Effect of Gold Nanoparticles on MnOx/TiO2 Nanostructures for Improving the CO Oxidation at Low Temperature

• Published in: Topics in catalysis Vol. 63; no. 5-6; pp. 492 - 503
• Main Authors: Camposeco, Roberto, Castillo, Salvador, Nava, Noel, Medina, Juan Carlos, Zanella, Rodolfo
• Format: Journal Article
• Language: English
• Published: New York Springer US 2020; Springer Nature B.V
• Subjects: Carbon monoxide; Catalysis; Catalysts; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Dispersion; Gold; Industrial Chemistry/Chemical Engineering; Low temperature; Nanoparticles; Original Paper; Oxidation; Pharmacy; Physical Chemistry; Room temperature; Titanium dioxide; Deposition–precipitation; Sol–gel; CO oxidation; Gold nanoparticles; MnO
• ISSN: 1022-5528; 1572-9028
• DOI: 10.1007/s11244-019-01220-y

Gold nanoparticles dispersed on MnO
x
/TiO
2
were used to perform the oxidation of carbon monoxide at low temperatures. Remarkable dispersion of gold nanoparticles under hydrogen treatment was obtained, mainly in Au–MnO
x
/TiO
2
catalysts with 2 wt% Au and 5 wt% Mn, where the Au nanoparticles displayed average sizes of 1–3 nm. The addition of Au nanoparticles to the MnO
x
/TiO
2
catalysts promoted both the CO oxidation from 0 °C and stability at room temperature. This behavior could be attributed to the synergistic interactions between Au
0
/Au
1+
and Mn
3+
/Mn
4+
on the Au–MnO
x
/TiO
2
catalyst surface.