Oxygen Reduction on Polycrystalline Pt and Au Electrodes in Perchloric Acid Solution in the Presence of Acetonitrile
Abstract
Oxygen reduction reaction (ORR) was studied on polycrystalline Pt and Au electrodes in 0.1 M HClO(4) solutions containing various amounts of acetonitrile (AcN). The state of the electrode surface was characterized by cyclic voltammetry in oxygen free electrolytes, while ORR studies were performed on polycrystalline Pt and Au rotating disc electrodes by a linear sweep voltammetry in oxygen saturated electrolytes. Acetonitrile is chemisorbed on Pt over a wide potential range inhibiting both H adsorption and oxide formation. The extent of AcN chemisorption depends on its concentration in the solution. Initial potential of oxygen reduction is shifted negatively, while the kinetics of ORR is increasingly hindered with the increase of AcN concentration. Inhibiting effect of acetonitrile on ORR is pronounced on both Pt(poly) and Au(poly). Complete inhibition of ORR in the potential range of AcN chemisorptions is achieved for 0.1 M HClO(4) solution containing 1 M AcN on Au(poly) and 3 M AcN on... Pt(poly).
Keywords:
Oxygen reduction / platinum / gold / acetonitrile / perchloric acid / rotating disc electrodeSource:
International Journal of Electrochemical Science, 2011, 6, 8, 3344-3354Publisher:
- Esg, Belgrade
Funding / projects:
- Functional, Functionalized and Advanced Nanomaterials (RS-MESTD-Integrated and Interdisciplinary Research (IIR or III)-45005)
Collections
Institution/Community
IHTMTY - JOUR AU - Srejić, Irina AU - Smiljanić, Milutin AU - Rakočević, Zlatko Lj. AU - Štrbac, Svetlana PY - 2011 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/825 AB - Oxygen reduction reaction (ORR) was studied on polycrystalline Pt and Au electrodes in 0.1 M HClO(4) solutions containing various amounts of acetonitrile (AcN). The state of the electrode surface was characterized by cyclic voltammetry in oxygen free electrolytes, while ORR studies were performed on polycrystalline Pt and Au rotating disc electrodes by a linear sweep voltammetry in oxygen saturated electrolytes. Acetonitrile is chemisorbed on Pt over a wide potential range inhibiting both H adsorption and oxide formation. The extent of AcN chemisorption depends on its concentration in the solution. Initial potential of oxygen reduction is shifted negatively, while the kinetics of ORR is increasingly hindered with the increase of AcN concentration. Inhibiting effect of acetonitrile on ORR is pronounced on both Pt(poly) and Au(poly). Complete inhibition of ORR in the potential range of AcN chemisorptions is achieved for 0.1 M HClO(4) solution containing 1 M AcN on Au(poly) and 3 M AcN on Pt(poly). PB - Esg, Belgrade T2 - International Journal of Electrochemical Science T1 - Oxygen Reduction on Polycrystalline Pt and Au Electrodes in Perchloric Acid Solution in the Presence of Acetonitrile VL - 6 IS - 8 SP - 3344 EP - 3354 UR - https://hdl.handle.net/21.15107/rcub_cer_825 ER -
@article{ author = "Srejić, Irina and Smiljanić, Milutin and Rakočević, Zlatko Lj. and Štrbac, Svetlana", year = "2011", abstract = "Oxygen reduction reaction (ORR) was studied on polycrystalline Pt and Au electrodes in 0.1 M HClO(4) solutions containing various amounts of acetonitrile (AcN). The state of the electrode surface was characterized by cyclic voltammetry in oxygen free electrolytes, while ORR studies were performed on polycrystalline Pt and Au rotating disc electrodes by a linear sweep voltammetry in oxygen saturated electrolytes. Acetonitrile is chemisorbed on Pt over a wide potential range inhibiting both H adsorption and oxide formation. The extent of AcN chemisorption depends on its concentration in the solution. Initial potential of oxygen reduction is shifted negatively, while the kinetics of ORR is increasingly hindered with the increase of AcN concentration. Inhibiting effect of acetonitrile on ORR is pronounced on both Pt(poly) and Au(poly). Complete inhibition of ORR in the potential range of AcN chemisorptions is achieved for 0.1 M HClO(4) solution containing 1 M AcN on Au(poly) and 3 M AcN on Pt(poly).", publisher = "Esg, Belgrade", journal = "International Journal of Electrochemical Science", title = "Oxygen Reduction on Polycrystalline Pt and Au Electrodes in Perchloric Acid Solution in the Presence of Acetonitrile", volume = "6", number = "8", pages = "3344-3354", url = "https://hdl.handle.net/21.15107/rcub_cer_825" }
Srejić, I., Smiljanić, M., Rakočević, Z. Lj.,& Štrbac, S.. (2011). Oxygen Reduction on Polycrystalline Pt and Au Electrodes in Perchloric Acid Solution in the Presence of Acetonitrile. in International Journal of Electrochemical Science Esg, Belgrade., 6(8), 3344-3354. https://hdl.handle.net/21.15107/rcub_cer_825
Srejić I, Smiljanić M, Rakočević ZL, Štrbac S. Oxygen Reduction on Polycrystalline Pt and Au Electrodes in Perchloric Acid Solution in the Presence of Acetonitrile. in International Journal of Electrochemical Science. 2011;6(8):3344-3354. https://hdl.handle.net/21.15107/rcub_cer_825 .
Srejić, Irina, Smiljanić, Milutin, Rakočević, Zlatko Lj., Štrbac, Svetlana, "Oxygen Reduction on Polycrystalline Pt and Au Electrodes in Perchloric Acid Solution in the Presence of Acetonitrile" in International Journal of Electrochemical Science, 6, no. 8 (2011):3344-3354, https://hdl.handle.net/21.15107/rcub_cer_825 .