The influence of pH on reaction pathways for O2 reduction on the Au(100) face
Abstract
Oxygen reduction on the Au(100) face was studied by the rotating disk-ring electrode technique in solutions of anions which adsorb strongly on gold (HSO4-/SO42- and/or OH-) over the entire pH range. The specific adsorption of OH- anions, which is a pH dependent process, is found to play the key role in determining the reaction pathways. In the absence of OH- adsorption, for pHs below 6, the reduction of O-2 begins as a 2e-process. Due to the increase in local pH during O-2 reduction, the reaction pathway turns into a 4e-reduction at a certain potential depending on the pH of the solution. For pHs higher than 6, O-2 reduction begins as a 4e-process in the potential region where specifically adsorbed OH- anions are present.
Keywords:
Gold single crystal / Oxygen reduction / pH / Reaction pathways / Rotating disk-ringSource:
Electrochimica Acta, 1996, 41, 18, 2903-2908Publisher:
- Elsevier
DOI: 10.1016/0013-4686(96)00120-X
ISSN: 0013-4686
WoS: A1996VK15100015
Scopus: 2-s2.0-0030576814
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Institution/Community
IHTMTY - JOUR AU - Štrbac, Svetlana AU - Adžić, Radoslav R. PY - 1996 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4350 AB - Oxygen reduction on the Au(100) face was studied by the rotating disk-ring electrode technique in solutions of anions which adsorb strongly on gold (HSO4-/SO42- and/or OH-) over the entire pH range. The specific adsorption of OH- anions, which is a pH dependent process, is found to play the key role in determining the reaction pathways. In the absence of OH- adsorption, for pHs below 6, the reduction of O-2 begins as a 2e-process. Due to the increase in local pH during O-2 reduction, the reaction pathway turns into a 4e-reduction at a certain potential depending on the pH of the solution. For pHs higher than 6, O-2 reduction begins as a 4e-process in the potential region where specifically adsorbed OH- anions are present. PB - Elsevier T2 - Electrochimica Acta T1 - The influence of pH on reaction pathways for O2 reduction on the Au(100) face VL - 41 IS - 18 SP - 2903 EP - 2908 DO - 10.1016/0013-4686(96)00120-X ER -
@article{ author = "Štrbac, Svetlana and Adžić, Radoslav R.", year = "1996", abstract = "Oxygen reduction on the Au(100) face was studied by the rotating disk-ring electrode technique in solutions of anions which adsorb strongly on gold (HSO4-/SO42- and/or OH-) over the entire pH range. The specific adsorption of OH- anions, which is a pH dependent process, is found to play the key role in determining the reaction pathways. In the absence of OH- adsorption, for pHs below 6, the reduction of O-2 begins as a 2e-process. Due to the increase in local pH during O-2 reduction, the reaction pathway turns into a 4e-reduction at a certain potential depending on the pH of the solution. For pHs higher than 6, O-2 reduction begins as a 4e-process in the potential region where specifically adsorbed OH- anions are present.", publisher = "Elsevier", journal = "Electrochimica Acta", title = "The influence of pH on reaction pathways for O2 reduction on the Au(100) face", volume = "41", number = "18", pages = "2903-2908", doi = "10.1016/0013-4686(96)00120-X" }
Štrbac, S.,& Adžić, R. R.. (1996). The influence of pH on reaction pathways for O2 reduction on the Au(100) face. in Electrochimica Acta Elsevier., 41(18), 2903-2908. https://doi.org/10.1016/0013-4686(96)00120-X
Štrbac S, Adžić RR. The influence of pH on reaction pathways for O2 reduction on the Au(100) face. in Electrochimica Acta. 1996;41(18):2903-2908. doi:10.1016/0013-4686(96)00120-X .
Štrbac, Svetlana, Adžić, Radoslav R., "The influence of pH on reaction pathways for O2 reduction on the Au(100) face" in Electrochimica Acta, 41, no. 18 (1996):2903-2908, https://doi.org/10.1016/0013-4686(96)00120-X . .