Solution Combustion Synthesis of Nanostructured NiCr2O4 Spinel and Its Catalytic Activity in CO Oxidation
V. A. Novikova, *, G. G. Xanthopouloub, **, and A. P. Amosova, ***
a Samara State Technical University, Samara, Russia
b Institute of Nanoscience and Nanotechnologies, NCSR Demokritos, Athens, Greece
Correspondence to: *e-mail: vladislav_novyi@mail.ru
Correspondence to: **e-mail: g.xanthopoulou@inn.demokritos.gr
Correspondence to: ***e-mail: egundor@yandex.ru
Received 11 May, 2021
Abstract—Nanoscale NiCr2O4 spinel powders were prepared by solution combustion synthesis (SCS) from aqueous solutions of chromium/nickel nitrates as oxidants, urea as a fuel, and nitric acid and characterized by SEM/EDS, XRD, and porosity measurements. The catalytic activity of synthesized powders in conversion of CO to CO2 was determined and compared with that of supported Pd catalysts. An optimized composition of starting solution afforded for preparation of powders containing 93% of NiCr2O4 spinel without additional calcining. This powder showed good CO-to-CO2 conversion in the temperature range 150–300°С and can be recommended for practical implementation.
Keywords: solution combustion synthesis, nickel chromite, catalytic activity, CO-to-CO2 conversion
DOI: 10.3103/S1061386221040075