Early stages in the oxidation of ethanol at low index single crystal platinum electrodes

Pt-based anode catalysts for direct ethanol fuel cells

“…For methanol electro-oxidation, Pt-Sn catalytic activity and their optimum atomic ratio are still controversial at present. In addition to the oxidation of intermediates, such as CO ads , the cleavage of C-C bond plays a very important role [7] in the reaction of ethanol complete electro-oxidation to CO 2 increasing energy conversion efficiency and fuel utilization. The complexity of this reaction and the presence of so many intermediates require the development of novel anode catalysts, able to break the C-C bond at low temperature, to release 12 electrons and to completely oxidize the poisoning species at lower overpotentials.…”

Trimetallic catalyst based on PtRu modified by irreversible adsorption of Sb for direct ethanol fuel cells

“…This band is due to overlapping of the C-H region (2700-3000 cm −1 ) and the OH from carboxyl group between 2500 and 3000 cm −1 and is attributed to the products of incomplete ethanol oxidation (acetic acid and acetaldehyde) [34]. This feature is observed for both PtRu/C and PtRu/C-Sb catalysts and becomes more intense with increasing the potential, suggesting higher oxidation rate.…”

“…Other observed bands are at 2341 cm −1 the C-O asymmetric stretching from CO 2 [34,35]; at 1710 cm −1 the C=O stretching from carbonyl groups either from acetic acid and acetaldehyde [36]; the bands at 1282, 1370-1390 cm −1 from C-O stretching and CH 3 bending from acetic acid [36] and, finally a band at 1114 cm −1 of CH 3 wagging from acetaldehyde [37] that overlaps with ClO 4 -band from the supporting electrolyte…”

Enhancement of Ethanol Oxidation Reaction on Pt (PtSn)-Activated Nickel Foam Through In situ Formation of Nickel Oxy-Hydroxide Layer

“…0.50-0.90 V) upon the reverse scan towards the hydrogen reversible potential is generally assigned to the process of surface oxidation of CO ads. species [16,[24][25][26].…”

“…Platinum [4,[24][25][26][27][28] and especially PtSn [1,2,27,[29][30][31][32] catalysts are well-known to exhibit superior electrocatalytic properties towards the EOR. Thus, in this contribution, Ptand PtSn-modified Ni foam electrodes were prepared by means of spontaneous deposition methods [16,30,33,34].…”