Microstructure studies in nanoporous Au: Effects on electro-oxidation. (15th March 2018)

• Record Type: Journal Article
• Authors: Lakshmanan, C.; Behera, A.K.; Viswanath, R.N.; Amirthapandian, S.; Rajaraman, R.; Amarendra, G.
• Is Part Of: Scripta materialia. Number 146(2018)
• Page Start: 68
• Page End: 72
• Publication Date: 2018-03-15
• Subjects: Nanoporous Au -- Electro-oxidation of Au -- Stacking fault tetrahedra -- High resolution transmission electron microscopy -- Cyclic voltammetry; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.11.018
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Electrochemical measurements combined with high resolution transmission electron microscopy studies have been used to follow the microstructure changes in nanoporous Au subjected to electro-oxidation and oxygen reduction reactions. The microscopy results reveal that different types of lattice defects such as stacking fault tetrahedra present in as-dealloyed and oxide formed nanoporous Au. It is shown that Au inter-planar spacing in the defect concentrated regions in as-dealloyed nanoporous Au has increased by 8%. This anomalous change may be attributed to the binding of oxygen containing ads-species in the electrolyte on Au atoms, albeit weakly, in the presence of defects. Graphical abstract: Image 1