Superior electrocatalytic Activity of Au(110)-Like Gold Nanoparticles Towards The Oxygen Evolution Reaction
- Citation:
- Othman, S. H., M. S. El-Deab, and T. Ohsaka, "Superior electrocatalytic Activity of Au(110)-Like Gold Nanoparticles Towards The Oxygen Evolution Reaction", Int. J. Electrochemical Science, 2011.
Abstract:
This study is concerned with the electocatalytic evolution of oxygen gas at novel gold nanoparticles (nano-Au) modified glassy carbon (GC) electrodes in 0.5 M KOH. The electrochemical measurements show a superior enhancement of the nano-Au/GC towards the oxygen evolution reaction (OER) compared to bulk GC and Au electrodes. That is, the onset potential of the OER is shifted by ca. 600 mV in the negative direction compared with bulk Au and unmodified GC electrodes. The enrichment in the Au (110) facet orientation (of the electrodeposited nano-Au) [1] at the expense of other low facets orientations induces a favorable geometric arrangements of the Au surface atoms which is believed to facilitate the OH- adsorption and, hence, the charge transfer process during the water electrolysis into molecular oxygen. Thus, the OER is accelerated and realized at less positive potential.
Notes:
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