SciAct
Toggle navigation
  • EN
  • RU

Sections:

  • Articles
  • Books
  • Conference attendances
  • Conference theses
  • Patents

Highly Efficient Catalysts Based on Divanadium-Substituted Polyoxometalate and N-Doped Carbon Nanotubes for Selective Oxidation of Alkylphenols Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal ACS Catalysis
ISSN: 2155-5435
Output data Year: 2018, Volume: 8, Pages: 1297-1307 Pages count : 11 DOI: 10.1021/acscatal.7b03933
Tags alkylphenols, benzoquinones, carbon nanotubes, heterogeneous catalysis, hydrogen peroxide, nitrogen-doped, polyoxometalate, selective oxidation
Authors Evtushok Vasiliy Yu. 1,2 , Suboch Arina N. 1,2 , Podyacheva Olga Yu. 1,2 , Stonkus Olga A. 1,2 , Zaikovskii Vladimir I. 1,2 , Chesalov Yurii A. 1,2 , Kibis Lidiya S. 1,2 , Kholdeeva Oxana A. 1,2
Affiliations
1 Boreskov Institute of Catalysis, Lavrentieva ave. 5, Novosibirsk 630090, Russia
2 Novosibirsk State University, Pirogova str. 2, Novosibirsk 630090, Russia

Funding (1)

1 Federal Agency for Scientific Organizations 0303-2016-0005

Abstract: Alkyl-substituted benzoquinones serve as versatile building blocks for a variety of biologically active compounds. In this work, we present an approach for the environmentally benign synthesis of alkyl-p-benzoquinones, in particular trimethyl-p-benzoquinone (TMBQ, vitamin E precursor), which employs aqueous hydrogen peroxide as oxidant and a divanadium-substituted γ-Keggin polyoxotungstate, [γ-PW10O38V2(μ-O)(μ–OH)]4– (V2-POM), immobilized on nitrogen-doped carbon nanotubes (N-CNTs) as heterogeneous catalyst. A series of supported catalysts V2-POM/N-CNTs containing 5–25 wt % of V2-POM and 0–4.8 atom % of N has been prepared and characterized by elemental analysis, N2 adsorption, SEM, TEM, XPS, and FTIR techniques. The catalytic performance of V2-POM/N-CNTs was assessed in the selective oxidation of 2,3,6-trimethylphenol (TMP) with H2O2 under mild reaction conditions (60 °C, MeCN). The presence of nitrogen in the support ensures strong adsorption and molecular dispersion of V2-POM on the carbon surface, leading to highly active and selective heterogeneous catalysts, which do not suffer from metal leaching and can be used repeatedly without loss of the catalytic performance. By application of the optimal catalyst V2-POM/N-CNTs enclosing 15 wt % of V2-POM and 1.8 atom % of N, TMBQ could be obtained with 99% yield and 80% oxidant utilization efficiency. The catalyst demonstrated the truly heterogeneous nature of the catalysis and high turnover frequencies (500 h–1) and space–time yield (450 g L–1 h–1). FTIR and XPS techniques confirmed the stability of V2-POM and N-CNT support under the turnover conditions.
Cite: Evtushok V.Y. , Suboch A.N. , Podyacheva O.Y. , Stonkus O.A. , Zaikovskii V.I. , Chesalov Y.A. , Kibis L.S. , Kholdeeva O.A.
Highly Efficient Catalysts Based on Divanadium-Substituted Polyoxometalate and N-Doped Carbon Nanotubes for Selective Oxidation of Alkylphenols
ACS Catalysis. 2018. V.8. P.1297-1307. DOI: 10.1021/acscatal.7b03933 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Submitted: Nov 17, 2017
Published online: Jan 19, 2018
Published print: Feb 2, 2018
Identifiers:
publication_identifier.wos_identifier_type WOS:000424735000070
publication_identifier.scopus_identifier_type 2-s2.0-85041417110
publication_identifier.rinz_identifier_type 35484691
publication_identifier.accession_number_identifier_type 2018:18142
publication_identifier.chemical_accession_number_identifier_type 168:158111
Altmetrics: