树枝状聚合物包裹的铂纳米粒子修饰玻碳电极上的电催化氧还原

Electrocatalytic O2 reduction at glassy carbon electrodes modified with dendrimer-encapsulated Pt nanoparticles.

作者信息

Ye Heechang, Crooks Richard M

机构信息

Department of Chemistry, Texas A&M University, P.O. Box 30012, College Station, TX 77842-3012, USA.

出版信息

J Am Chem Soc. 2005 Apr 6;127(13):4930-4. doi: 10.1021/ja0435900.

DOI:10.1021/ja0435900

PMID:15796558

Abstract

Platinum dendrimer-encapsulated nanoparticles (DENs) were prepared within fourth-generation, hydroxyl-terminated, poly(amidoamine) dendrimers and immobilized on glassy carbon electrodes using an electrochemical coupling strategy. X-ray photoelectron spectroscopy, electron microscopy, and electrochemical experiments confirmed that the Pt DENs were about 1.4 nm in diameter and that they remained within the dendrimer following surface immobilization. The resulting Pt DEN films were electrocatalytically active for the oxygen reduction reaction. The films were also robust, surviving up to 50 consecutive cyclic voltammograms and sonication.

摘要

铂树枝状大分子包裹的纳米颗粒（DENs）在第四代、羟基封端的聚（酰胺胺）树枝状大分子中制备，并使用电化学偶联策略固定在玻碳电极上。X射线光电子能谱、电子显微镜和电化学实验证实，铂DENs的直径约为1.4纳米，并且在表面固定后它们仍保留在树枝状大分子内。所得的铂DEN薄膜对氧还原反应具有电催化活性。这些薄膜也很坚固，能经受多达50次连续的循环伏安图和超声处理。