Surface science approach to Pt/carbon model catalysts: XPS, STM and microreactor studies
作者： Abdul Md. Motin , Thomas Haunold , Andrey V. Bukhtiyarov , Abhijit Bera , Christoph Rameshan
DOI: 10.1016/J.APSUSC.2018.01.148
关键词:
摘要: Abstract Pt nanoparticles supported on carbon are an important technological catalyst. A corresponding model catalyst was prepared by physical vapor deposition (PVD) of sputtered HOPG (highly oriented pyrolytic graphite). The substrate before and after sputtering as well the Pt/HOPG system annealing were examined XPS STM. This yielded information surface density defects, which serve nucleation centres for Pt, size distribution (mean size/height) nanoparticles. Two different catalysts with mean sizes 2.0 3.6 nm, both turned out to be stable upon UHV-annealing 300 °C. After transfer into a UHV-compatible flow microreactor subsequent cleaning in UHV under mbar pressure, catalytic activity ethylene hydrogenation atmospheric pressure conditions. enabled determine temperature-dependent conversion rates, turnover frequencies (TOFs) activation energies. results obtained line characteristics Pt/C, demonstrating validity current science based approach.
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sci-hub.se 参考文章(60)
Ahmet Bulut, Mehmet Yurderi, İlknur Efecan Ertas, Metin Celebi, Murat Kaya, Mehmet Zahmakiran, Carbon dispersed copper-cobalt alloy nanoparticles: A cost-effective heterogeneous catalyst with exceptional performance in the hydrolytic dehydrogenation of ammonia-borane Applied Catalysis B-environmental. ,vol. 180, pp. 121- 129 ,(2016) , 10.1016/J.APCATB.2015.06.021
Surjyakanta Rana, Suresh Maddila, Kotaiah Yalagala, Sreekantha B. Jonnalagadda, Organo functionalized graphene with Pd nanoparticles and its excellent catalytic activity for Suzuki coupling reaction Applied Catalysis A-general. ,vol. 505, pp. 539- 547 ,(2015) , 10.1016/J.APCATA.2015.07.018
Alpha T. N’Diaye, Sebastian Bleikamp, Peter J. Feibelman, Thomas Michely, Two-dimensional Ir cluster lattice on a graphene Moiré on Ir(111) Physical Review Letters. ,vol. 97, pp. 215501- ,(2006) , 10.1103/PHYSREVLETT.97.215501
Jun Li, Qi-Long Zhu, Qiang Xu, Pd nanoparticles supported on hierarchically porous carbons derived from assembled nanoparticles of a zeolitic imidazolate framework (ZIF-8) for methanol electrooxidation. Chemical Communications. ,vol. 51, pp. 10827- 10830 ,(2015) , 10.1039/C5CC03008K
Justin Baker, Colin Brennan, Alan Hall, David T. Lundie, David Lennon, Liam McMillan, Lauren F. Gilpin, The application of a supported palladium catalyst for the hydrogenation of aromatic nitriles Journal of Molecular Catalysis A-chemical. ,vol. 411, pp. 239- 246 ,(2016) , 10.1016/J.MOLCATA.2015.10.028
O. Demoulin, G. Rupprechter, I. Seunier, B. Le Clef, M. Navez, P. Ruiz, Investigation of parameters influencing the activation of a Pd/gamma-alumina catalyst during methane combustion. Journal of Physical Chemistry B. ,vol. 109, pp. 20454- 20462 ,(2005) , 10.1021/JP051874G
Timm Gerber, Jan Knudsen, Peter J. Feibelman, Elin Grånäs, Patrick Stratmann, Karina Schulte, Jesper N. Andersen, Thomas Michely, CO-Induced Smoluchowski Ripening of Pt Cluster Arrays on the Graphene/Ir(111) Moiré ACS Nano. ,vol. 7, pp. 2020- 2031 ,(2013) , 10.1021/NN400082W
Demid V. Demidov, Igor P. Prosvirin, Alexei M. Sorokin, Valerii I. Bukhtiyarov, Model Ag/HOPG catalysts: preparation and STM/XPS study Catalysis Science & Technology. ,vol. 1, pp. 1432- 1439 ,(2011) , 10.1039/C1CY00127B
Martin Frank, Marcus Bäumer, From atoms to crystallites: adsorption on oxide-supported metal particles Physical Chemistry Chemical Physics. ,vol. 2, pp. 3723- 3737 ,(2000) , 10.1039/B004091F
S. Penner, D. Wang, D.S. Su, G. Rupprechter, R. Podloucky, R. Schlögl, K. Hayek, Platinum nanocrystals supported by silica, alumina and ceria: metal-support interaction due to high-temperature reduction in hydrogen Surface Science. ,vol. 532, pp. 276- 280 ,(2003) , 10.1016/S0039-6028(03)00198-5