Composition-tunable synthesis of Pt–Cu octahedral alloy nanocrystals from PtCu to PtCu₃via underpotential-deposition-like process and their electro-catalytic properties

Abstract

Octahedral Pt–Cu alloy nanocrystals with tunable composition from PtCu to PtCu3 was successfully synthesized via UPD-like process.

Ultrathin‐Carbon‐Layer‐Protected PtCu Nanoparticles Encapsulated in Carbon Capsules: A Structure Engineering of the Anode Electrocatalyst for Direct Formic Acid Fuel Cells

“…It is known that the reaction pathway of FAOR is closely related to the antipoisoning ability of the electrocatalyst . To further investigate the antipoisoning ability of the electrocatalysts, the ratio of the forward oxidation current peak ( j f ) to the reverse current peak ( j b ), that is j f / j b , was calculated to reveal the poison species tolerance ability, where a higher j f / j b value exhibits a better tolerance ability . We can obviously observe that j f / j b values of both the PtCu alloy electrocatalysts are much higher than that of commercial Pt/C, where the order of the j f / j b is Pt/C < PtCu/C < PtCu@NCC.…”

The facile synthesis of core–shell PtCu nanoparticles with superior electrocatalytic activity and stability in the hydrogen evolution reaction

“…To solve the above problems, many strategies have been adopted, which can be generally divided into two main approaches: (1) maximizing the efficiency of Pt via exposing all the Pt atoms or creating abundant defects; 20 and (2) alloying Pt with other non-noble metals to reduce the dosage of Pt. 21 Meanwhile, several comprehensive methods have been employed for the preparation of Pt-based electrocatalysts, including chemical vapor deposition (CVD), 22 electrochemical deposition, 23 and templating methods. 24 Among the Pt metal alloys, the PtCu alloy is considered to be an ideal substitute due to its compatibility with Pt, high electrochemical stability, and the low cost of Cu.…”

Facile synthesis of ternary PtPdCu alloy hexapods as highly efficient electrocatalysts for methanol oxidation

“…24 In addition to composition optimization, controlling the structures and morphologies of Pt-based nanocrystal provides an alternative promising method to improve the catalytic properties. [25][26][27] To this end, we reported the synthesis of Ru-decorated Pt cubes and icosahedra, in which the icosahedra exposed by {111} facets exhibited the superior catalytic activity for MOR relative to the cubes enclosed with {100} facets. 28 Compared to monometallic and bimetallic nanocrystals, nanocrystals consisting of multimetallic components provide an extra adjustability of the composition and/or structure, and thus the optimal control over their catalytic properties.…”