Study on the active phase formation of Pd-Zn/Sibunit catalysts during the thermal treatment in hydrogen

Study on the active phase formation of Pd-Zn/Sibunit catalysts during the thermal treatment in hydrogen Full article

Journal

Applied Surface Science
ISSN: 0169-4332

Output data

Year: 2019, Volume: 483, Pages: 730-741 Pages count : 12 DOI: 10.1016/j.apsusc.2019.03.215

Tags

Palladium catalyst; Modification with Zn; Nanoparticles; Structural changes; Temperature-programmed reduction

Authors

Glyzdova Daria V. ¹ , Khramov Evgeny V. ² , Smirnova Nadezhda S. ³ , Prosvirin Igor P. ⁴ , Bukhtiyarov Andrey V. ⁴ , Trenikhin Mikhail V. ¹ , Gulyaeva Tatyana I. ¹ , Vedyagin Aleksey A. ⁴ , Shlyapin Dmitry A. ¹ , Lavrenov Alexander V. ¹

Affiliations

1	Institute of Hydrocarbon Processing SB RAS, Neftezavodskaya St., 54, Omsk 644040, Russian Federation
2	National Research Centre “Kurchatov Institute”, Kurchatov Square, 1, Moscow 123182, Russian Federation
3	Kurnakov Institute of General and Inorganic Chemistry RAS, Leninsky Prospect, 31, Moscow 119991, Russian Federation
4	Boreskov Institute of Catalysis SB RAS, pr. Ac. Lavrentieva, 5, Novosibirsk 630090, Russian Federation

Funding (1)

Ministry of Science and Higher Education of the Russian Federation

46.2.5

In the present research, the process of the formation of the active components of Pd-Zn catalysts supported on carbonaceous material Sibunit prepared by the joint impregnation (Pd:Zn = 1) is studied. It was shown by means of TPR and EXAFS techniques that the interaction between palladium and zinc begins already at T > 200 °C. During the reduction in hydrogen at temperatures of 200–300 °C the surface of particles being formed is enriched with oxidized zinc. In the temperature range of 400–500 °C zinc is completely reduced, and the crystal lattice of a substitutional solid solution based on fcc lattice of palladium is restructured in tetragonal lattice of PdZn. However, an increase of the calcination temperature in H2 atmosphere (500 °C) significantly rises up the probability of partial destruction of bimetallic phase due to the partial migration of zinc atoms from the surface into the bulk of particles.

Glyzdova D.V. , Khramov E.V. , Smirnova N.S. , Prosvirin I.P. , Bukhtiyarov A.V. , Trenikhin M.V. , Gulyaeva T.I. , Vedyagin A.A. , Shlyapin D.A. , Lavrenov A.V.
Study on the active phase formation of Pd-Zn/Sibunit catalysts during the thermal treatment in hydrogen
Applied Surface Science. 2019. V.483. P.730-741. DOI: 10.1016/j.apsusc.2019.03.215 WOS Scopus РИНЦ OpenAlex

Submitted:	Dec 12, 2018
Published print:	Mar 1, 2019
Accepted:	Mar 20, 2019
Published online:	Mar 22, 2019

Web of science:	WOS:000471105000081
Scopus:	2-s2.0-85064012671
Elibrary:	38680042
OpenAlex:	W2935898279

DB	Citing
Scopus	25
Web of science	21
OpenAlex	30