Investigation of methanol oxidation on unsupported platinum electrodes in strong alkali and strong acid

Electrooxidation of adsorbed CO on Pt(111) and Pt(111)/Ru in alkaline media and comparison with results from acidic media

“…In addition, studies of methanol oxidation on Pt in alkaline media are to be noted [13][14][15][16][17], including some using Pt single crystals [18,19], and these studies have demonstrated a higher activity for methanol oxidation than in acid media. Tripkovi c et al propose that in alkaline media, methanol oxidation on Pt occurs primarily through a parallel mechanism (a dual path [20]) that does not involve formation of CO [21].…”

Hydrothermal synthesis of PtRu on CNT/SnO2 composite as anode catalyst for methanol oxidation fuel cell

“…The PtRu/SnO 2 /CNT electrocatalyst showed a lower onset potential (0.33 V) than the PtRu/CNT catalyst (0.37 V) and Pt/SnO 2 /CNT catalyst (0.45 V). The forward peak current density (I f ) is generally regarded as methanol oxidation on non-poisoned catalysts, while the backward peak current density (I b ) is associated with methanol oxidation on regenerated catalysts (after the removal of the carbonaceous intermediate) [28]. The I f to I b ratio, is an index of the catalyst tolerance to the poisoning species.…”

Electrocatalysis in the Direct Methanol Alkaline Fuel Cell

“…Cyclic voltammetry (CV) is commonly used to investigate oxidation of organics such as methanol. At a platinum electrode in 1 M methanol in 6 M KOH [12] an anodic peak appears at À0.6 V (vs NHE) with a maximum peak current at À0.04 V. The current then declines until a potential of À0.2 V, where the less active PtO 492j 13 Electrocatalysis in the Direct Methanol Alkaline Fuel Cell monolayer inhibits methanol oxidation. The following mechanism was proposed (Equations 13.8) [24]:…”