| dc.creator | Zubimendi, J. L. | |
| dc.creator | Vázquez, L. | |
| dc.creator | Ocon, P. | |
| dc.creator | Vara, J. M. | |
| dc.creator | Triaca, Walter Enrique | |
| dc.creator | Salvarezza, Roberto Carlos | |
| dc.creator | Arvia, Alejandro Jorge | |
| dc.date | 1993-05-01 | |
| dc.date | 2019-09-05T15:04:08Z | |
| dc.identifier | http://sedici.unlp.edu.ar/handle/10915/80551 | |
| dc.identifier | issn:0022-3654 | |
| dc.description | The early stages of Pt electrodeposition (0.675-0.620 V vs RHE) on highly oriented pyrolytic graphite (HOPG) from chloroplatinic acid at 25 °C have been studied by ex-situ STM and SEM imaging complemented with electrochemical data. Nucleation and 3D growth of Pt initiate at HOPG surface defects. Large Pt agglomerates containing flat crystallites with well-defined geometries are found around HOPG steps. Pt crystallites formed by 1-2 nm size clusters become more compact as the electrodeposition potential is shifted negatively or the Pt electrodeposited charge is increased. High-resolution STM imaging reveals large uncovered HOPG areas with the nearest-neighbor C-C distance d = 0.24 ± 0.02 nm and fiat hexagonal Pt crystallites. Electrochemical data combined with STM imaging can be interpreted in terms of a diffusion-controlled Pt(IV) to Pt(II) reaction at HOPG and a surface reaction leading to Pt(0) at HOPG defects. | |
| dc.description | Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA) | |
| dc.description | Facultad de Ciencias Exactas | |
| dc.format | application/pdf | |
| dc.format | 5095-5102 | |
| dc.language | en | |
| dc.rights | http://creativecommons.org/licenses/by-nc-sa/4.0/ | |
| dc.rights | Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) | |
| dc.subject | Ciencias Exactas | |
| dc.subject | Química | |
| dc.subject | scanning tunneling microscopy | |
| dc.subject | Platino (Metal) | |
| dc.subject | pyrolitic graphite | |
| dc.subject | electrodeposition | |
| dc.subject | scanning electron microscopy | |
| dc.subject | Electroquímica | |
| dc.title | Early stages of platinum electrodeposition on highly oriented pyrolytic graphite: scanning tunneling microscopy imaging and reaction pathway | |
| dc.type | Articulo | |
| dc.type | Articulo | |
