Preparation of supported PtRu/C electrocatalyst for direct methanol fuel cells

Ultrasonically treated multi-walled carbon nanotubes (MWCNTs) as PtRu catalyst supports for methanol electrooxidation

“…5. For comparison, In the high potential range, in which the oxidation is usually attributed to the linear-bonded CO ads [23], the PtRu/S-MWCNTs nanocomposite has a peak potential of 0.59 V, which is 100 and 350 mV lower than the PtRu/R-MWCNTs (0.71 V) and the PtRu/MWCNTs (0.89 V), respectively. Consequently, the ultrasonically treated MWCNTs as supports for the PtRu catalysts have an excellent CO-tolerant performance.…”

Porous platinum mesoflowers with enhanced activity for methanol oxidation reaction

“…In current case, The noteworthy electrochemical catalytic performance of Pt MFs can be attributed to their unique 3-dimensional architecture, where the interconnected interstices and channels extending in all three dimensions allow the rapid diffusion and mass transport of external reagents directly to the surface of Pt catalysts, as well as unblocked transport of electrons, which contributes greatly to the enhancement of catalytic properties [46][47][48][49][50][51][52][53][54][55][56]. As for the Pt-Ag alloys, it is well known that methanol electrooxidation occurs preferentially on electrode surfaces with continuous neighboring Pt sites [50].…”

“…The polarization currents of all the present catalysts decrease rapidly at the initial stage. This may be due to the formation of intermediate species, such as CO ads , COOH ads , and CHO ads , during the methanol oxidation reaction [52][53][54]. And the following 3 OH for specific area current and specific mass current, respectively; (d) Comparison of peak specific area current and peak specific mass current of Pt MFs, Pt-Ag MFs and Pt black.…”

Dealloyed porous gold anchored byin situgenerated graphene sheets as high activity catalyst for methanol electro-oxidation reaction

“…P1 electrodes, a rapid current decay appears within the limited seconds, accompanying by a slow drop until it reaches a smooth state. According to the literature,74 the formation of double layer capacitance leads to the fast drop at rst, and the following decay of the CAs is related to the accumulation of intermediate species during the process of methanol decomposition. The current density gradually reaches a quasi-equilibrium steady state with the further polarization.…”