Facile Synthesis of Ag@Pt Core-Shell Nanoparticles with Different Dendrites Pt Shells

Abstract

We presented a simple method for synthesis of various Ag@Pt nanoarchitectures via overgrowth of Pt shell structures in Ag cores by controlling the amount of Pt precursor. When the molar ratio of Ag‐to‐Pt precursor was 1: 3 and 1: 4, the Ag@Pt3 and Ag@Pt4 nanoparticles had a large number of Pt branches, which lead to a large electrochemically active specific surface area (45.5 m2/gPt, 59.05 m2/gPt, respectively). And compared with commercial Pt/C (323.9 mA/mgPt), Ag@Pt3 (381.1 mA.mgPt)and Ag@Pt4 (479.2 mA/mgPt) had a better catalytic effect inthe methanol oxidation reaction (MOR).

One-pot synthesis of CuPt nanodendrites with enhanced activity towards methanol oxidation reaction

“…Unlike polyhedral nanoparticles, nanodendrites have greater potential as catalysts due to their unique and anomalous structures, high surface-to-volume ratios, and rich edges and corners. 11 Some branched monometallic nanoparticles, such as Pt, [12][13][14][15][16] Pd, [17][18][19] Au, 20 and Ag, 21 have been achieved successfully. Controlled synthesis of branched Pt-based bimetallic nanocrystals, in particular CuPt nanodendrites, with tunable size and structure has demonstrated a great potential to advance their electrocatalytic performances toward methanol oxidation (MOR), oxygen reduction reaction (ORR), and so on.…”