Baán Kornélia

Czirok Fanni

Fogarassy Zsolt

Kiss János

Kukovecz Ákos

Kónya Zoltán

Mucsi Róbert

Pitó Ádám

Szamosvölgyi Ákos

Szenti Imre

Sápi András

English

University of Szeged

28th International Symposium on Analytical and Environmental Problems  42  BEHAVIOUR OF PtCo ALLOY NANOPARTICLES IN REVERSE WATER-GAS SHIFT REACTION  Ákos Szamosvölgyi1*, Fanni Czirok1, Ádám Pitó1, Róbert Mucsi1, Kornélia Baán1, András Sápi1,2, Imre Szenti1, János Kiss1,4, Zsolt Fogarassy3, Ákos Kukovecz1, Zoltán Kónya1,4  1University of Szeged, Interdisciplinary Excellence Centre, Department of Applied and Environmental Chemistry, H-6720, Rerrich Béla tér 1, Szeged, Hungary 2Institute of Environmental and Technological Sciences, University of Szeged, H-6720, Szeged, Hungary 3Centre for Energy Research, Institute of Technical Physics and Materials Science, H-1121, Budapest, Hungary 4MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, University of Szeged, H-6720, Szeged, Hungary *e-mail: szamosvolgyi@chem.u-szeged.hu  Abstract The effects of atropogenic CO2 emission are among today‘s most researched topics. One of the most promising approach is to convert the CO2 into other compounds, which could be further converted into reagents for the chemical industry. This approach should let us reach carbon neutrality. The accumulation of CO2 in the atmosphere is due to the stability of the molecule, thus a catalyst is required to activate CO2 and break its bonds. In this project we demonstrate the performance of PtCo alloy nanoparticle systems. PtCo nanoparticles with different Pt:Co ratios (3:1, 1:1, 1:3) were synthesized with similar size and geometry. Pure Pt nanoparticles were also synthesized and were studied as a reference material. The metal content and ratios of the alloy particles were confirmed with IPC-MS. The particles were loaded onto an inert mesoporous silica, MCF-17. The catalyts materials were characterized via TEM, XRD, BET and HAADF (S)TEM. Catalytic activity for reverse water-gas shift reaction was tested in a countinous flow reactor, where the products where separated and detected by a GC. The difference in the catalytic behaviour was further elucidated with in situ DRIFTS and XPS and measurements. In situ DIRFTS allowed us to comprehend the mechanism of the ongoing reaction by identifying the intermediates in the gas phase and adsorbed on the surface of the catalyst. XPS of the nanoparticles also provided valuable information about the composition of the nanoparticles and how the different alloys are structured, as the peak binding energies of the Pt show significants shifts depending on the coordination with Co in the crystal lattice.   

Behaviour of PtCo alloy nanoparticles in reverse water-gas shift reaction : [abstract]

http://acta.bibl.u-szeged.hu/78453/1/proceedings_of_isaep_2022_042.pdf

Behaviour of PtCo alloy nanoparticles in reverse water-gas shift reaction : [abstract]

Abstract

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