Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition
- Autores
- Teixeira Da Silva, V.; Sousa, L. A.; Amorim, R. M.; Andrini, Leandro Rubén; Figueroa, S. J. A.; Requejo, Félix Gregorio; Vicentini, Flavio C.
- Año de publicación
- 2011
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- The addition of small amounts of palladium (0.1%, 0.5% and 1.0% w/w) to a NixPyOz/SiO2 sample led to a decrease of ∼200 K in the synthesis temperature of Ni2P/SiO2, allowing synthesis to proceed at 723 K. In situ X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES) experiments demonstrated that the phosphate → phosphide transformation started at approximately 673 K, and the total time to reduce the phosphate phase was decreased by the presence of palladium. Based on the in situ P K-edge XANES experiments and CO chemisorption uptakes, it was proposed that, depending on the amount of palladium incorporated, the final catalysts present different degrees of reduction, thereby impacting catalytic activity. An increase in activity was observed for the palladium-containing samples during time on stream, which might be associated with the formation of a phosphosulfide active species. The extent of the phosphosulfide species formation was dependent on the degree of reduction.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Centro de Investigación y Desarrollo en Ciencias Aplicadas - Materia
-
Ciencias Exactas
Física
Química
Nickel phosphide
Thiophene hydrodesulfurization
X-ray near-edge structure
Níquel
Rayos X - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- http://creativecommons.org/licenses/by-nc-sa/4.0/
- Repositorio
.jpg)
- Institución
- Universidad Nacional de La Plata
- OAI Identificador
- oai:sedici.unlp.edu.ar:10915/84267
Ver los metadatos del registro completo
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Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium additionTeixeira Da Silva, V.Sousa, L. A.Amorim, R. M.Andrini, Leandro RubénFigueroa, S. J. A.Requejo, Félix GregorioVicentini, Flavio C.Ciencias ExactasFísicaQuímicaNickel phosphideThiophene hydrodesulfurizationX-ray near-edge structureNíquelRayos XThe addition of small amounts of palladium (0.1%, 0.5% and 1.0% w/w) to a NixPyOz/SiO<sub>2</sub> sample led to a decrease of ∼200 K in the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub>, allowing synthesis to proceed at 723 K. In situ X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES) experiments demonstrated that the phosphate → phosphide transformation started at approximately 673 K, and the total time to reduce the phosphate phase was decreased by the presence of palladium. Based on the in situ P K-edge XANES experiments and CO chemisorption uptakes, it was proposed that, depending on the amount of palladium incorporated, the final catalysts present different degrees of reduction, thereby impacting catalytic activity. An increase in activity was observed for the palladium-containing samples during time on stream, which might be associated with the formation of a phosphosulfide active species. The extent of the phosphosulfide species formation was dependent on the degree of reduction.Instituto de Investigaciones Fisicoquímicas Teóricas y AplicadasCentro de Investigación y Desarrollo en Ciencias Aplicadas2011-02-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf88-102http://sedici.unlp.edu.ar/handle/10915/84267enginfo:eu-repo/semantics/altIdentifier/issn/0021-9517info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jcat.2011.01.010info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-15T11:08:02Zoai:sedici.unlp.edu.ar:10915/84267Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-15 11:08:02.87SEDICI (UNLP) - Universidad Nacional de La Platafalse |
| dc.title.none.fl_str_mv |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| title |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| spellingShingle |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition Teixeira Da Silva, V. Ciencias Exactas Física Química Nickel phosphide Thiophene hydrodesulfurization X-ray near-edge structure Níquel Rayos X |
| title_short |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| title_full |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| title_fullStr |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| title_full_unstemmed |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| title_sort |
Lowering the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub> by palladium addition |
| dc.creator.none.fl_str_mv |
Teixeira Da Silva, V. Sousa, L. A. Amorim, R. M. Andrini, Leandro Rubén Figueroa, S. J. A. Requejo, Félix Gregorio Vicentini, Flavio C. |
| author |
Teixeira Da Silva, V. |
| author_facet |
Teixeira Da Silva, V. Sousa, L. A. Amorim, R. M. Andrini, Leandro Rubén Figueroa, S. J. A. Requejo, Félix Gregorio Vicentini, Flavio C. |
| author_role |
author |
| author2 |
Sousa, L. A. Amorim, R. M. Andrini, Leandro Rubén Figueroa, S. J. A. Requejo, Félix Gregorio Vicentini, Flavio C. |
| author2_role |
author author author author author author |
| dc.subject.none.fl_str_mv |
Ciencias Exactas Física Química Nickel phosphide Thiophene hydrodesulfurization X-ray near-edge structure Níquel Rayos X |
| topic |
Ciencias Exactas Física Química Nickel phosphide Thiophene hydrodesulfurization X-ray near-edge structure Níquel Rayos X |
| dc.description.none.fl_txt_mv |
The addition of small amounts of palladium (0.1%, 0.5% and 1.0% w/w) to a NixPyOz/SiO<sub>2</sub> sample led to a decrease of ∼200 K in the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub>, allowing synthesis to proceed at 723 K. In situ X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES) experiments demonstrated that the phosphate → phosphide transformation started at approximately 673 K, and the total time to reduce the phosphate phase was decreased by the presence of palladium. Based on the in situ P K-edge XANES experiments and CO chemisorption uptakes, it was proposed that, depending on the amount of palladium incorporated, the final catalysts present different degrees of reduction, thereby impacting catalytic activity. An increase in activity was observed for the palladium-containing samples during time on stream, which might be associated with the formation of a phosphosulfide active species. The extent of the phosphosulfide species formation was dependent on the degree of reduction. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas Centro de Investigación y Desarrollo en Ciencias Aplicadas |
| description |
The addition of small amounts of palladium (0.1%, 0.5% and 1.0% w/w) to a NixPyOz/SiO<sub>2</sub> sample led to a decrease of ∼200 K in the synthesis temperature of Ni<sub>2</sub>P/SiO<sub>2</sub>, allowing synthesis to proceed at 723 K. In situ X-ray diffraction (XRD) and X-ray absorption near-edge structure (XANES) experiments demonstrated that the phosphate → phosphide transformation started at approximately 673 K, and the total time to reduce the phosphate phase was decreased by the presence of palladium. Based on the in situ P K-edge XANES experiments and CO chemisorption uptakes, it was proposed that, depending on the amount of palladium incorporated, the final catalysts present different degrees of reduction, thereby impacting catalytic activity. An increase in activity was observed for the palladium-containing samples during time on stream, which might be associated with the formation of a phosphosulfide active species. The extent of the phosphosulfide species formation was dependent on the degree of reduction. |
| publishDate |
2011 |
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2011-02-12 |
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eng |
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