Influence of the Preparation Method of Au, Pd, Pt, and Rh/TiO2 Nanostructures and Their Catalytic Activity on the CO Oxidation at Low Temperature

被引：16

作者：

Camposeco, R. ^{[1
]}

Torres, A. E. ^{[1
]}

Zanella, R. ^{[1
]}

机构：

[1] Univ Nacl Autonoma Mexico, Inst Ciencias Aplicadas & Tecnol, Nacl Autonoma Mexico, Circuito Exterior S-N,CU, Mexico City 04510, DF, Mexico

来源：

TOPICS IN CATALYSIS | 2022年 / 65卷 / 7-8期

关键词：

Nanoparticles; CO oxidation; Synthesis; Dispersion; INITIO MOLECULAR-DYNAMICS; TOTAL-ENERGY CALCULATIONS; DEPOSITION-PRECIPITATION; NANOTUBE ARRAYS; TIO2; OXIDE; PHOTOCATALYSIS; STABILITY; RH; HYDROGENATION;

D O I：

10.1007/s11244-022-01607-4

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Au/TiO2, Pd/TiO2, Pt/TiO2 and Rh/TiO2 catalysts were synthesized by the deposition-precipitation with urea (DPU) and sol-gel (SG) methods to elucidate the influence of the preparation method on the catalytic activity in the CO oxidation at low temperature. In all cases, the metal loading was 1 wt%. The effect of the synthesis method was remarkable for the Au/TiO2 and Pd/TiO2 materials and less important for the Pt/TiO2 and Rh/TiO2 materials. However, for the four materials, the DPU method revealed the most active materials at 0 degrees C with respect to the sol-gel method. Au/TiO2 and Rh/TiO2, obtained by the DPU method, were active at temperatures below 0 degrees C and showed outstanding catalytic activity in comparison with the Pd/TiO2 and Pt/TiO2 catalysts. Density Functional Theory based calculations on M-13/TiO2 (M = Au, Pd, Pt or Rh) structures revealed a superior charge transfer from a defective support to Au, while Rh triggered O-2 bond scission in the oxygen vacancy site located in the metal-support interface.

引用

页码：798 / 816

页数：19

共 55 条

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