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Abstract The catalytic activity of original and corroded Au54-0.7xCu28-0.3xAg18-2x(Ni2Zn)x (x = 0, 3, 6 and 9) alloys, together with their structure, hardness and morphology, are studied using various techniques. Alloying… Click to show full abstract
Abstract The catalytic activity of original and corroded Au54-0.7xCu28-0.3xAg18-2x(Ni2Zn)x (x = 0, 3, 6 and 9) alloys, together with their structure, hardness and morphology, are studied using various techniques. Alloying improves the hardness of the samples. There are some Ag/AgCl species on the surfaces of corroded samples. Chemical corrosion changes the surface orientation of the Au-rich solid solution, which is related to the rearrangement of Au atoms to accommodate surface defects. The surface orientation change and presence of Ag/AgCl increase the catalytic activity of the samples for the electro-oxidation of HCOOH.
Journal Title: Journal of Alloys and Compounds
Year Published: 2020
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