Ternary PtSnRh–SnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell reaction

Du, Wenxin; Wang, Qi; LaScala, Carlo A.; Zhang, Lihua; Su, Dong; Frenkel, Anatoly I.; Mathur, V.K.; Teng, Xiaowei

doi:10.1039/c0jm04358c

Cited by 62 publications

(51 citation statements)

References 40 publications

(47 reference statements)

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“…However, the ethanol oxidation rate achieved with Pt-Rh catalysts [15] rate is lower than that of Pt-Sn [10]. Ternary PtRh-Sn electrocatalysts combine high oxidation rate with high CO2 selectivity and experimental and theoretical results demonstrate that the good performance of these ternary electrocatalysts is related to thesynergistic effect of Pt, Rh and Sn [16,17,10,[18][19][20]15]. Pt provides the active sites for the first reaction step, that is, the adsorption and dehydrogenation of ethanol.…”

Section: Introductionmentioning

confidence: 98%

Platinum–rhodium–tin/carbon electrocatalysts for ethanol oxidation in acid media: effect of the precursor addition order and the amount of tin

et al. 2015

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Carbon-supported Ptx-Rhy-Snz catalysts (x:y:z = 3:1:4, 6:2:4, 9:3:4) are prepared by Pt, Rh and Sn precursors reduction in different addition order. The materials are characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy techniques and are evaluated for the electrooxidation of ethanol in acidic media by cyclic voltammetry, chronoamperometry and anode potentiostatic polarization.. Oxidized Rh species prevail on the surface of catalysts synthetized by simultaneous co-precipitation, thus demonstrating the influence of synthesis method on the oxidation state of catalysts. Furthermore, high amounts of Sn in composites synthetized by co-precipitation results in very active catalysts at low potentials (bifunctional effect) while medium Sn load is needed for sequentially deposited catalysts when the electronic effect is most important (high potentials), since more exposed Pt and Rh sites are needed on the catalyst surface to alcohol oxidation. The Pt3-Rh1-Sn4/C catalyst prepared by coprecipitation is the most active at potentials lower than 0.55 V (related to bifunctional effect) while the Pt6-Rh2-Sn4/C catalyst, prepared by sequential precipitation (first Rh and, after drying, Pt+Sn), is the most active above 0.55 V.

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Section: Introductionmentioning

confidence: 98%

Platinum–rhodium–tin/carbon electrocatalysts for ethanol oxidation in acid media: effect of the precursor addition order and the amount of tin

et al. 2015

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“…Antolini et al showed that PtSnRu/C with different amounts of Ru had higher EOR activity than PtSn/C, attributing this to interactions involving Sn and Ru oxides [5]. Other metals, such as Ir, In and Rh have also been incorporated into PtSn systems and found to enhance catalytic activity [2,[6][7][8]. It should also be noted that the presence of the metal oxidized state in these systems, especially SnO 2 , also improved the EOR catalytic activity in the above studies.…”

Section: Introductionmentioning

confidence: 99%

Ethanol oxidation activity and structure of carbon-supported Pt-modified PdSn-SnO2 influenced by different stabilizers

Wang

Liu

et al. 2013

Electrochimica Acta

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. Ethanol oxidation activity and structure of carbon-supported Pt- (HMTA). TEM analysis showed that PdSn-SnO2 /C catalyst made using the HMTA stabilizer produced the smallest particle size. XRD analysis detected the presence of PdSn alloy and the SnO2 phase in all three PdSn-SnO2 /C samples, and showed that PdSn-SnO2 (HMTA) had the smallest lattice parameter. After PdSn-SnO2 samples were modified by Pt, the particle size distribution and average size of nanoparticles of Pt-PdSn-SnO2 did not obviously change, and the fcc structure of PdSn in all three samples was retained. XPS measurement showed a higher upshift of Pt 4f binding energy occurred for Pt/PdSn-SnO2 /C (HMTA) compared to those of Pt/PdSn-SnO2 /C (EDTA) and Pt/PdSn-SnO2 /C (Nacitrate). Pt/PdSn-SnO2 /C (HMTA) was also found to have the highest CO and ethanol oxidation activity among the three catalysts. IntroductionThe direct ethanol fuel cell (DEFC) affords an attractive alternative to the direct methanol fuel cell (DMFC) because: (1) ethanol is less toxic than methanol and is easier to store and transport due to its relatively higher boiling point; (2) ethanol can be produced in large quantities by chemical or biological processes; and (3) ethanol has higher energy density than methanol [1]. However, implementation of DEFC technology is hindered by the sluggish rate of the ethanol oxidation reaction (EOR) on the anode [2], and thus requires the development of effective anodic catalysts to increase EOR activity.

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“…Another effective strategy is to prepare composite catalysts by coupling with semiconducting oxides (TiO 2 , SnO 2 and RuO 2 ) as support materials, which have been demonstrated to improve the catalytic activity and stability of Pd catalyst for alcohol electrooxidation [6,16,17]. Among these metal oxides, TiO 2 is touted as an effective substrate because of its high catalytic activity, long-term stability, and nontoxicity [18,19].…”

Section: Introductionmentioning

confidence: 99%

Palladium Nanoparticles Loaded on Carbon Modified TiO2 Nanobelts for Enhanced Methanol Electrooxidation

Liang

Persic³

et al. 2013

Nano-Micro Lett.

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Abstract:Carbon modified TiO2 nanobelts (TiO2-C) were synthesized using a hydrothermal growth method, as a support material for palladium (Pd) nanoparticles (Pd/TiO2-C) to improve the electrocatalytic performance for methanol electrooxidation by comparison to Pd nanoparticles on bare TiO2 nanobelts (Pd/TiO2) and activated carbon (Pd/AC). Cyclic voltammetry characterization was conducted with respect to saturated calomel electrode (SCE) in an alkaline methanol solution, and the results indicate that the specific activity of Pd/TiO2-C is 2.2 times that of Pd/AC and 1.5 times that of Pd/TiO2. Chronoamperometry results revealed that the TiO2-C support was comparable in stability to activated carbon, but possesses an enhanced current density for methanol oxidation at a potential of −0.2 V vs. SCE. The current study demonstrates the potential of Pd nanoparticle loaded on hierarchical TiO2-C nanobelts for electrocatalytic applications such as fuel cells and batteries.

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Ternary PtSnRh–SnO2 nanoclusters: synthesis and electroactivity for ethanol oxidation fuel cell reaction

Cited by 62 publications

References 40 publications

Platinum–rhodium–tin/carbon electrocatalysts for ethanol oxidation in acid media: effect of the precursor addition order and the amount of tin

Platinum–rhodium–tin/carbon electrocatalysts for ethanol oxidation in acid media: effect of the precursor addition order and the amount of tin

Ethanol oxidation activity and structure of carbon-supported Pt-modified PdSn-SnO2 influenced by different stabilizers

Palladium Nanoparticles Loaded on Carbon Modified TiO2 Nanobelts for Enhanced Methanol Electrooxidation

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