TITLE:
Pt Supported on Plasma-Chemical Titanium Nitride for Efficient Room-Temperature CO Oxidation
AUTHORS:
David Correa Coyac, Eugene Kabachkov, Eugene Kurkin, Nikolay Vershinin, Igor Balikhin, Viktor Berestenko, Alexandre Michtchenko, Yury Shulga
KEYWORDS:
CO Oxidation, Titanium Nitride, Pt/TiN Catalysts, Carbon Monoxide, Microwave Plasma, Platinum Black, X-Ray Photoelectron Spectroscopy
JOURNAL NAME:
Modern Research in Catalysis,
Vol.11 No.1,
January
31,
2022
ABSTRACT: Catalysts of carbon monoxide oxidation were synthesized by deposition of
platinum on titanium nitride (TiN). Two substrates with an average particle
size of 18 and 36 nm were obtained by hydrogen reduction of titanium
tetrachloride in a stream of microwave plasma of nitrogen. The surface of the
catalysts was studied by X-ray photoelectron spectroscopy (XPS). The data
obtained by us in the present work indicate the presence of oxynitride as a
transition layer between nitride and oxide. It was found that the CO oxidation
rate on the 9 - 15 wt.% Pt loaded TiN catalysts is 120 times higher than that on the
platinum black with a specific surface of 30 m2/g. Increase in the reaction rate of CO oxidation on Pt/TiN catalysts as
compared to platinum black can be associated with both an increase in the
concentration of CO molecules adsorbed and a decrease in the activation energy
of the reaction. Catalysts are promising for use in catalytic air purification
systems.