Carbon-supported Pd–Fe electrocatalysts for oxygen reduction reaction (ORR) and their methanol tolerance

Thiolated graphene oxide-supported palladium cobalt alloyed nanoparticles as high performance electrocatalyst for oxygen reduction reaction

“…For instance, the mass activity of ER/PdCo-tGO was 3.1 times higher at kinetic region (329.1 mA mg À1 Pd at 0.8 V) and 2.8 times higher at diffusion-limited region (742 mA mg À1 Pd at 0.1 V) than that of state-of-the-art Pt/C (Fig. 6 inset); also, higher than other previous reports [9,13,14,16,39]. The surface area of electrode normalized current density (mA cm À2 ) can be seen in the Fig.…”

“…Also, the binary alloying is an effective way to improve the electrocatalytic activity and tolerance to poisoning intermediates of Pd-based electrocatalysts [7,12]. To improve the catalytic activity of Pd, several transition metals have been added into Pd-based alloyed electrocatalysts, such as, Cu [9], Ni [6,7], Fe [13], Co [12,14], W [15], Au [16], etc. The addition of a transition metal element, such as, cobalt (Co) to Pd can significantly improve the overall catalytic activities of Pd due to the bimetallic promotional and synergistic effects [17].…”

The role of surface oxygenated-species and adsorbed hydrogen in the oxygen reduction reaction (ORR) mechanism and product selectivity on Pd-based catalysts in acid media

“…6c). [8][9][10][64][65][66][67] The peroxide generation features with Pt have been investigated by various groups. 63 Soon after the electrochemical reduction, when the Pd nanoparticles are exposed to atmospheric oxygen, a passive oxygen coverage is formed at the surface.…”

Palladium-Based Catalysts as Electrodes for Direct Methanol Fuel Cells: A Last Ten Years Review

“…Neergat et al investigated Pd-Fe alloys supported on carbon black, obtaining materials with high activity toward the ORR in comparison with the behavior observed for a Pd/C. Particularly, the Pd 3 Fe/C catalyst displayed a half-wave potential more positive (>100 mV compared with that from Pd/C) and even similar than that of Pt/C with the same noble metal content [76]. Moreover, this catalyst showed both, a similar hydrogen peroxide production than that of Pt/C, but lower than that from Pd/C.…”