Preparation and hydrogen sorption of Pd nanoparticles on Al2O3 pillared clays

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

Pd nanoparticles were prepared in the solid-liquid adsorption layer on pillared clays and the subcolloids with a diameter of 3-5 nm obtained were characterized by various methods. Based on the liquid sorption isotherms determined in ethanol-toluene mixtures, the composition of the interfacial layer as a "nanophase reactor" may be determined; equilibrium conditions for the formation of Pd nanocrystals were selected. The surfacial binding of Pd0 particles may be monitored by spectrophotometry throughout the preparation. N2 adsorption measurements indicate a gradual decrease in micropores and external surface areas with increasing Pd content of the samples. According to TEM pictures, samples with higher Pd contents contain particles with larger diameters. These results are supported by SAXS and H2 adsorption measurements as well. The relationship between catalytic activity and size of Pd subcolloids is revealed by microcalorimetric monitoring of hydrogen adsorption and by the results of catalytic hydrogenation reactions. These measurements indicate that smaller particles have larger catalytic activities.

Original languageEnglish
Pages (from-to)109-118
Number of pages10
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume139
Issue number1
Publication statusPublished - Sep 1 1998

Fingerprint

sorption
clays
Sorption
Hydrogen
Clay
Nanoparticles
Adsorption
nanoparticles
preparation
adsorption
hydrogen
catalytic activity
Catalyst activity
Spectrophotometry
Toluene
Liquids
spectrophotometry
liquids
Nanocrystals
Hydrogenation

Keywords

  • Gas microcalorimetry
  • Hydrogen adsorption
  • Pd nanoparticles
  • Pillared clays
  • SAXS

ASJC Scopus subject areas

  • Colloid and Surface Chemistry
  • Physical and Theoretical Chemistry

Cite this

@article{bc0165915ca9484eb526ae5875fd9968,
title = "Preparation and hydrogen sorption of Pd nanoparticles on Al2O3 pillared clays",
abstract = "Pd nanoparticles were prepared in the solid-liquid adsorption layer on pillared clays and the subcolloids with a diameter of 3-5 nm obtained were characterized by various methods. Based on the liquid sorption isotherms determined in ethanol-toluene mixtures, the composition of the interfacial layer as a {"}nanophase reactor{"} may be determined; equilibrium conditions for the formation of Pd nanocrystals were selected. The surfacial binding of Pd0 particles may be monitored by spectrophotometry throughout the preparation. N2 adsorption measurements indicate a gradual decrease in micropores and external surface areas with increasing Pd content of the samples. According to TEM pictures, samples with higher Pd contents contain particles with larger diameters. These results are supported by SAXS and H2 adsorption measurements as well. The relationship between catalytic activity and size of Pd subcolloids is revealed by microcalorimetric monitoring of hydrogen adsorption and by the results of catalytic hydrogenation reactions. These measurements indicate that smaller particles have larger catalytic activities.",
keywords = "Gas microcalorimetry, Hydrogen adsorption, Pd nanoparticles, Pillared clays, SAXS",
author = "Anna Sz{\"u}cs and Z. Kir{\'a}ly and F. Berger and I. D{\'e}k{\'a}ny",
year = "1998",
month = "9",
day = "1",
language = "English",
volume = "139",
pages = "109--118",
journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",
issn = "0927-7757",
publisher = "Elsevier",
number = "1",

}

TY - JOUR

T1 - Preparation and hydrogen sorption of Pd nanoparticles on Al2O3 pillared clays

AU - Szücs, Anna

AU - Király, Z.

AU - Berger, F.

AU - Dékány, I.

PY - 1998/9/1

Y1 - 1998/9/1

N2 - Pd nanoparticles were prepared in the solid-liquid adsorption layer on pillared clays and the subcolloids with a diameter of 3-5 nm obtained were characterized by various methods. Based on the liquid sorption isotherms determined in ethanol-toluene mixtures, the composition of the interfacial layer as a "nanophase reactor" may be determined; equilibrium conditions for the formation of Pd nanocrystals were selected. The surfacial binding of Pd0 particles may be monitored by spectrophotometry throughout the preparation. N2 adsorption measurements indicate a gradual decrease in micropores and external surface areas with increasing Pd content of the samples. According to TEM pictures, samples with higher Pd contents contain particles with larger diameters. These results are supported by SAXS and H2 adsorption measurements as well. The relationship between catalytic activity and size of Pd subcolloids is revealed by microcalorimetric monitoring of hydrogen adsorption and by the results of catalytic hydrogenation reactions. These measurements indicate that smaller particles have larger catalytic activities.

AB - Pd nanoparticles were prepared in the solid-liquid adsorption layer on pillared clays and the subcolloids with a diameter of 3-5 nm obtained were characterized by various methods. Based on the liquid sorption isotherms determined in ethanol-toluene mixtures, the composition of the interfacial layer as a "nanophase reactor" may be determined; equilibrium conditions for the formation of Pd nanocrystals were selected. The surfacial binding of Pd0 particles may be monitored by spectrophotometry throughout the preparation. N2 adsorption measurements indicate a gradual decrease in micropores and external surface areas with increasing Pd content of the samples. According to TEM pictures, samples with higher Pd contents contain particles with larger diameters. These results are supported by SAXS and H2 adsorption measurements as well. The relationship between catalytic activity and size of Pd subcolloids is revealed by microcalorimetric monitoring of hydrogen adsorption and by the results of catalytic hydrogenation reactions. These measurements indicate that smaller particles have larger catalytic activities.

KW - Gas microcalorimetry

KW - Hydrogen adsorption

KW - Pd nanoparticles

KW - Pillared clays

KW - SAXS

UR - http://www.scopus.com/inward/record.url?scp=0032122962&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0032122962&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0032122962

VL - 139

SP - 109

EP - 118

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

SN - 0927-7757

IS - 1

ER -