H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture
The influence of the reaction pathway of the sacrificial molecule oxidation to generate hydrogen is here investigated for lean and rich methanol reaction mixtures. Pt-TiO<sub>2</sub> powders promoted or not with tin sulfide were used as catalysts. With the help of in situ infrared experi...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Catalysts |
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| Online Access: | https://www.mdpi.com/2073-4344/12/4/402 |
| _version_ | 1797436414975016960 |
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| author | Irene Barba-Nieto Gerardo Colón Anna Kubacka Marcos Fernández-García |
| author_facet | Irene Barba-Nieto Gerardo Colón Anna Kubacka Marcos Fernández-García |
| author_sort | Irene Barba-Nieto |
| collection | DOAJ |
| description | The influence of the reaction pathway of the sacrificial molecule oxidation to generate hydrogen is here investigated for lean and rich methanol reaction mixtures. Pt-TiO<sub>2</sub> powders promoted or not with tin sulfide were used as catalysts. With the help of in situ infrared experiments under reaction conditions, methanol evolution was shown to take place by hole-related oxidation steps, with alkoxy and carbon-centered species as key radical species. The study analyzed quantitatively the fate and chemical use of the photons absorbed by the solids with the help of the quantum efficiency and the useful fraction of photons observables. Within this framework, the role of the sulfide component to promote photoactivity is interpreted, braiding chemical and photonic information. |
| first_indexed | 2024-03-09T11:02:22Z |
| format | Article |
| id | doaj.art-91cfcc1479074469ac9a9f60e4dc0fd7 |
| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-09T11:02:22Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Catalysts |
| spelling | doaj.art-91cfcc1479074469ac9a9f60e4dc0fd72023-12-01T01:11:10ZengMDPI AGCatalysts2073-43442022-04-0112440210.3390/catal12040402H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water MixtureIrene Barba-Nieto0Gerardo Colón1Anna Kubacka2Marcos Fernández-García3Instituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049 Madrid, SpainInstituto de Ciencia de Materiales de Sevilla, Centro Mixto CSIC-Universidad de Sevilla, C/Américo Vespucio 49, 41092 Sevilla, SpainInstituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049 Madrid, SpainInstituto de Catálisis y Petroleoquímica, CSIC, C/Marie Curie 2, 28049 Madrid, SpainThe influence of the reaction pathway of the sacrificial molecule oxidation to generate hydrogen is here investigated for lean and rich methanol reaction mixtures. Pt-TiO<sub>2</sub> powders promoted or not with tin sulfide were used as catalysts. With the help of in situ infrared experiments under reaction conditions, methanol evolution was shown to take place by hole-related oxidation steps, with alkoxy and carbon-centered species as key radical species. The study analyzed quantitatively the fate and chemical use of the photons absorbed by the solids with the help of the quantum efficiency and the useful fraction of photons observables. Within this framework, the role of the sulfide component to promote photoactivity is interpreted, braiding chemical and photonic information.https://www.mdpi.com/2073-4344/12/4/402H<sub>2</sub>quantum efficiencyfraction of useful photonsmechanism |
| spellingShingle | Irene Barba-Nieto Gerardo Colón Anna Kubacka Marcos Fernández-García H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture Catalysts H<sub>2</sub> quantum efficiency fraction of useful photons mechanism |
| title | H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture |
| title_full | H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture |
| title_fullStr | H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture |
| title_full_unstemmed | H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture |
| title_short | H<sub>2</sub> Photoproduction Efficiency: Implications of the Reaction Mechanism as a Function of the Methanol/Water Mixture |
| title_sort | h sub 2 sub photoproduction efficiency implications of the reaction mechanism as a function of the methanol water mixture |
| topic | H<sub>2</sub> quantum efficiency fraction of useful photons mechanism |
| url | https://www.mdpi.com/2073-4344/12/4/402 |
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