Electrodeposition of Platinum Black on Brass
Platinum exhibits essential characteristics for enhancing electrochemical processes, but the use of electrodes made entirely of Pt is not cost-effective. A more affordable alternative is electrodepositing Pt black on accessible metallic surfaces, such as brass, to ensure that the electrodes are both...
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MDPI AG
2025-04-01
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| Online Access: | https://www.mdpi.com/2571-9637/8/2/25 |
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| author | Gustavo A. Maldonado Bautista Víctor E. Reyes Cruz Felipe M. Galleguillos Madrid Jose A. Cobos Murcia Gustavo Urbano Reyes Miguel Pérez Labra Carlos Portillo |
| author_facet | Gustavo A. Maldonado Bautista Víctor E. Reyes Cruz Felipe M. Galleguillos Madrid Jose A. Cobos Murcia Gustavo Urbano Reyes Miguel Pérez Labra Carlos Portillo |
| author_sort | Gustavo A. Maldonado Bautista |
| collection | DOAJ |
| description | Platinum exhibits essential characteristics for enhancing electrochemical processes, but the use of electrodes made entirely of Pt is not cost-effective. A more affordable alternative is electrodepositing Pt black on accessible metallic surfaces, such as brass, to ensure that the electrodes are both resistant to corrosive environments and possess catalytic capabilities. Pourbaix and kinetic analyses were performed to establish the optimal potential and current conditions for electrodepositing Pt black on brass utilizing a Pb-free Pt solution. The Pourbaix analysis indicated that Pt electrodeposition is achieved from the PtCl<sub>6</sub><sup>−</sup> ionic species and occurs before hydrogen evolution. Kinetic studies further revealed that Pt black nanoscale deposition on a brass surface requires mechanical surface treatment and electrochemical polishing, followed by metallic Pt electrodeposition under potentiostatic control at −295 mV vs. SCE. Subsequent Pt black deposition was achieved under galvanostatic control at −500 A cm<sup>−2</sup>. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) confirmed the formation of nanostructures of metallic Pt and Pt black on brass, with the latter presenting a larger surface area to enhance the active sites for catalysis in electrochemical processes. |
| format | Article |
| id | doaj-art-d661c5e2a1e34e5fa8194bb5747152bb |
| institution | Kabale University |
| issn | 2571-9637 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Surfaces |
| spelling | doaj-art-d661c5e2a1e34e5fa8194bb5747152bb2025-08-20T03:27:22ZengMDPI AGSurfaces2571-96372025-04-01822510.3390/surfaces8020025Electrodeposition of Platinum Black on BrassGustavo A. Maldonado Bautista0Víctor E. Reyes Cruz1Felipe M. Galleguillos Madrid2Jose A. Cobos Murcia3Gustavo Urbano Reyes4Miguel Pérez Labra5Carlos Portillo6Área Académica de Ciencias de la Tierra y Materiales, Instituto de Ciencias Basicas e Ingenieria, Universidad Autónoma del Estado de Hidalgo, Pachuca 42184, MexicoÁrea Académica de Ciencias de la Tierra y Materiales, Instituto de Ciencias Basicas e Ingenieria, Universidad Autónoma del Estado de Hidalgo, Pachuca 42184, MexicoCentro-de-Desarrollo Energético-de-Antofagasta, Universidad de Antofagasta, Antofagasta 1271155, ChileÁrea Académica de Ciencias de la Tierra y Materiales, Instituto de Ciencias Basicas e Ingenieria, Universidad Autónoma del Estado de Hidalgo, Pachuca 42184, MexicoÁrea Académica de Ciencias de la Tierra y Materiales, Instituto de Ciencias Basicas e Ingenieria, Universidad Autónoma del Estado de Hidalgo, Pachuca 42184, MexicoÁrea Académica de Ciencias de la Tierra y Materiales, Instituto de Ciencias Basicas e Ingenieria, Universidad Autónoma del Estado de Hidalgo, Pachuca 42184, MexicoCentro-de-Desarrollo Energético-de-Antofagasta, Universidad de Antofagasta, Antofagasta 1271155, ChilePlatinum exhibits essential characteristics for enhancing electrochemical processes, but the use of electrodes made entirely of Pt is not cost-effective. A more affordable alternative is electrodepositing Pt black on accessible metallic surfaces, such as brass, to ensure that the electrodes are both resistant to corrosive environments and possess catalytic capabilities. Pourbaix and kinetic analyses were performed to establish the optimal potential and current conditions for electrodepositing Pt black on brass utilizing a Pb-free Pt solution. The Pourbaix analysis indicated that Pt electrodeposition is achieved from the PtCl<sub>6</sub><sup>−</sup> ionic species and occurs before hydrogen evolution. Kinetic studies further revealed that Pt black nanoscale deposition on a brass surface requires mechanical surface treatment and electrochemical polishing, followed by metallic Pt electrodeposition under potentiostatic control at −295 mV vs. SCE. Subsequent Pt black deposition was achieved under galvanostatic control at −500 A cm<sup>−2</sup>. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) confirmed the formation of nanostructures of metallic Pt and Pt black on brass, with the latter presenting a larger surface area to enhance the active sites for catalysis in electrochemical processes.https://www.mdpi.com/2571-9637/8/2/25electrodepositionplatinum blackbrassmetallic nanostructures |
| spellingShingle | Gustavo A. Maldonado Bautista Víctor E. Reyes Cruz Felipe M. Galleguillos Madrid Jose A. Cobos Murcia Gustavo Urbano Reyes Miguel Pérez Labra Carlos Portillo Electrodeposition of Platinum Black on Brass Surfaces electrodeposition platinum black brass metallic nanostructures |
| title | Electrodeposition of Platinum Black on Brass |
| title_full | Electrodeposition of Platinum Black on Brass |
| title_fullStr | Electrodeposition of Platinum Black on Brass |
| title_full_unstemmed | Electrodeposition of Platinum Black on Brass |
| title_short | Electrodeposition of Platinum Black on Brass |
| title_sort | electrodeposition of platinum black on brass |
| topic | electrodeposition platinum black brass metallic nanostructures |
| url | https://www.mdpi.com/2571-9637/8/2/25 |
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