Rapid Aqueous Synthesis of Large‐Size and Edge/Defect‐Rich Porous Pd and Pd‐Alloyed Nanomesh for Electrocatalytic Ethanol Oxidation

Abstract

In this work, a facile aqueous synthesis strategy was used (complete in 5 min at room temperature) to produce large-size Pd, PdCu, and PdPtCu nanomeshes without additional organic ligands or solvent and the volume restriction of reaction solution. The obtained metallic nanomeshes possess graphene-like morphology and a large size of dozens of microns. Abundant edges (coordinatively unsaturated sites, steps, and corners), defects (twins), and mesopores are seen in the metallic ultrathin structures. The formation mechanism for porous Pd nanomeshes disclosed that they undergo oriented attachment growth along the h111i direction. Owing to structural and compositional advantages, PdCu porous nanomeshes with certain elemental ratios (e. g., Pd 87 Cu 13 ) presented enhanced electrocatalytic performance (larger mass activity, better CO tolerance and stability) toward ethanol oxidation.

Noble metal nanodendrites: growth mechanisms, synthesis strategies and applications

“…These obtained nanomaterials have shown remarkable performances in various electrocatalyses. [12][13][14][15][16][17][18][19] The physical and chemical properties of noble metal nanocrystals can be extensively tailored by adjusting their size and shape. 20 Some nanocatalysts with different morphologies (e.g., cubes and octahedrons) can expose different crystal facets, which bring about different atomic arrangements on the surface and directly affect the adsorption energy of intermediates in catalytic reactions.…”

Bismuth Incorporation in Palladium Hydride for the Electrocatalytic Ethanol Oxidation with Enhanced CO Tolerance

“…41 Bao's group reported large-size, edge-/defect-rich porous Pd and PdCu nanomeshes with enhanced electrocatalytic performance toward EOR. 42 Zhang and his colleagues successfully synthesized PdPtBi networked nanowires to boost the activity and stability for EOR. 43 Therefore, the advantages of the network structure provide strong guidance for the design of catalysts.…”

Facet-Controlled PdP Nanosheets for Ethanol Electrooxidation

“…At present, many types of electrocatalysts have been reported, such as (non)­platinum-based noble metal catalysts, transition metal oxides, and transition metal phosphates. − Enormous evidence showed that Pd-based nanocatalysts exhibited better activity toward EOR than Pt-based nanocatalysts − so that Pd-based nanocatalysts were considered as the most likely alternatives to Pt-based catalysts. Introducing nonmetallic phosphorus (P) with high electronegativity into Pd catalysts can effectively improve the intrinsic activity of the nanocatalysts.…”