Ultra-fine Pt nanoparticles on graphene aerogel as a porous electrode with high stability for microfluidic methanol fuel

被引：71

作者：

Kwok, Y. H. ^{[1
]}

Tsang, Alpha C. H. ^{[1
]}

Wang, Yifei ^{[1
]}

Leung, Dennis Y. C. ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Mech Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2017年 / 349卷

关键词：

Flow through microfluidic fuel cell; Platinum nanoparticle; Graphene aerogel; Porous electrode; PLATINUM NANOPARTICLES; LAMINAR-FLOW; CELL STACK; OXIDE; PERFORMANCE; OXIDATION; ELECTROOXIDATION; NANOCOMPOSITES; CATALYST; SHEETS;

D O I：

10.1016/j.jpowsour.2017.03.030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Platinum-decorated graphene aerogel as a porous electrode for flow-through direct methanol micro fluidic fuel cell is introduced. Ultra-fine platinum nanoparticles with size ranged from diameter 1.5 nm-3 nm are evenly anchored on the graphene nanosheets without agglomeration. The electrode is characterized by scanning electron microscopy, transmission electron microscopy and energy-dispersive X-ray spectroscopy. Catalytic activity is confirmed by cyclic voltammetry. The electroactive surface area and catalytic activity of platinum on graphene oxide (Pt/GO) are much larger than commercial platinum on carbon black (Pt/C). A counterflow microfluidic fuel cell is designed for contrasting the cell performance between flow-over type and flow-through type electrodes using Pt/C on carbon paper and Pt/GO, respectively. The Pt/GO electrode shows 358% increment in specific power compared with Pt/C anode. Apart from catalytic activity, the effect of porous electrode conductivity to cell performance is also studied. The conductivity of the porous electrode should be further enhanced to achieve higher cell performance. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：75 / 83

页数：9

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