Platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane Complex as a Pt Source for Pt/SnO2Catalyst

This paper presents new preparation method of Pt/SnO2, an important catalytic system. Besides of its application as a heterogenic industrial catalyst, it is also used as a catalyst in electrochemical processes, especially in fuel cells. Platinum is commonly used as an anode catalyst in low temperature fuel cells, fuelled with alcohols of low molecular weight such as methanol. Platinum(0)-1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex was used as a precursor of metallic phase. The aim of the research was to obtain a highly active in electrochemical system Pt/SnO2catalyst with low metal load. Considering small size of Pt crystallites, it should result in high activity of Pt/SnO2system. The presented method of SnO2synthesis allows for obtaining support consisting of nanoparticles. The effect of the thermal treatment on activity of Pt/SnO2gel was demonstrated. The system properties were investigated using TEM, FTIR (ATR), and XRD techniques to describe its thermal structural evolution. The results showed two electrocatalytical activity peaks for drying at a temperature of 430 K and above 650 K.

Download Full-text

Surface Composition of a Highly Active Pt 3 Y Alloy Catalyst for Application in Low Temperature Fuel Cells

Fuel Cells ◽

10.1002/fuce.201900186 ◽

2020 ◽

Vol 20 (4) ◽

pp. 413-419

Author(s):

R. Brown ◽

M. Vorokhta ◽

T. Skála ◽

I. Khalakhan ◽

N. Lindahl ◽

...

Keyword(s):

Fuel Cells ◽

Low Temperature ◽

Surface Composition ◽

Highly Active ◽

Low Temperature Fuel Cells ◽

Alloy Catalyst

Download Full-text

Steam Reforming of Methanol over Nanostructured Pt/TiO2 and Pt/CeO2 Catalysts for Fuel Cell Applications

Catalysts ◽

10.3390/catal8110544 ◽

2018 ◽

Vol 8 (11) ◽

pp. 544 ◽

Cited By ~ 9

Author(s):

Joan Papavasiliou ◽

Alexandra Paxinou ◽

Grzegorz Słowik ◽

Stylianos Neophytides ◽

George Avgouropoulos

Keyword(s):

Fuel Cells ◽

Steam Reforming ◽

Polymer Electrolyte Membrane ◽

Nanostructured Catalysts ◽

Metallic Phase ◽

Steam Reforming Of Methanol ◽

Electrolyte Membrane ◽

Internal Reforming ◽

Highly Active ◽

Scanning Transmission

A research and technological challenge for fuel processors integrated with High Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFCs), also known as Internal Reforming Methanol Fuel Cells (IRMFCs), operating at 200–220 °C, is the development of highly efficient catalysts, which will be able to selectively (low CO and other by-products formation) produce the required quantity of hydrogen at these temperatures. In this work, various amounts of platinum were dispersed via deposition-precipitation (DP) and impregnation (I) methods onto the surface of hydrothermally prepared ceria nanorods (CNRs) and titania nanotubes (TNTs). These nanostructured catalysts were evaluated in steam reforming of methanol process targeting the operation level of IRMFCs. The (DP) method resulted in highly (atomically) dispersed platinum-based catalysts, as confirmed with Scanning Transmission Electron Microscopy (STEM) analysis, with a mean particle size of less than 1 nm in the case of 0.35 wt.% Pt/CNRs catalyst. Ultra-fine dispersion of platinum species correlated with the presence of oxygen vacancies, together with the enrichment of CNRs surface with active metallic phase resulted in a highly active catalyst achieving at 220 °C a hydrogen production rate of 5500 cm3 min−1 per g of loaded platinum.

Download Full-text