Improved Synthesis and Hydrothermal Stability of Pt/C Catalysts Based on Size-Controlled Nanoparticles | Sciact - CRIS-system of Boreskov Institute of Catalysis

Improved Synthesis and Hydrothermal Stability of Pt/C Catalysts Based on Size-Controlled Nanoparticles Full article

Journal

Catalysis Science and Technology
ISSN: 2044-4753 , E-ISSN: 2044-4761

Output data

Year: 2016, Volume: 6, Number: 13, Pages: 5196-5206 Pages count : 11 DOI: 10.1039/C6CY00403B

Tags

Acetic acid; Catalysts; Hydrothermal synthesis; Metal nanoparticles; Metal recovery; Nanoparticles; Organic acids; pH; Platinum; Platinum alloys

Authors

Lemus J. ¹ , Bedia J. ¹ , Calvo L. ¹ , Simakova I.L. ² , Murzin D.Yu. ³ , Etzold B.J.M. ⁴ , Rodrigues J.J. ¹ , Gilarranz M.A. ¹

Affiliations

1	Sección de Ingeniería Química, Facultad de Ciencias, Universidad Autónoma de Madrid, 28049 Madrid, Spain
2	Boreskov Institute of Catalysis, pr. Lavrentieva, 5, 630090, Novosibirsk, Russia
3	Åbo Akademi University, Turku/Åbo, 20500, Finland
4	Ernst-Berl-Institut für Technische und Makromolekulare Chemie, Technische Universität Darmstadt, 64287 Darmstadt, Germany

Funding (1)

European Commission

310490 FP7-NMP-2012-SMALL-6 SUSFUELCAT

A novel method for the preparation of stable Pt/C catalysts with size-controlled nanoparticles has been developed. The method is based on in situ synthesis of the nanoparticles (reduction with NaBH4 in the presence of a support and PVP). Compared to the conventional ex situ route (colloidal synthesis followed by impregnation), this in situ route yields smaller nanoparticles (2.5–3.9 nm) of narrower size distribution. The catalysts prepared by the in situ synthesis showed a higher stability in water at 80 °C, indicating a stronger interaction between the support and the metallic phase. Hydrothermal stability tests were also conducted under conditions equivalent to those of aqueous phase reforming (200 °C, 17 bar and water and diluted acetic acid). Hydrothermal treatment proved to be an excellent method to improve the resistance to leaching of the catalysts. Metal loss was negligible while PVP was almost completely removed from the catalyst; hence, most of the porosity was recovered and the dispersion measured by CO chemisorption increased from 5 to 34–75%. Water at 200 °C was more effective than diluted acetic acid for the removal of PVP. TEM images confirmed that the Pt nanoparticles did not undergo significant changes either in size or morphology upon the hydrothermal treatment, and XPS analysis showed a homogeneous distribution of Pt nanoparticles within the catalyst granules.

Lemus J. , Bedia J. , Calvo L. , Simakova I.L. , Murzin D.Y. , Etzold B.J.M. , Rodrigues J.J. , Gilarranz M.A.
Improved Synthesis and Hydrothermal Stability of Pt/C Catalysts Based on Size-Controlled Nanoparticles
Catalysis Science and Technology. 2016. V.6. N13. P.5196-5206. DOI: 10.1039/C6CY00403B WOS Scopus РИНЦ ANCAN OpenAlex

Submitted:	Feb 23, 2016
Accepted:	Mar 10, 2016
Published online:	Mar 11, 2016

Web of science:	WOS:000378734700059
Scopus:	2-s2.0-84976629393
Elibrary:	26837266
Chemical Abstracts:	2016:404489
Chemical Abstracts (print):	165:87627
OpenAlex:	W2300264408

DB	Citing
Web of science	31
Scopus	33
Elibrary	32
OpenAlex	30