Heat treatment and potential cycling effects on surface morphology, particle size, and catalytic activity of Pt/C catalysts studied by 13C NMR, TEM, XRD and CV

Effect of heat treatment on the activity and stability of carbon supported PtMo alloy electrocatalysts for hydrogen oxidation in proton exchange membrane fuel cells

“…treated at different temperatures, ranging from 400 to 700 C. As can be seen, the PtMo/C electrocatalyst heat-treated at 600 C, showed the highest hydrogen electro-oxidation activity in the presence of CO. This behavior may be related to the formation/ stabilization of active Mo species for hydrogen oxidation in the presence of CO at 600 C. Also, Han et al [38] illustrated that the CO oxidation activity of Pt can be improved significantly by heat treatment and this enhances the hydrogen oxidation process. From here onward only the as-prepared PtMo/C catalyst and the heattreated at 600 C will be discussed.…”

Mesoporous carbons as low temperature fuel cell platinum catalyst supports

“…For the CMK3Pt-20 catalyst the average particle diameter is set around 1.7 nm. These values are not far from the average particle diameters of both Pt 20%/C Vulcan XTC72R and Pt 10%/C Vulcan XTC72R catalysts which have been evaluated around 2.0 nm, according to HRTEM analyses carried out in our laboratory, the ETEK website and literature [21].…”

Electrocatalytic performance of bimetallic platinum–ruthenium nanoclusters supported on graphite nanofibers

“…The results were in agreement with the results calculated from the XRD patterns, but it exhibited slightly bigger than the XRD data. Han et al [25] reported that if metal particles are consisting of more than one crystallite, the particle sizes measured by XRD would be smaller than those obtained by TEM. There is a higher probability of polycrystalline particles for the samples of bigger Pt sizes, in general.…”