Soft Template‐Directed Reactions: One‐Pot Synthetic Route for Bimetallic Core–Satellite–Shell Structured Electrocatalytic Nanospheres

Abstract

A one‐pot synthesis strategy, which retards nanoparticle (NP) agglomeration in the initiation of reaction and prevents the combination of the core and small species, is reported. In the present study, we synthesize bimetallic core–shell structures of single Au cores and satellites‐like Pt NPs. The core was generated by using HAuCl4; thus, providing the unique conductive ability for electrons. The entire evolution process of Pt NPs during the whole reaction was confined within the SiO2 nanospheres. Through strong electrostatic attraction, the Pt NPs in a tight H3O+ packing accordingly increased the adsorbed hydrogen (Had) rate. The comparative investigation of electrocatalytic activities of the products and commercial Pt/C‐20 % in the hydrogen evolution reaction (HER) revealed that the Au@SiO2‐Pt, with a strong metal interaction effect in the electrolyte, exhibits a low Tafel slope of 52 mV dec−1, with its catalytic activity being maintained for at least 10 h. Impressively, it also demonstrates a high turnover frequency (TOF) value of 0.11 s−1.

Ultrathin core–shell–satellite structured Au@PtPd@Pt nanowires for superior electrocatalytic hydrogen evolution

“…65-2870). 31 Subsequently, the Au NWs serve as a hard template and core for the reaction with PdCl 2 and H 2 PtCl 6 , which act as metal precursors for the shell, resulting in the fabrication of Au@PtPd@Pt NWs through reduction with ascorbic acid (AA) in the subsequent step. The metal-stable properties of Au NWs make them suitable templates for the in situ growth of PtPd alloy layers on their surface, while the ultrathin 1D nanostructure imparts the acquired Au@PtPd@Pt sample with the same structural and morphological characteristics as the Au NWs.…”