Nature of Active Palladium Sites on Nitrogen Doped Carbon Nanofibers in Selective Hydrogenation of Acetylene | Sciact - CRIS-system of Boreskov Institute of Catalysis

Nature of Active Palladium Sites on Nitrogen Doped Carbon Nanofibers in Selective Hydrogenation of Acetylene Full article

Journal

Diamond and Related Materials
ISSN: 0925-9635 , E-ISSN: 1879-0062

Output data

Year: 2018, Volume: 89, Pages: 67-73 Pages count : 7 DOI: 10.1016/j.diamond.2018.08.007

Tags

Ni-Cu CATALYST; Pd/C CATALYSTS; FORMIC-ACID; ETHYLENE/AMMONIA MIXTURE; ELECTRICAL-CONDUCTIVITY; FUSED DIPORPHYRINS; STRUCTURAL-CHANGES; METAL-CLUSTERS; IN-SITU; DECOMPOSITION

Authors

Chesnokov V.V. ¹ , Kriventsov V.V. ¹ , Malykhin S.E. ² , Svintsitskiy D.A. ^1,2 , Podyacheva O.Yu. ^1,2 , Lisitsyn A.S. ¹ , Richards Ryan M. ³

Affiliations

1	Boreskov Institute of Catalysis, Pr. Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Ul. Pirogova 2, Novosibirsk 630090, Russia
3	Department of Chemistry, Colorado School of Mines, 1500 Illinois, Golden, CO 80401, USA

Funding (4)

1	Russian Science Foundation	17-73-30032
2	National Science Foundation	1214068
3	Russian Foundation for Basic Research	16-03-01139
4	Russian Foundation for Basic Research	18-03-01251

The nature of the active sites for palladium supported on nitrogen doped carbon nanofibers (Pd/N-CNFs) catalysts for selective hydrogenation of acetylene to ethylene was examined. Palladium concentrations of 0.05–0.6 wt% were deposited on carbon nanofibers doped by nitrogen atoms (N-CNFs) and characterized by transmission electron microscopy (TEM), CO chemisorption, X-ray photoelectron spectroscopy (XPS), Extended X-ray Absorption Fine Structure (EXAFS) and quantum-chemical calculations. The data indicates that the Pd initially forms highly-dispersed particles. However, decreasing of the Pd concentration on the carbon nanofibers doped by nitrogen atoms below 0.15 wt% led to stabilization of the metal in the atomic state. Porphyrin-like defects with four nitrogen atoms are formed on the surface of the CNFs and strongly interact with palladium atoms, and thus can be sites for stabilization of atomic Pd. The catalytic activity and selectivity of Pd/N-CNFs catalysts depend on the ratio of these two palladium states.

Chesnokov V.V. , Kriventsov V.V. , Malykhin S.E. , Svintsitskiy D.A. , Podyacheva O.Y. , Lisitsyn A.S. , Richards R.M.
Nature of Active Palladium Sites on Nitrogen Doped Carbon Nanofibers in Selective Hydrogenation of Acetylene
Diamond and Related Materials. 2018. V.89. P.67-73. DOI: 10.1016/j.diamond.2018.08.007 WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	May 18, 2018
Accepted:	Aug 14, 2018
Published online:	Aug 14, 2018
Published print:	Oct 1, 2018

Web of science:	WOS:000449240000008
Scopus:	2-s2.0-85051671764
Elibrary:	35729889
Chemical Abstracts:	2018:1550450
Chemical Abstracts (print):	169:383339
OpenAlex:	W2886636240

DB	Citing
Scopus	24
Elibrary	23
Web of science	22
OpenAlex	23