2015
DOI: 10.1016/j.electacta.2015.07.177
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Preparation and characterization of Pt/TiO 2 nanofibers catalysts for methanol electro-oxidation

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Cited by 38 publications
(15 citation statements)
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“…Furthermore, the effect of carbon content is nearly saturated when one moves from C/Ti at = 1.5 to C/Ti at = 3. The latter finding is likely due to an increase in electrode coating thickness (and thus in methanol mass mass transfer control of the peak current at film electrodes and, thus, its square root dependence on scan rate [47][48][49]) and concentration differences (accepting a 0.5 reaction order throughout the potential range studied [50]), the maximum current density of 19 mA mgPt −1 is within the wide 1-100 mA mgPt −1 range reported for TiO2-supported Pt electrodes [8,[10][11][12]32,[51][52][53][54][55] (with most of these electrodes not exceeding 50 mA mgPt −1 [8,10,12,32,[51][52][53]55]). Figure 4C presents the voltammetric data of the same LSV experiments with those of Figure 4A,B but with the current normalized per Pt EASA, as determined by CO electrodesorption experiments and/or (when clear voltammetry could be obtained, e.g., at Pt/C and (Pt-Ru)/C electrodes) by H desorption experiments (not shown here).…”
Section: Microscopic (Tem) and Spectroscopic (Eds Xps) Characterizatmentioning
confidence: 54%
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“…Furthermore, the effect of carbon content is nearly saturated when one moves from C/Ti at = 1.5 to C/Ti at = 3. The latter finding is likely due to an increase in electrode coating thickness (and thus in methanol mass mass transfer control of the peak current at film electrodes and, thus, its square root dependence on scan rate [47][48][49]) and concentration differences (accepting a 0.5 reaction order throughout the potential range studied [50]), the maximum current density of 19 mA mgPt −1 is within the wide 1-100 mA mgPt −1 range reported for TiO2-supported Pt electrodes [8,[10][11][12]32,[51][52][53][54][55] (with most of these electrodes not exceeding 50 mA mgPt −1 [8,10,12,32,[51][52][53]55]). Figure 4C presents the voltammetric data of the same LSV experiments with those of Figure 4A,B but with the current normalized per Pt EASA, as determined by CO electrodesorption experiments and/or (when clear voltammetry could be obtained, e.g., at Pt/C and (Pt-Ru)/C electrodes) by H desorption experiments (not shown here).…”
Section: Microscopic (Tem) and Spectroscopic (Eds Xps) Characterizatmentioning
confidence: 54%
“…These can be broadly classified as the ones involving modification of the material itself and those based on mixing it with a conducting material such as carbon. The former route includes partial reduction to TiO 2-x (i.e., conversion to Ebonex ® -like materials-see for example [8,9]) or/and incorporating C (activated carbon, reduced graphene oxide or carbon nanotubes) in the material [10][11][12][13][14][15][16][17][18][19][20][21]; the latter modification route is based either on simply mixing the TiO 2 -based material with C [10][11][12][13][14][15][16] or adding the carbonaceous material in the reaction mixture of catalyst preparation or modification (sol-gel chemistry, wet reduction chemistry, carbonization, etc.) [17][18][19][20][21].…”
Section: Introductionmentioning
confidence: 99%
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“…Cavaliere et al [166] also synthesized Pt supported on electrospun Nb-SnO 2 with a loose-tube structure as the cathode material for fuel cells, who studied in situ fuel cell operation under accelerated stress tests and confirmed that the voltage loss was negligible degradation. Electrospun Pt/TiO 2 NFs were also synthesized by electrospinning and the reductive impregnation method, which were used as electrocatalysts and exhibited high activities for methanol oxidation [167]. Electrospun Nb-TiO 2 NFs were investigated as electrocatalyst supports for PEMFCs [168].…”
Section: Applicationsmentioning
confidence: 99%