TiO2 Nanotube-Carbon (TNT-C) as Support for Pt-based Catalyst for High Methanol Oxidation Reaction in Direct Methanol Fuel Cell

Table 3 Characteristics of Pt-based electrocatalyst and electrochemical performance

Sample	Electrode potential (V)	EASA (Pt or Pt-Ru)	Current density (mA/cm²), j _f	Current density (mA/cm²), j _r	j _f/j _r
A	0.92	0.79	3.30	1.66	2.0
B	1.02	0.77	2.77	1.55	1.79
C	0.74	1.39	1.25	0.99	1.26
D	0.75	1.37	1.46	1.21	1.21

Note: [A]: Pt-Ru/TNT/C, [B]: Pt/TNT/C, [C]: Pt-Ru/C, [D]: Pt/TiO₂ nanoparticles
j _f forward oxidation peak of current density, j _r reverse oxidation peak of current density, EASA electrochemical active surface area