From Pt-rich dendrites to Ni-rich cuboctahedrons: structural evolution and electrocatalytic property studies

Abstract

The composition and morphology evolution for PtxNi1−x (0 < x < 1) nanoalloys was achieved by adjusting the growth kinetics, which were found different under different temperatures. The structure-dependent electrocatalytic performance was evaluated with MOR as the model reaction.

Oxygen Reduction Reaction Catalyzed by Self-Assembled Monolayers of Copper-Based Electrocatalysts on a Polycrystalline Gold Surface

“…For example, platinum group metal (PGM) catalysts have been used as ORR electrocatalysts in the state-of-the-art PEFCs. Although extensive efforts have been paid to develop PGM-based electrocatalysts, [1][2][3][4][5][6][7][8][9][10] these catalysts still require an overpotential of >0.2 V.…”

“…For example, platinum-group metal (PGM) catalysts have been used as ORR electrocatalysts in state-of-the-art PEFCs. Although extensive efforts have been devoted to the development of PGM-based electrocatalysts, − these catalysts still require an overpotential of >0.2 V. Ideally we should develop ORR electrocatalysts with almost no overpotential to minimize the energy loss at the cathode. Furthermore, since PGMs are scarce and expensive, PGM catalysts should be replaced with earth-abundant catalysts for widespread applications of PEFCs.…”

The shape evolution from PtxCoy@Co cubes to PtxCoymulticubes for selective hydrogenation of α,β-unsaturated aldehyde

“…Predictable control of the heterogeneous nucleation of two alien metals anisotropic products is really challenging due to the difficulty in accessing structurally well-defined precursors. Pt-Ni nanocrystals with fantastic structures, such as polyhedrons, [1][2][3][4][5] nanocages, 6,7 core-shell, 8,9 and concave/ convex particles, 10,11 have been reported, and their excellent behavior for olefins hydrogenation and oxygen reduction reaction has drawn researchers interest. 4,12 However, few significant advances in the heterogeneous nucleation of Pt-Co nanocrystals is mentioned in the related literature, thus the scarcity of structural diversification of Pt-Co nanocrystals has precluded the wide development in catalytic research of Pt-Co bimetals.…”

One-pot synthesis of Pt hollow spheres and their performance on electrochemical catalysis

“…Of the many noble metals, platinum is well-known for its excellent catalytic properties and stability. Therefore, many Pt nanostructures have been fabricated for use in catalytic reactions, such as Pt core-shell nanostructures, 17 Pt dendritic nanostructures, 18 Pt nanoparticles, 19 and Pt nanowires. 20 Among these Pt nanostructures, Pt-based porous nanostructures have attracted great attention owing to their excellent catalytic properties, which result from their large specific surface area and good structural stability.…”