Physical and electrochemical properties of Pt–Ru/C samples prepared on various carbon supports by using the barrel sputtering system

Inoue, Mitsuhiro; Akamaru, Satoshi; Taguchi, Akira; Abe, Takayuki

doi:10.1016/j.vacuum.2008.04.042

Cited by 20 publications

(17 citation statements)

References 17 publications

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“…Therefore, TK, which is prepared by a wet process, is expected to contain Ru or Ru-rich alloy particles mentioned above. In contrast, the Pt-Ru/C sample prepared by the polygonal barrel-sputtering method does not contain Ru or Ru-rich alloy particles at all [14,18]. These results suggest that the presence of Ru or Ru-rich alloy particles influences the suppression of potential oscillations.…”

Section: Resultsmentioning

confidence: 84%

“…50:50 at.% by a dry process termed 'polygonal barrel-sputtering method' [14,18]. In this method, no Pt and Ru precursors are required to prepare the Pt-Ru/ C; the individual Pt-Ru nanoparticles deposited by this method have the uniform Pt/Ru ratio of ca.…”

Section: Ent Decomposition Temperatures Of Pt and Ru Precursorsmentioning

confidence: 99%

“…In this method, no Pt and Ru precursors are required to prepare the Pt-Ru/ C; the individual Pt-Ru nanoparticles deposited by this method have the uniform Pt/Ru ratio of ca. 50:50 at.% [14,18]. Owing to the above characteristic, the samples prepared by the polygonal barrel-sputtering method have higher CO oxidation activities than commercially available samples and Pt-Ru/C samples prepared by wet process such as the impregnation method [14,18].…”

Section: Ent Decomposition Temperatures Of Pt and Ru Precursorsmentioning

confidence: 99%

“…50:50 at.% [14,18]. Owing to the above characteristic, the samples prepared by the polygonal barrel-sputtering method have higher CO oxidation activities than commercially available samples and Pt-Ru/C samples prepared by wet process such as the impregnation method [14,18]. Thus, it is expected that potential oscillations can be suppressed using Pt-Ru/C sample prepared by the polygonal barrel-sputtering method.…”

Section: Ent Decomposition Temperatures Of Pt and Ru Precursorsmentioning

confidence: 99%

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Suppression of Potential Oscillations in PEFCs by Using Anode Catalyst Prepared by Polygonal Barrel‐Sputtering Method

et al. 2010

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In this study, we investigated the suppression of potential oscillations that occur while feeding H2 gas including a large amount of CO to polymer electrolyte fuel cells. A carbon‐supported Pt–Ru alloy (Pt–Ru/C) sample was prepared by the polygonal barrel‐sputtering method. Electrochemical measurement was conducted in 1 N H2SO4 electrolyte solution saturated with H2 gas including CO of 1,000 ppm. From the measurement, it was found that the prepared Pt–Ru/C sample showed higher CO tolerance than a commercially available sample, and therefore, potential oscillations in the case of the prepared sample occurred for slightly longer intervals. Additional samples were prepared by sputtering different amounts of Ru on the prepared Pt–Ru/C sample, and it was observed that the average interval of potential oscillations increased with the amount of Ru. This result suggests that in the case of the polygonal barrel‐sputtering method, Ru plays an important role in suppressing potential oscillations and influences the CO tolerance of Pt–Ru/C.

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Section: Resultsmentioning

confidence: 84%

Section: Ent Decomposition Temperatures Of Pt and Ru Precursorsmentioning

confidence: 99%

Section: Ent Decomposition Temperatures Of Pt and Ru Precursorsmentioning

confidence: 99%

Section: Ent Decomposition Temperatures Of Pt and Ru Precursorsmentioning

confidence: 99%

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Suppression of Potential Oscillations in PEFCs by Using Anode Catalyst Prepared by Polygonal Barrel‐Sputtering Method

et al. 2010

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“…They found that the Au particles deposited by sputtering were more active for glycerol oxidation than those prepared using the PVA sol. The sputter deposition method has been reported to give uniform dispersion of metal on support; for example, Pt on Al 2 O 3 [7,8], Pt-Ru on carbon [9], Cu on SiC [10], and Au on Al 2 O 3 [11]. Such a sputter deposition method has been hardly used for the synthesis of supported catalyst because of highly expensive compared to impregnation method.…”

Section: Introductionmentioning

confidence: 99%

Carbon Oxidation Reaction over Pt/Spherical Alumina Beads Catalysts Prepared by Sputtering Method

et al. 2010

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Series Circuit of Organic Thin‐Film Solar Cells for Conversion of Water into Hydrogen

Aoki¹,

Naruse²,

Abe³

2013

ChemPhysChem

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A series circuit of bulk hetero-junction (BHJ) organic thin-film solar cells (OSCs) is investigated for electrolyzing water to gaseous hydrogen and oxygen. The BHJ OSCs applied consist of poly(3-hexylthiophene) as a donor and [6,6]-phenyl C61 butyric acid methyl ester as an acceptor. A series circuit of six such OSC units has an open circuit voltage (V(oc)) of 3.4 V, which is enough to electrolyze water. The short circuit current (J(sc)), fill factor (FF), and energy conversion efficiency (η) are independent of the number of unit cells. A maximum electric power of 8.86 mW cm(-2) is obtained at the voltage of 2.35 V. By combining a water electrolysis cell with the series circuit solar cells, the electrolyzing current and voltage obtained are 1.09 mA and 2.3 V under a simulated solar light irradiation (100 mW cm(-2), AM1.5G), and in one hour 0.65 mL hydrogen is generated.

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Physical and electrochemical properties of Pt–Ru/C samples prepared on various carbon supports by using the barrel sputtering system

Cited by 20 publications

References 17 publications

Suppression of Potential Oscillations in PEFCs by Using Anode Catalyst Prepared by Polygonal Barrel‐Sputtering Method

Suppression of Potential Oscillations in PEFCs by Using Anode Catalyst Prepared by Polygonal Barrel‐Sputtering Method

Carbon Oxidation Reaction over Pt/Spherical Alumina Beads Catalysts Prepared by Sputtering Method

Series Circuit of Organic Thin‐Film Solar Cells for Conversion of Water into Hydrogen

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