Adsorption/oxidation of CO on highly dispersed Pt catalyst studied by combined electrochemical and ATR-FTIRAS methods

Effect of an Sb-Doped SnO2 Support on the CO-Tolerance of Pt2Ru3 Nanocatalysts for Residential Fuel Cells

“…All of the band intensities increased with CO adsorption time and reached nearly steady-state levels after 2 h. It was also confirmed from the CO-stripping voltammogram observed after 2 h of in situ FTIR measurement that the value of θCO was approximately 90% for both catalysts. Similar to the case of the CO adsorption process observed for various Pt2Ru3/CB, Pt/C or Pt black catalysts [19][20][21], the time courses of the spectra in Figure 5 indicate that each band (COL, CO-Ru, and COB(Pt-Pt)) consists of multiple components. It is most likely that this multiplicity can be ascribed to the fact that CO is adsorbed on slightly different sites (such as terraces or step/edge sites), even though the configuration of COad is identical.…”

“…In order to analyze the changes in the integrated intensity of each band, we deconvoluted these bands into several symmetric Gaussian peaks in a manner similar to that described in our previous work [19,20]. The curve fitting was performed for all of the spectra with the full width at half maximum (FWHM) as a constant and allowing the peak wavenumbers and areas to vary.…”

“…The potential of 0.02 V for CO adsorption was precisely the same as that examined in the CFE experiment described above. The bands observed around 2000 cm −1 , 1950 cm −1 and 1800 cm −1 were assigned to CO ad with the configuration of linear (on-top) (CO L ), bridged on Ru-Ru sites and Ru-Pt sites (CO-Ru, consisting of CO B (Ru-Ru) and CO B (Ru-Pt)), and bridged on Pt-Pt pair sites (CO B (Pt-Pt)), respectively [19][20][21]. All of the band intensities increased with CO adsorption time and reached nearly steady-state levels after 2 h. It was also confirmed from the CO-stripping voltammogram observed after 2 h of in situ FTIR measurement that the value of θ CO was approximately 90% for both catalysts.…”

Catalysts for the electro‐oxidation of small molecules

“…We ascribed them to the simultaneous adsorption of COs at the terrace and step edge sites. [35] The second important observation was a Change in ATR-IRA spectra observed at 60…”

Research and Development of Highly Active and Durable Electrocatalysts Based on Multilateral Analyses of Fuel Cell Reactions

“…[1][2][3][4] For PEFC anode and cathode catalysts, the activity and its degradation have been analyzed by multilateral techniques such as X-ray photoelectron spectroscopy combined with an electrochemical cell (EC-XPS), 2,[5][6][7][8] in situ Fourier-transform infrared spectroscopy (FTIR), [9][10][11][12][13][14][15][16][17][18][19][20][21][22] electrochemical quartz crystal microbalance (EQCM), [23][24][25][26] in situ scanning tunneling microscopy (STM), [27][28][29][30][31] in addition to conventional electrochemical measurements such as rotating disk electrode (RDE), [32][33][34] channel flow electrode (CFE), 21,35,36 and channel flow double electrode (CFDE) methods. [37][38][39][40][41][42] Based on these results, new practical catalysts have been synthesized.…”