Catalytic transfer hydrogenation of 2-butanone on MgO. New active surface sites generated by treatment with chloroform

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

In the course of heterogeneous catalytic transfer hydrogenation (CTH) of carbonyl compounds with alcohols on MgO, the catalyst is continuously poisoned, which leads to a complete loss of activity. The main result of the present work is that deactivation may be prevented by treatment with chloroform and the initial activity of MgO is retained for as long as 65 h. Detailed investigations were carried out (activations of MgO, TG, DSC, chloroform treatment, FT-IR spectroscopy, CDCl3 adsorption) in order to identify both types of active centers responsible for poisoning and CTH. Based on our own experimental results as well as on data in the literature, the prerequisites of CTH on MgO appear to be basic (O2-) site and adjacent surface hydroxyl site pairs. Lewis acid centers responsible for poisoning are blocked and active surface hydroxyl groups of weakly acidic character are simultaneously generated by chloroform treatment.

Original languageEnglish
Pages (from-to)179-185
Number of pages7
JournalCatalysis Letters
Volume59
Issue number2-4
Publication statusPublished - Jun 1999

Fingerprint

Chloroform
Chlorine compounds
chloroform
Hydrogenation
hydrogenation
poisoning
Hydroxyl Radical
Lewis Acids
Carbonyl compounds
carbonyl compounds
deactivation
Infrared spectroscopy
alcohols
Alcohols
Chemical activation
activation
Adsorption
catalysts
acids
Catalysts

Keywords

  • 2-Butanone
  • 2-Propanol
  • Catalytic transfer hydrogenation
  • Chloroform
  • Deactivation
  • FT-IR
  • Magnesium oxide
  • Surface poisoning species

ASJC Scopus subject areas

  • Catalysis
  • Physical and Theoretical Chemistry

Cite this

@article{c82db47c89be460a85cf2a60ca55ade5,
title = "Catalytic transfer hydrogenation of 2-butanone on MgO. New active surface sites generated by treatment with chloroform",
abstract = "In the course of heterogeneous catalytic transfer hydrogenation (CTH) of carbonyl compounds with alcohols on MgO, the catalyst is continuously poisoned, which leads to a complete loss of activity. The main result of the present work is that deactivation may be prevented by treatment with chloroform and the initial activity of MgO is retained for as long as 65 h. Detailed investigations were carried out (activations of MgO, TG, DSC, chloroform treatment, FT-IR spectroscopy, CDCl3 adsorption) in order to identify both types of active centers responsible for poisoning and CTH. Based on our own experimental results as well as on data in the literature, the prerequisites of CTH on MgO appear to be basic (O2-) site and adjacent surface hydroxyl site pairs. Lewis acid centers responsible for poisoning are blocked and active surface hydroxyl groups of weakly acidic character are simultaneously generated by chloroform treatment.",
keywords = "2-Butanone, 2-Propanol, Catalytic transfer hydrogenation, Chloroform, Deactivation, FT-IR, Magnesium oxide, Surface poisoning species",
author = "G. Sz{\"o}llősi and M. Bart{\'o}k",
year = "1999",
month = "6",
language = "English",
volume = "59",
pages = "179--185",
journal = "Catalysis Letters",
issn = "1011-372X",
publisher = "Springer Netherlands",
number = "2-4",

}

TY - JOUR

T1 - Catalytic transfer hydrogenation of 2-butanone on MgO. New active surface sites generated by treatment with chloroform

AU - Szöllősi, G.

AU - Bartók, M.

PY - 1999/6

Y1 - 1999/6

N2 - In the course of heterogeneous catalytic transfer hydrogenation (CTH) of carbonyl compounds with alcohols on MgO, the catalyst is continuously poisoned, which leads to a complete loss of activity. The main result of the present work is that deactivation may be prevented by treatment with chloroform and the initial activity of MgO is retained for as long as 65 h. Detailed investigations were carried out (activations of MgO, TG, DSC, chloroform treatment, FT-IR spectroscopy, CDCl3 adsorption) in order to identify both types of active centers responsible for poisoning and CTH. Based on our own experimental results as well as on data in the literature, the prerequisites of CTH on MgO appear to be basic (O2-) site and adjacent surface hydroxyl site pairs. Lewis acid centers responsible for poisoning are blocked and active surface hydroxyl groups of weakly acidic character are simultaneously generated by chloroform treatment.

AB - In the course of heterogeneous catalytic transfer hydrogenation (CTH) of carbonyl compounds with alcohols on MgO, the catalyst is continuously poisoned, which leads to a complete loss of activity. The main result of the present work is that deactivation may be prevented by treatment with chloroform and the initial activity of MgO is retained for as long as 65 h. Detailed investigations were carried out (activations of MgO, TG, DSC, chloroform treatment, FT-IR spectroscopy, CDCl3 adsorption) in order to identify both types of active centers responsible for poisoning and CTH. Based on our own experimental results as well as on data in the literature, the prerequisites of CTH on MgO appear to be basic (O2-) site and adjacent surface hydroxyl site pairs. Lewis acid centers responsible for poisoning are blocked and active surface hydroxyl groups of weakly acidic character are simultaneously generated by chloroform treatment.

KW - 2-Butanone

KW - 2-Propanol

KW - Catalytic transfer hydrogenation

KW - Chloroform

KW - Deactivation

KW - FT-IR

KW - Magnesium oxide

KW - Surface poisoning species

UR - http://www.scopus.com/inward/record.url?scp=0033153671&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033153671&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0033153671

VL - 59

SP - 179

EP - 185

JO - Catalysis Letters

JF - Catalysis Letters

SN - 1011-372X

IS - 2-4

ER -