^{[1
]}

Dai, Wenxin ^{[2
]}

Guo, Xin ^{[3
]}

机构：

[1] Fuzhou Univ, Dept Chem, Fuzhou 350108, Fujian, Peoples R China

[2] Fuzhou Univ, Res Inst Photocatalysis, Coll Chem & Engn, Fuzhou 350002, Fujian, Peoples R China

[3] Huazhong Univ Sci & Technol, State Key Lab Coal Combust, Wuhan 410074, Hubei, Peoples R China

来源：

JOURNAL OF NATURAL GAS CHEMISTRY | 2010年 / 19卷 / 03期

基金：

中国国家自然科学基金;

关键词：

density functional theory; Co-B alloy; CO; TiO2; O-2; HYDROGEN STORAGE BEHAVIORS; FISCHER-TROPSCH CATALYSTS; AMORPHOUS ALLOY CATALYSTS; SELECTIVE HYDROGENATION; LOW-TEMPERATURE; B ALLOY; MAGNETIZATION; ADSORPTION; PARTICLES; MOLECULES;

D O I：

10.1016/S1003-9953(09)60058-X

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Titanium dioxide with CoB amorphous alloys nanoparticles deposited on the surface is known to exhibit higher catalytic activity than the CoB amorphous. A study of the structure of such system is necessary to understand this effect. A quantum chemical study of Co2B2 on the TiO2 (110) surface was studied using periodic slab model within the framework of density functional theory (DFT). The results of geometry optimization indicated that the most stable model of adsorption was Co2B2 cluster adsorbed on the hollow site of TiO2. The adsorption energy calculated for Co2B2 on the hollow site was 439.3 kJ/mol. The adsorption of CO and O-2 was further studied and the results indicated that CO and O-2 are preferred to adsorb on the Co-2 site. Co-adsorption of CO and O-2 shows that Co2B2/TiO2 is a good catalyst for the oxidation of CO to carbon dioxide in the presence of oxygen.

引用

页码：300 / 306

页数：7

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