Surface oxidation of gold nanoparticles supported on a glassy carbon electrode in sulphuric acid medium: contrasts with the behaviour of 'macro' gold.
Consecutive electro-oxidation and reduction cycling of gold macroelectrodes in sulphuric acid medium is a widely-used cleaning and calibration procedure. In this paper this method is applied to electrodeposited nanoparticles revealing significant differences in the electro-oxidation process and the cleaning effectiveness. This suggests a higher density of surface defects on the nanoparticles.
Department of Chemistry, Physical and Theoretical Chemistry Laboratory, Oxford University, South Parks Road, Oxford, OX1 3QZ, UK.
Ying
Y
Wang
Eduardo
E
Laborda
Alison
A
Crossley
Richard G
RG
Compton
D002244:Carbon / Q000737:chemistry*; D004566:Electrodes; D005898:Glass / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010084:Oxidation-Reduction; D013464:Sulfuric Acids / Q000737:chemistry*; D013499:Surface Properties
D013464:Sulfuric Acids; D002244:Carbon; D006046:Gold; C033158:sulfuric acid