Effect of the Reduction Temperature of PdAg Nanoparticles during the Polyol Process in the Ethanol Electrooxidation Reaction
Table 3
Potential at peak maximum (PPM), onset potential (OP), and peak current density for some Pd-based catalysts reported for ethanol electrooxidation in alkaline solutions.
Catalytic system
MPP (V)
OP (V)
Peak current density
Comments
Pd92Ag8 Pd79Ag21 Pd66Ag34
−0.302 (vs SCE) −0.244 −0.291
−0.8 (vs SCE) −0.8 −0.8
3.46 mA cm−2 5.17 2.44
Reaction conditions: 1.0 M NaOH + 1 M ethanol, scan rate of 20 mVs−1Catalysts synthesized by electroless deposition [19]
10%Pd-5%Ag
−0.09 (vs Hg/HgO)
−0.65 (vs Hg/HgO)
2.5 mA
Reaction conditions: 1.0 M KOH + 1 M ethanol, 50 mVs−1, 24°C.Carbon-supported catalyst synthesized by co-reduction of silver and palladium nitrate with Na3C6H5O7 + NaBH4 [17]
−0.1 (vs Hg/HgO)
−0.65 (vs Hg/HgO)
8 mA cm−2
Carbon-supported catalysts synthesized by an impregnation-reduction method using hydrogen gas at high temperature.
−0.05 (vs Hg/HgO)
−0.65 (vs Hg/HgO)
7 mA cm−2
Reaction conditions: 1 M NaOH + 1 M ethanol, 10 mVs−1 at room temperature [18]
−0.15 (vs Hg/HgO)
−0.6 (vs Hg/HgO)
6 mA cm−2
Catalyst supported on Nb0.2-doped-Ti0.8O2 by polyol process.Reaction condition: 1 M KOH + 1 M ethanol, 50 mVs−1 [20]
PdAg Nanotube
−0.09 (vs Hg/HgO)
−0.77 (vs Hg/HgO)
13.58 mA cm−2
Catalyst synthesized by polyol process and used without support.Reaction condition: 1 M KOH + 1 M ethanol, 50 mVs−1 [21].
−0.1 (vs Hg/HgO)
0.801 (vs Hg/HgO)
800 m
Carbon-supported catalyst synthesized through a solution phase-nanocapsule method.Reaction conditions: 1 M NaOH + 1 M ethanol, 50 mVs−1, room temperature [22]
