Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids

Yingnan Zhao, L. Jia, J.A. Medrano Catalan, J.R.H. Ross, J.R.H. Ross, Leonardus Lefferts

Research output: Contribution to journalArticleAcademicpeer-review

26 Citations (Scopus)
1 Downloads (Pure)

Abstract

Organic capping agents are necessary for metallic nanoparticle preparation via colloidal method; however, complete removal of the capping agent and cleaning the metal surface is a well-known challenge in application. In this Article, we show that polyvinyl alcohol (PVA)-stabilized palladium nanoparticles (Pd NPs) were prepared and immobilized on activated carbon (AC). Different acids (HCl and H2SO4) were used to adjust the pH, thus enhancing the adsorption of the colloid on the support. The catalysts were characterized by TEM, CO-chemisorption, XRF, N2 physisorption, XPS, TGA, and temperature-programmed reduction MS. Activity of the catalyst was tested using nitrite hydrogenation in aqueous phase and formic acid decomposition in gas phase as probe reactions. The results showed that chlorine, introduced via HCl, efficiently suppressed the interaction of the Pd NPs with PVA. Clean Pd NPs were obtained without any significant sintering after reduction in H2/N2 at mild temperature (200 °C). The influence of acid on PVA thermal stability was also investigated. Differences in catalytic activity in gas phase versus liquid aqueous phase indicated that the extent of PVA covering the Pd NPs is phase-dependent
Original languageEnglish
Pages (from-to)2341-2352
JournalACS catalysis
Volume3
Issue number10
DOIs
Publication statusPublished - 2013

Fingerprint

Polyvinyl Alcohol
Catalyst supports
Polyvinyl alcohols
Palladium
Nanoparticles
Acids
formic acid
Gases
Catalysts
Physisorption
Formic acid
Chlorine
Colloids
Carbon Monoxide
Chemisorption
Nitrites
Activated carbon
Hydrogenation
Cleaning
Catalyst activity

Keywords

  • METIS-297570
  • IR-87255

Cite this

Zhao, Y., Jia, L., Medrano Catalan, J. A., Ross, J. R. H., Ross, J. R. H., & Lefferts, L. (2013). Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids. ACS catalysis, 3(10), 2341-2352. https://doi.org/10.1021/cs4004479
Zhao, Yingnan ; Jia, L. ; Medrano Catalan, J.A. ; Ross, J.R.H. ; Ross, J.R.H. ; Lefferts, Leonardus. / Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids. In: ACS catalysis. 2013 ; Vol. 3, No. 10. pp. 2341-2352.
@article{6884d2d3d5d94b968987d1201c938ddb,
title = "Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids",
abstract = "Organic capping agents are necessary for metallic nanoparticle preparation via colloidal method; however, complete removal of the capping agent and cleaning the metal surface is a well-known challenge in application. In this Article, we show that polyvinyl alcohol (PVA)-stabilized palladium nanoparticles (Pd NPs) were prepared and immobilized on activated carbon (AC). Different acids (HCl and H2SO4) were used to adjust the pH, thus enhancing the adsorption of the colloid on the support. The catalysts were characterized by TEM, CO-chemisorption, XRF, N2 physisorption, XPS, TGA, and temperature-programmed reduction MS. Activity of the catalyst was tested using nitrite hydrogenation in aqueous phase and formic acid decomposition in gas phase as probe reactions. The results showed that chlorine, introduced via HCl, efficiently suppressed the interaction of the Pd NPs with PVA. Clean Pd NPs were obtained without any significant sintering after reduction in H2/N2 at mild temperature (200 °C). The influence of acid on PVA thermal stability was also investigated. Differences in catalytic activity in gas phase versus liquid aqueous phase indicated that the extent of PVA covering the Pd NPs is phase-dependent",
keywords = "METIS-297570, IR-87255",
author = "Yingnan Zhao and L. Jia and {Medrano Catalan}, J.A. and J.R.H. Ross and J.R.H. Ross and Leonardus Lefferts",
year = "2013",
doi = "10.1021/cs4004479",
language = "English",
volume = "3",
pages = "2341--2352",
journal = "ACS catalysis",
issn = "2155-5435",
publisher = "American Chemical Society",
number = "10",

}

Zhao, Y, Jia, L, Medrano Catalan, JA, Ross, JRH, Ross, JRH & Lefferts, L 2013, 'Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids' ACS catalysis, vol. 3, no. 10, pp. 2341-2352. https://doi.org/10.1021/cs4004479

Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids. / Zhao, Yingnan; Jia, L.; Medrano Catalan, J.A.; Ross, J.R.H.; Ross, J.R.H.; Lefferts, Leonardus.

In: ACS catalysis, Vol. 3, No. 10, 2013, p. 2341-2352.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Supported Pd Catalysts Prepared via Colloidal Method: The Effect of Acids

AU - Zhao, Yingnan

AU - Jia, L.

AU - Medrano Catalan, J.A.

AU - Ross, J.R.H.

AU - Ross, J.R.H.

AU - Lefferts, Leonardus

PY - 2013

Y1 - 2013

N2 - Organic capping agents are necessary for metallic nanoparticle preparation via colloidal method; however, complete removal of the capping agent and cleaning the metal surface is a well-known challenge in application. In this Article, we show that polyvinyl alcohol (PVA)-stabilized palladium nanoparticles (Pd NPs) were prepared and immobilized on activated carbon (AC). Different acids (HCl and H2SO4) were used to adjust the pH, thus enhancing the adsorption of the colloid on the support. The catalysts were characterized by TEM, CO-chemisorption, XRF, N2 physisorption, XPS, TGA, and temperature-programmed reduction MS. Activity of the catalyst was tested using nitrite hydrogenation in aqueous phase and formic acid decomposition in gas phase as probe reactions. The results showed that chlorine, introduced via HCl, efficiently suppressed the interaction of the Pd NPs with PVA. Clean Pd NPs were obtained without any significant sintering after reduction in H2/N2 at mild temperature (200 °C). The influence of acid on PVA thermal stability was also investigated. Differences in catalytic activity in gas phase versus liquid aqueous phase indicated that the extent of PVA covering the Pd NPs is phase-dependent

AB - Organic capping agents are necessary for metallic nanoparticle preparation via colloidal method; however, complete removal of the capping agent and cleaning the metal surface is a well-known challenge in application. In this Article, we show that polyvinyl alcohol (PVA)-stabilized palladium nanoparticles (Pd NPs) were prepared and immobilized on activated carbon (AC). Different acids (HCl and H2SO4) were used to adjust the pH, thus enhancing the adsorption of the colloid on the support. The catalysts were characterized by TEM, CO-chemisorption, XRF, N2 physisorption, XPS, TGA, and temperature-programmed reduction MS. Activity of the catalyst was tested using nitrite hydrogenation in aqueous phase and formic acid decomposition in gas phase as probe reactions. The results showed that chlorine, introduced via HCl, efficiently suppressed the interaction of the Pd NPs with PVA. Clean Pd NPs were obtained without any significant sintering after reduction in H2/N2 at mild temperature (200 °C). The influence of acid on PVA thermal stability was also investigated. Differences in catalytic activity in gas phase versus liquid aqueous phase indicated that the extent of PVA covering the Pd NPs is phase-dependent

KW - METIS-297570

KW - IR-87255

U2 - 10.1021/cs4004479

DO - 10.1021/cs4004479

M3 - Article

VL - 3

SP - 2341

EP - 2352

JO - ACS catalysis

JF - ACS catalysis

SN - 2155-5435

IS - 10

ER -