Photodeposition of Au nanocatalysts onto CuCrO2 powders

Abstract

In this research, Au nanocatalysts were deposited on CuCrO2 powders using photodeposition to investigate the catalytic activity. Delafossite-type CuCrO2 porous powders were prepared using a glycine nitrate process. Au nanoparticles were photodeposited onto the CuCrO2 surface by irradiating light into pH adjusted HAuCl4 solution. The crystal structure, composition, and micromorphology of the derived Au/CuCrO 2 powders were characterized by X-ray diffraction, X-ray fluorescence, scanning electron microscopy, and transmission electron microscopy (TEM), respectively. TEM observation determined that the diameters of the Au nanoparticles photodeposited on CuCrO2 powder with UV irradiation at pH = 10 were approximately 4 nm. The differential scanning calorimetric measurement indicated that Au/CuCrO2 has a catalytic activity of carbon monoxide conversion. © 2014 The Ceramic Society of Japan. All rights reserved.