Effect of oxidative heat-treatment on electrochemical properties and oxygen reduction reaction (ORR) activity of Pd–Co alloy catalysts

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

“…2). 44 Recently, similar oxide reduction behavior of graphene oxide with potential cycling is also reported by Kar et al; the decrease in the reduction charge was attributed to the removal of oxygenated species from the graphene oxide structure. S2, ESI †).…”

“…44 The as-prepared Pd and Pd 3 Co catalysts were subjected to heat-treatment at 400 1C for 1 h in an oxygen-containing atmosphere (5% oxygen and 95% argon) to obtain palladium oxide-based catalysts. 44 The as-prepared Pd and Pd 3 Co catalysts were subjected to heat-treatment at 400 1C for 1 h in an oxygen-containing atmosphere (5% oxygen and 95% argon) to obtain palladium oxide-based catalysts.…”

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].…”

Nanostructured palladium tailored via carbonyl chemical route towards oxygen reduction reaction

“…Among platinum group metals, palladium-based cathode catalysts for low-temperature fuel cell received lots of attention because of their catalytic performance towards the oxygen reduction reaction (ORR) [1][2][3][4]. However, the development of Pd-based catalysts is a great challenge, since the control of morphology for such nano-materials is still under investigation.…”