Preparation of Platinum-on-Carbon Catalysts via Hydrolytic Deposition: Factors Influencing the Deposition and Catalytic Properties Full article
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Applied Catalysis A: General
ISSN: 0926-860X , E-ISSN: 1873-3875 |
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| Output data | Year: 2012, Volume: 449, Pages: 203-214 Pages count : 12 DOI: 10.1016/j.apcata.2012.10.004 | ||||
| Tags | Carbon supports, Catalyst preparation, Hydrolytic deposition, Pore-size effect, Pt catalysts | ||||
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Abstract:
The deposition of Pt oxide from aqueous chloroplatinate solutions onto carbon supports (activated car-bons, carbon blacks, carbon nanofibers) with the aid of Na2CO3and without adding the reductants or wetting agents was studied. It has been revealed that carbons accelerate greatly the hydrolysis of chloro-platinate, and the hydrolytic deposition can therefore interfere with the other preparation methods. Neutral pH was found optimum for heterogeneous nucleation and formation of smaller PtOx particles. High temperature (80◦C) allowed depositions of 5–30 wt.% of Pt for a short time (1–3 h) but did not affect Pt dispersions (15–90% at surface concentration of Pt 0.5–30 mol/m2). The supported particles could be further reduced in the liquid phase with minimal losses of the dispersion (Na-formate as reduc-tant). The heterogeneous nucleation ensured a uniform distribution of Pt particles but provoked particle confinement in narrow pores. The possibility of influencing catalytic properties with the aid of the sup-port, Pt loading and deposition conditions was demonstrated (hydrogenation of cycloalkenes as a model structure-insensitive reaction and oxidation of isopropyl alcohol as structure-sensitive one).
Cite:
Kaprielova K.M.
, Yakovina O.A.
, Ovchinnikov I.I.
, Koscheev S.V.
, Lisitsyn A.S.
Preparation of Platinum-on-Carbon Catalysts via Hydrolytic Deposition: Factors Influencing the Deposition and Catalytic Properties
Applied Catalysis A: General. 2012. V.449. P.203-214. DOI: 10.1016/j.apcata.2012.10.004 WOS Scopus РИНЦ ANCAN OpenAlex
Preparation of Platinum-on-Carbon Catalysts via Hydrolytic Deposition: Factors Influencing the Deposition and Catalytic Properties
Applied Catalysis A: General. 2012. V.449. P.203-214. DOI: 10.1016/j.apcata.2012.10.004 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
| Submitted: | Jul 18, 2012 |
| Accepted: | Oct 11, 2012 |
| Published online: | Oct 23, 2012 |
| Published print: | Dec 1, 2012 |
Identifiers:
| Web of science: | WOS:000313224500024 |
| Scopus: | 2-s2.0-84870446600 |
| Elibrary: | 20495018 |
| Chemical Abstracts: | 2012:1652913 |
| Chemical Abstracts (print): | 158:107660 |
| OpenAlex: | W1983460203 |