Pd Doped Co3O4 Loaded on Carbon Nanofibers as Highly Efficient Free-Standing Electrocatalyst for Oxygen Reduction and Oxygen Evolution Reactions

Abstract

Self-supporting electrodes usually show excellent electrocatalytic performance which does not require coating steps, additional polymer binders, and conductive additives. Rapid in situ growth of highly active ingredient on self-supporting electric conductors is identified as a straight forward path to prepare binder-free and integrated electrodes. Here, Pd-doped Co3O4 loaded on carbon nanofiber materials through electrospinning and heat treatment was efficiently synthesized, and used as a free-standing electrode. Benefiting from its abundant active sites, high surface area and effective ionic conduction capability from three-dimensional (3D) nanofiber framework, Pd-Co3O4@CNF works as bifunctional oxygen electrode and exhibits superior activity and stability superior to commercial catalysts.

Synthesis of CuxCo3−xO4 nanoparticles by a sonochemical method and characterization of structural and optical properties and photocatalytic activity for the degradation of methylene blue

“…20 Several metals are used to modify the Co 3 O 4 nanoparticles including Fe, Mn, Cu, Ni, Mo, 20,21 Ag, and Pd. 22,23 Jincy and Meena synthesized copper-doped cobalt oxide nanoparticles by a hydrothermal method and they observed that these nanoparticles exhibited extreme sensitivity towards NH 3 gas at room temperature even at a lower concentration of 5 ppm in comparison to undoped Co 3 O 4 . 24 In another work, Cu-doped Co 3 O 4 nanosheets obtained by a solvothermal method show enhanced electrochemical performance due to the reduced particle size and larger surface area.…”

Spin configuration modulation of Co3O4 by Ru doping for boosting the overall water splitting and hydrazine oxidation reactions

“…Weng and coworkers fabricated Pd-doped Co 3 O 4 anchored on carbon nanofiber as a bifunctional catalyst for the OER and oxygen reduction reaction (ORR). 31 Wei et al developed Ir-doped Co 3 O 4 with a low Ir loading of 2.88 wt% for efficient acidic OER. 32 Despite the progress, most of the previously reported heterometal-doped Co 3 O 4 displayed unsatisfactory HER electrocatalytic activity in comparison with Pt-based electrocatalysts, which becomes a major concern for alkaline OWS.…”