High-throughput screening of binary catalysts for oxygen electroreduction

Liu, Jing Hua; Jeon, Min Ku; Woo, Seong Ihl

doi:10.1016/j.apsusc.2005.07.076

Cited by 39 publications

(52 citation statements)

References 25 publications

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“…Since that study, ) was observed in the Pt(50)Ru(10)Fe(20)Se(10)/C catalyst than for the Pt/C catalyst 6.51 lA cm pt various techniques have been employed for library synthesis (solution dispensing [22], physical vapour deposition [23,24] and electrodeposition [25]) and characterisation (optical screening [21,26], multielectrode half-cell [27,28], multielectrode single cell [29] and scanning electrochemical microscopy [30,31]) [32]. Although, various systems such as PtCo [33], PdCo [34], PtCoCr [35], PtTi [36], PtPdAu [37], RuFe [38], PtRuIr and PtRuPd [39] have been investigated for ORR activity via the combinatorial method, there have been no reports of methanol tolerant ORR catalysts investigated via the combinatorial synthesis and high-throughput screening methods.…”

Section: Introductionmentioning

confidence: 99%

Combinatorial Search for Quaternary Methanol Tolerant Oxygen Electro‐Reduction Catalyst

et al. 2010

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A combinatorial library containing 645 different compositions was synthesised and characterised for methanol tolerant oxygen electro‐reduction reaction (ORR) catalytic performance. The library was composed of compositions involving between 1 and 4 metals among Pt, Ru, Fe, Mo and Se. In an optical screening test, Pt(50)Ru(10)Fe(20)Se(10) composition exhibited the highest ORR activity in the presence of methanol. This composition was further investigated by synthesis and characterisation of a powder version catalyst [Pt(50)Ru(10)Fe(20)Se(10)/C]. At 0.85 V [vs. reversible hydrogen electrode (RHE)] in the absence of methanol, the Pt/C catalyst exhibited higher ORR current (0.0990 mA) than the Pt(50)Ru(10)Fe(20)Se(10)/C catalyst (0.0902 mA). But much higher specific activity (12.7 μA cmpt–2) was observed in the Pt(50)Ru(10)Fe(20)Se(10)/C catalyst than for the Pt/C catalyst 6.51 μA cmpt–2). In the presence of methanol, the ORR current decreased by 0.0343 and 0.247 mA for the Pt(50)Ru(10)Fe(20)Se(10)/C and Pt/C catalysts, respectively, which proved the excellent methanol tolerance of the Pt(50)Ru(10)Fe(20)Se(10)/C catalyst.

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Section: Introductionmentioning

confidence: 99%

Combinatorial Search for Quaternary Methanol Tolerant Oxygen Electro‐Reduction Catalyst

et al. 2010

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“…Claus et al [5] applied scanning mass spectrometry to the analysis of reaction products on catalyst libraries, where each detection took only 60 s per catalyst. Liu et al [6] investigated the catalytic performance in terms of the oxygen reduction performance of Pt based and non-Pt based catalysts for applications in PEMFC and DMFC. Fleischauer and co-workers developed useful techniques for combinatorial electrochemistry, namely, a multichannel pseudopotentiostat [7] and a 64 channel combinatorial electrochemical cell [8], their interest being mainly directed towards battery applications [9,10].…”

Section: Introductionmentioning

confidence: 99%

Combinatorial electrochemistry on Al–Fe alloys

Mardare

Yadav

Wieck

et al. 2008

Science and Technology of Advanced Materials

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Combinatorial material development was combined with high throughput microelectrochemistry to allow an efficient but comprehensive investigation of the interface chemistry of Al rich Al-Fe alloys as a function of their chemical composition. Composition spread thin films with a linear composition gradient were produced by thermal codeposition. A scanning droplet cell was used to determine the open circuit potential and to perform successive anodic oxide formation with intermittent impedance spectroscopy. The film formation factor, the relative permittivity of the oxides and the onset potential of oxide formation were determined quantitatively as function of the composition with a resolution of 0.5 at.%. An unexpected synergistic effect is found in a very narrow composition range between 9 and 12 at.% Fe. This effect, which shifts the onset potential by nearly 1 V, is discussed in terms of a local accumulation of Fe resulting in a redox stabilisation of space charge layer formation during high-field oxide growth. The results are supported by composition and depth dependent XPS measurements.

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“…High throughput optical screening of Pt-based bimetal catalysts studies reveal that the PtBi/C is one of the combinations which shows the combined effect of higher oxygen reduction activity and methanol-tolerance with acceptable stability that fulfils the requirements of a cathode catalyst [39]. Figure 8 compares the histograms of the mass activity of the Pt/C and Pt-Bi/C catalysts for oxygen reduction in 0.5 M sulphuric acid both in presence and absence of methanol.…”

Section: Orr Study On Pt/c and Pt-bi/c Alloy Catalysts In The Presencmentioning

confidence: 98%

Study of Methanol‐tolerant Oxygen Reduction Reaction at Pt–Bi/C Bimetallic Nanostructured Catalysts

Remona

Phani

2011

Fuel Cells

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The nanostructured platinum–bismuth catalysts supported on carbon (Pt3Bi/C, PtBi/C and PtBi3/C) were synthesised by reducing the aqueous metal ions using sodium borohydride (NaBH4) in presence of a microemulsion. The amount of metal loading on carbon support was found to be 10 wt.‐%. The catalyst materials were characterised by X‐ray diffraction (XRD), X‐ray fluorescence (XRF), transmission electron microscope (TEM) and electroanalytical techniques. The Pt3Bi/C, PtBi/C and PtBi3/C catalysts showed higher methanol tolerance, catalytic activity for oxygen reduction reaction (ORR) than Pt/C of same metal loading. The electrochemical stability of these nano‐sized catalyst materials for methanol tolerance was investigated by repetitive cycling in the potential range of –250 to 150 mVMSE. Bi presents an interesting system to have a control over the activity of the surface for MOR and ORR. All Pt–Bi/C catalysts exhibited higher mass activities for oxygen reduction (1–1.5 times) than Pt/C. It was found that PtBi/C catalyst exhibits better methanol‐tolerance than the other catalysts.

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High-throughput screening of binary catalysts for oxygen electroreduction

Cited by 39 publications

References 25 publications

Combinatorial Search for Quaternary Methanol Tolerant Oxygen Electro‐Reduction Catalyst

Combinatorial Search for Quaternary Methanol Tolerant Oxygen Electro‐Reduction Catalyst

Combinatorial electrochemistry on Al–Fe alloys

Study of Methanol‐tolerant Oxygen Reduction Reaction at Pt–Bi/C Bimetallic Nanostructured Catalysts

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