The characterization of the process of electrochemical oxidation of Cu2S into CuO nanowires by using transmission electron microscopy

Resumen del póster presentado al Microscopy at the Frontiers of Science Congress Series (MFS), celebrado en el Parque de las Ciencias de Granada (España) del 11 al 13 de septiembre de 2019.Transition metal oxides and hydroxides serving as the main alternative to the corresponding noble metals play an enormous role in catalytic conversion. There are many methods to synthesize these nanostructures. Compared with metal oxides, metal chalcogenides are thermodynamic unstable and are inclined to transform into more stable oxides or hydroxides during oxygen evolution in alkaline media. Interestingly, the transformation of structures and chemical compositions of the copper sulfides makes corresponding copper oxide display high electrocatalytic performance. The detailed TEM-STEM characterization and EELS chemical analysis at the nanoscale has been employed to elucidate the formation and morphology evolution of this transformation. By studying the mechanism of this electrochemical oxidation process, we could get more information about intermediate stages which could be extended to more systems.Peer reviewe