2017
DOI: 10.1016/j.ijhydene.2016.11.164
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Heat-treatment effects on the ORR activity of Pt nanoparticles deposited on multi-walled carbon nanotubes using magnetron sputtering technique

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Cited by 67 publications
(36 citation statements)
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“…It has been reported previously, that pyridinic and/or graphitic N are actually responsible for the high ORR performance of N-doped carbon materials. [42,56] According to previous reports, the change of the slope is not related to different reaction mechanism, but it has been attributed to the potential-dependent coverage of surface oxides on Pt catalyst that inhibit the adsorption of O 2 and reaction intermediates. Tafel slope values were determined from two characteristic Tafel regions and are presented in Tables 1 and 2.…”
Section: Electrochemical Reduction Of Oxygenmentioning
confidence: 92%
See 1 more Smart Citation
“…It has been reported previously, that pyridinic and/or graphitic N are actually responsible for the high ORR performance of N-doped carbon materials. [42,56] According to previous reports, the change of the slope is not related to different reaction mechanism, but it has been attributed to the potential-dependent coverage of surface oxides on Pt catalyst that inhibit the adsorption of O 2 and reaction intermediates. Tafel slope values were determined from two characteristic Tafel regions and are presented in Tables 1 and 2.…”
Section: Electrochemical Reduction Of Oxygenmentioning
confidence: 92%
“…Nevertheless, trace amount of Cl À anions may remain from precursors and further exacerbate the catalyst efficiency by blocking Pt surface active sites. [41][42][43][44] Formation of the Pt surface oxides can be seen in the anodic sweep at a potential above 0.8 V in both media, which are reduced at~0.7 V in the cathodic sweep. In PEM fuel cells, chloride impurities arise from the membrane electrode assembly (MEA) preparation and less than 5-ppm of chloride residues can result in a voltage loss of 50 mV and affect the open-circuit voltage.…”
Section: Co-stripping and CV Experimentsmentioning
confidence: 99%
“…The thermal treatment results are in accordance with the researches performed by Hussain etc. on MWCNTs . What's more, comparing with the solvothermal synthesized PtNi alloy developed by Carpenter etc .…”
Section: Resultsmentioning
confidence: 87%
“…The Tafel slope values for all Pt/MWCNT-A (Figure 7a) and Pt/MWCNT-B (Figure 7b) electrodes were close to −60 and −120 mV dec −1 at low current densities and higher current densities, respectively, which indicated that all the electrodes followed the same mechanistic pathway and that the rate of the ORR is determined by the transfer of the first electron to the adsorbed O 2 molecule. 32,34,62 The specific activity (SA) values of the Pt/MWCNT electrodes for ORR were calculated from the equation given below:…”
Section: Resultsmentioning
confidence: 99%
“…• C. 32 Gasteiger and co-workers obtained SA values of 0.20 mA cm −2 at 0.9 V in acid electrolyte for state-of-the-art Pt/C catalysts. 63 Li et al studied composite materials prepared by mixing Pt-coated reduced graphene oxide with carbon black.…”
Section: Resultsmentioning
confidence: 99%