Preferential CO oxidation over bimetallic Pt–Co catalysts prepared via double complex salt decomposition

Потемкин, Д.И.; Filatov, E. Yu.; Задесенец, А. В.; Snytnikov, P.V.; Shubin, Yu. V.; Sobyanin, V. A.

doi:10.1016/j.cej.2012.07.037

Cited by 48 publications

(23 citation statements)

References 36 publications

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“…Hydrogen as the fuel of PEMFC is traditionally produced by steam reforming, but the resulted gases always contain a small quantity of CO (0.5–2%), which poisons platinum on anode of PEMFCs. Among the popular methods for CO removal from H 2 steam, preferential CO oxidation (PROX) appears to be the most promising one1234. For an ideal PROX catalyst, it should meet primarily the following key requirements: (1) high CO oxidation conversion, (2) low H 2 oxidation activity, (3) resistance to deactivation caused by CO 2 and H 2 O.…”

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confidence: 99%

Nanoporous gold as an active low temperature catalyst toward CO oxidation in hydrogen-rich stream

Zhu

Wang

et al. 2013

Sci Rep

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Preferential CO oxidation (PROX) was investigated by using dealloyed nanoporous gold (NPG) catalyst under ambient conditions. Systematic investigations were carried out to characterize its catalytic performance by varying reaction parameters such as temperature and co-existence of CO2 and H2O, which revealed that NPG was a highly active and selective catalyst for PROX, especially at low temperature. At 20°C, the exit CO concentration could be reduced to less than 2 ppm with a turnover frequency of 4.1 × 10−2 s−1 at a space velocity of 120,000 mL h−1 g−1cat. and its high activity could retain for more than 24 hours. The presence of residual Ag species in the structure did not seem to improve the intrinsic activity of NPG for PROX; however, they contributed to the stabilization of the NPG structure and apparent catalytic activity. These results indicated that NPG might be readily applicable for hydrogen purification in fuel cell applications.

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confidence: 99%

Nanoporous gold as an active low temperature catalyst toward CO oxidation in hydrogen-rich stream

Zhu

Wang

et al. 2013

Sci Rep

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“…When comparing the results obtained for the microreactors prepared in this work with other results found in the literature, Pt has long been reported as a more appropriate active phase for this reaction compared to other noble metal catalysts and is the most widely noble metal used in the latest works on catalysts for PrOx CO [33], [34], [35]. Pd has never been included in the catalyst compositions tested in microreactors, probably due to the poor performance in this application of traditionally synthesized Pd-based powder catalysts [36], [37].…”

Section: Mr-pdmentioning

confidence: 75%

Capillary microreactors based on hierarchical SiO2 monoliths incorporating noble metal nanoparticles for the Preferential Oxidation of CO

Miguel-García

Navlani‐García

García-Aguilar

et al. 2015

Chemical Engineering Journal

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Novel hierarchical SiO 2 monolithic microreactors loaded with either Pd or Pt nanoparticles have been prepared in fused silica capillaries and tested in the PreferentialOxidation of CO (PrOx) reaction. Pd and Pt nanoparticles were prepared by the reduction by solvent method and the support used was a mesoporous SiO 2 monolith prepared by a well-established sol-gel methodology. Comparison of the activity with an equivalent powder catalyst indicated that the microreactors show an enhanced catalytic behaviour (both in terms of CO conversion and selectivity) due to the superior mass and heat transfer processes that take place inside the microchannel. TOF values at low CO conversions have been found to be ~2.5 times higher in the microreactors than in the powder catalyst and the residence time seems to have a noticeable influence over the selectivity of the catalysts designed for this reaction. The Pd and Pt flexible microreactors developed in this work have proven to be effective for the CO oxidation reaction both in the presence and absence of H 2 , standing out as a very interesting and 1 Corresponding author. Fax: +34 965 903454 E-mail address: a.berenguer@ua.es (Á. Berenguer) suitable option for the development of CO purification systems of small dimensions for portable and on-board applications.

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“…Cobalt containing catalysts have received great scientific interest among transition metal oxides, due to their high activity in low temperature CO oxidation (Cao et al, 2012;Iglesias et al, 2005;Jansson, 2000;Lou et al, 2011;Mokhtar et al, 2010;Potemkin et al, 2012;Sun et al, 2011;Teng et al, 2009). Co 3 O 4 as support (Lou et al, 2011), as active phase (Biabani-Ravandi and Rezaei, 2012) or as promoter (Mokhtar et al, 2010) has been used.…”

Section: Introductionmentioning

confidence: 97%

“…Different preparation methods such as precipitation and co-precipitation (BiabaniRavandi et al, 2013b,c), impregnation (Jansson, 2000), hydrotalcite route (Mokhtar et al, 2010), double complex salt decomposition (Potemkin et al, 2012), thermal decomposition (Iglesias et al, 2005), micelle-assisted hydrothermal synthesis (Teng et 3 al., 2009), sol-gel (Sun et al, 2011) and microwave-assisted hydrothermal method (Cao et al, 2012) have been investigated, but among them the precipitation method is the most common and the simplest.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization and Application of Co–MgO Mixed Oxides in Oxidation of Carbon Monoxide

Fattah

Rezaei

Biabani-Ravandi

et al. 2014

Chemical Engineering Communications

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The present work deals with the synthesis of nanostructured Co-MgO mixed oxides with different weight ratios of Cobalt by a facile co-precipitation method as a catalyst for low temperature CO oxidation. The prepared samples were characterized by X-ray diffraction (XRD), N 2 adsorption/desorption (BET), Fourier transform infrared spectroscopy (FTIR) and Transmission and scanning electron microscopies (TEM and SEM) techniques. The results revealed that inexpensive cobalt-magnesium mixed metal oxide nanoparticles have a high potential as catalyst in low temperature CO oxidation. The Co-MgO mixed oxide with 30 wt.% cobalt had the highest activity. The results showed that the catalysts pretreated under O 2 containing atmosphere possessed higher activity compared to the catalyst pretreated under H 2 atmosphere. Co-MgO catalyst showed a good repeatability in reaction condition. The stability test exhibited that the Co-MgO mixed oxides were highly stable for CO oxidation over a 30 h time on stream in the feed gas containing high amount of moisture and CO 2 . Downloaded by [Gebze Yuksek Teknoloji Enstitïsu ] at 07:15 23 December 2014 2

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Preferential CO oxidation over bimetallic Pt–Co catalysts prepared via double complex salt decomposition

Cited by 48 publications

References 36 publications

Nanoporous gold as an active low temperature catalyst toward CO oxidation in hydrogen-rich stream

Nanoporous gold as an active low temperature catalyst toward CO oxidation in hydrogen-rich stream

Capillary microreactors based on hierarchical SiO2 monoliths incorporating noble metal nanoparticles for the Preferential Oxidation of CO

Synthesis, Characterization and Application of Co–MgO Mixed Oxides in Oxidation of Carbon Monoxide

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