Palladium–copper alloys as catalysts for the oxygen reduction reaction in an acidic media I: Correlation between the ORR kinetic parameters and intrinsic physical properties of the alloys

Beyond 1.0 W cm−2Performance without Platinum: The Beginning of a New Era in Anion Exchange Membrane Fuel Cells

“…Compared to Pt/C, the PdCu/C catalyst exhibited a halfwave potential that was 50 mV more positive, indicating improved ORR kinetics 21 that can be ascribed to the synergistic effect of alloying Pd and Cu in the B2-type structure, where the lower resulting oxygen binding energy makes the dissociation of intermediate OOH species more facile. 22,23 CVs for the Pd-CeO 2 /C catalyst were also recorded at room temperature in N 2 -saturated 0.1 M KOH electrolyte at a sweep rate of 20 mV s −1 ( Figure 2B). It was observed that the H upd potential shifted negatively by ca.…”

Recent Development of Pd-Based Electrocatalysts for Proton Exchange Membrane Fuel Cells

“…Kariuki et al [204] prepared monodispersed PdCu alloy nanoparticles, which showed high ORR activity in acidic electrolyte. Fouda-Onana et al [205] found Pd50Cu50 exhibited the high activity in ORR. The enhancement was attributed to an optimal d-band property that made the OOH dissociative adsorption easier, which was considered as chemical rate determining step (RDS) for the ORR [236,237].…”

“…Pd/C / 0.87 A/5 mV s −1 /1600 rpm [195] Pt/C (JM) / 1.05 A/5 mV s −1 /1600 rpm [195] Pd-PPy/C / 0.82 (NHE) A/5 mV s −1 /1600 rpm [196] 40% E-TEK Pt/C / 0.98 (NHE) A/5 mV s −1 /1600 rpm [196] Pd/Vulcan XC-72R 47 at 0.7 V * 0.82 A/5 mV s −1 /1600 rpm [197] 20% E-TEK Pt/C 0.92 A/5 mV s −1 /1600 rpm [197] E-Tek 20% Pd/C 23 at 0.7 V * 0.77 A/5 mV s −1 /1600 rpm [197] PdFe-WC/C / 0.91 A/10 mV s −1 /1600 rpm [198] Pt50Au50/CexC 4.1 at 0.7 V * / A/5 mV s −1 /1600 rpm [180] PdCoMo/CDX975 4.1 at 0.7 V * 0.915 A/5 mV s −1 /1600 rpm [199] Pd/CDX975 1.6 at 0.7 V * 0.84 A/5 mV s −1 /1600 rpm [199] Pd100−xWx / 0.85 A/5 mV s −1 /1600 rpm [200] Pd / 0.7 A/5 mV s −1 /1600 rpm [200] PdPt/C / 0.98 A/5 mV s −1 /1600 rpm [201] Pt rich-core Pd rich-shell 9 at 0.85 V * (catalyst) / A/5 mV s −1 /1600 rpm [202] JM20 Pt/C 5.8 at 0.85 V * (catalyst) / A/5 mV s −1 /1600 rpm [202] Pd/Au 0.34 at 0.8 V * / A/10 mV s PdCu/C 23 at 0.9 V * 0.96 B/10 mV s −1 /1600 rpm [204] Pd-Cu film / 0.86 B/5 mV s −1 /1000 rpm [205] Pd-Co/C 3.6 at 0.7 V * / B/5 mV s −1 /1600 rpm [206] Pt-Pd/C / 0.92 B/5 mV s −1 /1600 rpm [207] Pd/GNS 280 at 0.9 V * 1.06 C/10 mV s −1 /1600 rpm [188] Pt/GNS 110 at 0.9 V * 1.0 C/10 mV s −1 /1600 rpm [188] Pd@MnO2/C 450 at 0.9 V * 1.02 D/10 mV s −1 /2500 rpm [214] Pd black 180 at 0.9 V * 1.07 D/10 mV s −1 /2500 rpm [214] * The potentials were vs. RHE; **solution A: 0. …”

Preparation of PdCu Alloy Nanocatalysts for Nitrate Hydrogenation and Carbon Monoxide Oxidation

“…In addition to the interests in CO oxidation and electrocatalytic reduction of O 2 over Pd based alloy catalysts, there has also been increasing interest in studies of such catalysts in catalytic oxidation, hydrogenation, and combustion of different hydrocarbons [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][28][29][30][31][32][33] and in catalytic reduction of inorganic ions in solutions. One example of recent interests the catalytic reduction of nitrate pollutants in groundwater from industrial and domestic effluents.…”