Micelle-Assisted Strategy for the Direct Synthesis of Large-Sized Mesoporous Platinum Catalysts by Vapor Infiltration of a Reducing Agent

Overview

Journal Nanomaterials (Basel)

Date 2018 Oct 19

PMID 30332819

Authors

Yunqi Li

Yuwei Liu

Yusuke Yamauchi

Yusuf Valentino Kaneti

Saad M Alsheri

Tansir Ahamad

Norah Alhokbany

Jeonghun Kim

Katsuhiko Ariga

Ning Wu

Jun Xu

Affiliations

Soon will be listed here.

Abstract

Stable polymeric micelles have been demonstrated to serve as suitable templates for creating mesoporous metals. Herein, we report the utilization of a core-shell-corona type triblock copolymer of poly(styrene--2-vinylpyridine--ethylene oxide) and H₂PtCl₆·H₂O to synthesize large-sized mesoporous Pt particles. After formation of micelles with metal ions, the reduction process has been carried out by vapor infiltration of a reducing agent, 4-(Dimethylamino)benzaldehyde. Following the removal of the pore-directing agent under the optimized temperature, mesoporous Pt particles with an average pore size of 15 nm and surface area of 12.6 m²·g are achieved. More importantly, the resulting mesoporous Pt particles exhibit superior electrocatalytic activity compared to commercially available Pt black.

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