Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production
The design of photocathodes for the hydrogen evolution reaction (HER), which suitably couple dye-sensitized p-type semiconductors and a hydrogen evolving catalyst (HEC), currently represents an important target in the quest for artificial photosynthesis. In the present manuscript, we report on a sys...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-05-01
|
| Series: | Applied Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2076-3417/12/10/4955 |
| _version_ | 1797501828355588096 |
|---|---|
| author | Federico Droghetti Elisabetta Benazzi Rita Boaretto Mirco Natali |
| author_facet | Federico Droghetti Elisabetta Benazzi Rita Boaretto Mirco Natali |
| author_sort | Federico Droghetti |
| collection | DOAJ |
| description | The design of photocathodes for the hydrogen evolution reaction (HER), which suitably couple dye-sensitized p-type semiconductors and a hydrogen evolving catalyst (HEC), currently represents an important target in the quest for artificial photosynthesis. In the present manuscript, we report on a systematic evaluation of simple methods for the deposition of Pt metal onto dye-sensitized NiO electrodes. The standard <b>P1</b> dye was taken as the chromophore of choice and two different NiO substrates were considered. Both potentiostatic and potentiodynamic procedures were evaluated either with or without the inclusion of an additional light bias. Photoelectrochemical characterization of the resulting electrodes in an aqueous solution at pH 4 showed that all the methods tested are effective to attain photocathodes for hydrogen production. The best performances (maximum photocurrent densities of −40 µA·cm<sup>−2</sup>, IPCE of 0.18%, and ~60% Faradaic yield) were achieved using appreciably fast, light-assisted deposition routes, which are associated with the growth of small Pt islands homogenously distributed on the sensitized NiO. |
| first_indexed | 2024-03-10T03:24:13Z |
| format | Article |
| id | doaj.art-306e6f6996c346e1b254e3bb0d5308c9 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T03:24:13Z |
| publishDate | 2022-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-306e6f6996c346e1b254e3bb0d5308c92023-11-23T09:55:35ZengMDPI AGApplied Sciences2076-34172022-05-011210495510.3390/app12104955Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen ProductionFederico Droghetti0Elisabetta Benazzi1Rita Boaretto2Mirco Natali3Department of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, ItalyDepartment of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, ItalyDepartment of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, ItalyDepartment of Chemical, Pharmaceutical and Agricultural Sciences (DOCPAS), University of Ferrara, Via L. Borsari 46, 44121 Ferrara, ItalyThe design of photocathodes for the hydrogen evolution reaction (HER), which suitably couple dye-sensitized p-type semiconductors and a hydrogen evolving catalyst (HEC), currently represents an important target in the quest for artificial photosynthesis. In the present manuscript, we report on a systematic evaluation of simple methods for the deposition of Pt metal onto dye-sensitized NiO electrodes. The standard <b>P1</b> dye was taken as the chromophore of choice and two different NiO substrates were considered. Both potentiostatic and potentiodynamic procedures were evaluated either with or without the inclusion of an additional light bias. Photoelectrochemical characterization of the resulting electrodes in an aqueous solution at pH 4 showed that all the methods tested are effective to attain photocathodes for hydrogen production. The best performances (maximum photocurrent densities of −40 µA·cm<sup>−2</sup>, IPCE of 0.18%, and ~60% Faradaic yield) were achieved using appreciably fast, light-assisted deposition routes, which are associated with the growth of small Pt islands homogenously distributed on the sensitized NiO.https://www.mdpi.com/2076-3417/12/10/4955hydrogenartificial photosynthesisphotocathodenickel oxideplatinum |
| spellingShingle | Federico Droghetti Elisabetta Benazzi Rita Boaretto Mirco Natali Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production Applied Sciences hydrogen artificial photosynthesis photocathode nickel oxide platinum |
| title | Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production |
| title_full | Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production |
| title_fullStr | Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production |
| title_full_unstemmed | Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production |
| title_short | Evaluation of Pt Deposition onto Dye-Sensitized NiO Photocathodes for Light-Driven Hydrogen Production |
| title_sort | evaluation of pt deposition onto dye sensitized nio photocathodes for light driven hydrogen production |
| topic | hydrogen artificial photosynthesis photocathode nickel oxide platinum |
| url | https://www.mdpi.com/2076-3417/12/10/4955 |
| work_keys_str_mv | AT federicodroghetti evaluationofptdepositionontodyesensitizedniophotocathodesforlightdrivenhydrogenproduction AT elisabettabenazzi evaluationofptdepositionontodyesensitizedniophotocathodesforlightdrivenhydrogenproduction AT ritaboaretto evaluationofptdepositionontodyesensitizedniophotocathodesforlightdrivenhydrogenproduction AT mirconatali evaluationofptdepositionontodyesensitizedniophotocathodesforlightdrivenhydrogenproduction |