IR characterization of adsorbed species over supported transition metals; relevance to catalytic transformations

J. T. Kiss, I. Pálinkó

Research output: Contribution to journalArticle

Abstract

Results of IR investigations are reported on surface reactions over Pd, Rh and Ni catalysts supported on fumed silica (Cab-O-Sil, CS for short). The catalysts were of low dispersion and were studied in (a) double-bond isomerization of methylenecyclohexane (MCH), (b) ring opening of 1,1-dimethylcyclopropane (DMCP), and (c) ring opening of DMCP in the presence of D2. During double-bond isomerization of MCH, H-D exchange (and OH-OD exchange on the support) also took place. When DMCP was introduced into the system, dissociative adsorption occurred (scission of one or more C-H bonds preceded C-C bond rupture). Strongly adsorbed hydrocarbon-like residues were also formed. When a DMCP + D2 mixture was allowed to react on the catalysts, measurements indicated dissociative-type adsorption over Pd/CS (at 298 and 373 K), Ni/CS (at 298 and 473 K) and Rh/CS (at 298 K).

Original languageEnglish
Pages (from-to)99-102
Number of pages4
JournalJournal of Molecular Structure
Volume410-411
DOIs
Publication statusPublished - 1997

Fingerprint

Isomerization
Adsorption
Transition metals
Metals
transition metals
catalysts
isomerization
Catalysts
Surface reactions
Hydrocarbons
Catalyst supports
Silicon Dioxide
Rupture
Ion exchange
adsorption
rings
surface reactions
cleavage
hydrocarbons
silicon dioxide

Keywords

  • 1,1-Dimethylcyclopropane
  • 1,1-Dimethylcyclopropane and D
  • H-D exchange
  • Methylenecyclohexane
  • Silica-supported Pd, Rh and Ni
  • Surface IR spectroscopy

ASJC Scopus subject areas

  • Structural Biology
  • Organic Chemistry
  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Atomic and Molecular Physics, and Optics

Cite this

@article{523ab8580bb3448b898b868ef3bb03ff,
title = "IR characterization of adsorbed species over supported transition metals; relevance to catalytic transformations",
abstract = "Results of IR investigations are reported on surface reactions over Pd, Rh and Ni catalysts supported on fumed silica (Cab-O-Sil, CS for short). The catalysts were of low dispersion and were studied in (a) double-bond isomerization of methylenecyclohexane (MCH), (b) ring opening of 1,1-dimethylcyclopropane (DMCP), and (c) ring opening of DMCP in the presence of D2. During double-bond isomerization of MCH, H-D exchange (and OH-OD exchange on the support) also took place. When DMCP was introduced into the system, dissociative adsorption occurred (scission of one or more C-H bonds preceded C-C bond rupture). Strongly adsorbed hydrocarbon-like residues were also formed. When a DMCP + D2 mixture was allowed to react on the catalysts, measurements indicated dissociative-type adsorption over Pd/CS (at 298 and 373 K), Ni/CS (at 298 and 473 K) and Rh/CS (at 298 K).",
keywords = "1,1-Dimethylcyclopropane, 1,1-Dimethylcyclopropane and D, H-D exchange, Methylenecyclohexane, Silica-supported Pd, Rh and Ni, Surface IR spectroscopy",
author = "Kiss, {J. T.} and I. P{\'a}link{\'o}",
year = "1997",
doi = "10.1016/S0022-2860(96)09636-6",
language = "English",
volume = "410-411",
pages = "99--102",
journal = "Journal of Molecular Structure",
issn = "0022-2860",
publisher = "Elsevier",

}

TY - JOUR

T1 - IR characterization of adsorbed species over supported transition metals; relevance to catalytic transformations

AU - Kiss, J. T.

AU - Pálinkó, I.

PY - 1997

Y1 - 1997

N2 - Results of IR investigations are reported on surface reactions over Pd, Rh and Ni catalysts supported on fumed silica (Cab-O-Sil, CS for short). The catalysts were of low dispersion and were studied in (a) double-bond isomerization of methylenecyclohexane (MCH), (b) ring opening of 1,1-dimethylcyclopropane (DMCP), and (c) ring opening of DMCP in the presence of D2. During double-bond isomerization of MCH, H-D exchange (and OH-OD exchange on the support) also took place. When DMCP was introduced into the system, dissociative adsorption occurred (scission of one or more C-H bonds preceded C-C bond rupture). Strongly adsorbed hydrocarbon-like residues were also formed. When a DMCP + D2 mixture was allowed to react on the catalysts, measurements indicated dissociative-type adsorption over Pd/CS (at 298 and 373 K), Ni/CS (at 298 and 473 K) and Rh/CS (at 298 K).

AB - Results of IR investigations are reported on surface reactions over Pd, Rh and Ni catalysts supported on fumed silica (Cab-O-Sil, CS for short). The catalysts were of low dispersion and were studied in (a) double-bond isomerization of methylenecyclohexane (MCH), (b) ring opening of 1,1-dimethylcyclopropane (DMCP), and (c) ring opening of DMCP in the presence of D2. During double-bond isomerization of MCH, H-D exchange (and OH-OD exchange on the support) also took place. When DMCP was introduced into the system, dissociative adsorption occurred (scission of one or more C-H bonds preceded C-C bond rupture). Strongly adsorbed hydrocarbon-like residues were also formed. When a DMCP + D2 mixture was allowed to react on the catalysts, measurements indicated dissociative-type adsorption over Pd/CS (at 298 and 373 K), Ni/CS (at 298 and 473 K) and Rh/CS (at 298 K).

KW - 1,1-Dimethylcyclopropane

KW - 1,1-Dimethylcyclopropane and D

KW - H-D exchange

KW - Methylenecyclohexane

KW - Silica-supported Pd, Rh and Ni

KW - Surface IR spectroscopy

UR - http://www.scopus.com/inward/record.url?scp=12644304882&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=12644304882&partnerID=8YFLogxK

U2 - 10.1016/S0022-2860(96)09636-6

DO - 10.1016/S0022-2860(96)09636-6

M3 - Article

VL - 410-411

SP - 99

EP - 102

JO - Journal of Molecular Structure

JF - Journal of Molecular Structure

SN - 0022-2860

ER -