Highly Active PdCu Alloy Nanowire Network Electrocatalyst for Ethanol and Methanol Electrooxidation

Abstract

PdCu alloy nanowire networks (NNWs) with tunable compositions are synthesized. Electrooxidaton catalytic measurements prove that the as‐prepared PdCu NNWs represent a predominant catalyst for methanol and ethanol electrooxidation reactions in alkaline medium. With increasing copper content, the electrocatalytic activity of the catalytic materials to ethanol and methanol was significantly increased. Pd27Cu73 NNW‐modified electrodes display superior catalytic activity (8300 A gPd−1) toward the ethanol electrooxidation compared to commercial Pd/C‐modified electrodes (700 A gPd−1). PdCu NNWs have great potential as electrocatalysts for fuel cells.

Facile Synthesis of PdCu Echinus‐Like Nanocrystals as Robust Electrocatalysts for Methanol Oxidation Reaction

“…As illustrated in Figure c, the peaks situated at 335.5 eV and 340.8 eV are attributed to metallic state of Pd. And the peaks located at 336.9 eV and 342.0 eV can be ascribed to Pd II . It is readily found that metallic state is the dominated chemical valence state of Pd in PdCu NCs by comparing the intensity of these peaks.…”

“…And the peaks located at 336.9 eV and 342.0 eV can be ascribed to Pd II . [48,49] It is readily found that metallic state is the dominated chemical valence state of Pd in PdCu NCs by comparing the intensity of these peaks. Similarly,a si llustrated in Figure 3d,t he peaks situated at 932.0 and 954.1 eV are assigned to metallic state of Cu and the weaker peaks situated at 934.4 and 954.1 eV suggest the existence of Cu II .T he satellite peaks situated at 942.3 and 963.2 eV are corresponded to CuO whicha re caused by oxidation of Cu on the surface of PdCu NCs.…”

Recent Advances in Bio‐Templated Metallic Nanomaterial Synthesis and Electrocatalytic Applications

“…The one dimensional network is characterized by its high electron transport rate as a result of the path‐directing effect of the structure anisotropy [169,226,227] as well as the large surface area provided by the protein support [70] . The polyhedrin was also reported to be a versatile template for the synthesis of PdCu alloy nanowire networks and further applied to methanol and ethanol electrooxidation [168] . By tuning the Pd/Cu ratio, it was found that with increasing Cu content, the catalytic activity also increased, which was attributed to the Cu modifying the d‐band structure of Pd and thus changing the interatomic charge transfer between the two components.…”

Surface‐Roughened Pt‐Decorated Pd Nanoparticles as Efficient Electrocatalysts for Direct Alcohol Fuel Cells

“…Thus, it is essential to reduce the quantity of Pt utilised in fuel cells. It has already been reported that palladium‐based nanostructured materials offered moderate catalytic activity for various electrochemical reactions in fuel cells . There are few reports on the usage of Pd NPs for direct methanol and ethanol fuel cells (DMFCs and DEFCs) …”