The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst | Sciact - CRIS-system of Boreskov Institute of Catalysis

The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst Full article

Journal

Nanomaterials
, E-ISSN: 2079-4991

Output data

Year: 2018, Volume: 8, Number: 4, Article number : 217, Pages count : 16 DOI: 10.3390/nano8040217

Tags

Carbon monoxide; Copper; Nanocatalyst; Oxidation; Palladium

Authors

Bruk Lev ¹ , Titov Denis ¹ , Ustyugov Alexander ¹ , Zubavichus Yan ² , Chernikova Valeriya ³ , Tkachenko Olga ⁴ , Kustov Leonid ⁴ , Murzin Vadim ⁵ , Oshanina Irina ¹ , Temkin Oleg ¹

Affiliations

1	Moscow Technological University, Institute of Fine Chemical Technology, Department of General Chemical Technology
2	National Research Centre “Kurchatov Institute”
3	Functional Materials Design, Discovery and Development Research Group (FMD3), Advanced Membranes and Porous Materials Center (AMPMC), Division of Physical Sciences and Engineering (PSE), King Abdullah University of Science and Technology (KAUST)
4	N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences
5	Deutsches Elektronen-Synchrotron DESY

The state of palladium and copper on the surface of the PdCl2–CuCl2/γ-Al2O3 nanocatalyst for the low-temperature oxidation of CO by molecular oxygen was studied by various spectroscopic techniques. Using X-ray absorption spectroscopy (XAS), powder X-ray diffraction (XRD), and diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), freshly prepared samples of the catalyst were studied. The same samples were also evaluated after interaction with CO, O2, and H2O vapor in various combinations. It was shown that copper exists in the form of Cu2Cl(OH)3 (paratacamite) nanophase on the surface of the catalyst. No palladium-containing crystalline phases were identified. Palladium coordination initially is comprised of four chlorine atoms. It was shown by XAS that this catalyst is not capable of oxidizing CO at room temperature in the absence of H2O and O2 over 12 h. Copper(II) and palladium(II) are reduced to Cu(I) and Pd(I,0) species, respectively, in the presence of CO and H2O vapor (without O2). It was found by DRIFTS that both linear (2114 cm−1, 1990 cm−1) and bridging (1928 cm−1) forms of coordinated CO were formed upon adsorption onto the catalyst surface. Moreover, the formation of CO2 was detected upon the interaction of the coordinated CO with oxygen. The kinetics of CO oxidation was studied at 18–38 °C at an atmospheric pressure for CO, O2, N2, and H2O (gas) mixtures in a flow reactor (steady state conditions)

Bruk L. , Titov D. , Ustyugov A. , Zubavichus Y. , Chernikova V. , Tkachenko O. , Kustov L. , Murzin V. , Oshanina I. , Temkin O.
The Mechanism of Low-Temperature Oxidation of Carbon Monoxide by Oxygen over the PdCl2–CuCl2/γ-Al2O3 Nanocatalyst

Nanomaterials. 2018. V.8. N4. 217 :1-16. DOI: 10.3390/nano8040217 WOS Scopus РИНЦ ANCAN OpenAlex

Full text from publisher

Submitted:	Feb 19, 2018
Accepted:	Mar 30, 2018
Published print:	Apr 3, 2018
Published online:	Apr 3, 2018

Web of science:	WOS:000434889100038
Scopus:	2-s2.0-85044987240
Elibrary:	35496358
Chemical Abstracts:	2018:1008182
Chemical Abstracts (print):	175:379523
OpenAlex:	W2795858161

DB	Citing
Web of science	10
Scopus	12
OpenAlex	17