Ferritin-Templated Synthesis and Self-Assembly of Pt Nanoparticles on a Monolithic Porous Graphene Network for Electrocatalysis in Fuel Cells

被引：90

作者：

Qiu, Huajun ^{[1
]}

Dong, Xiaochen ^{[2
]}

Sana, Barindra ^{[1
]}

Peng, Tao ^{[1
]}

Paramelle, David ^{[3
]}

Chen, Peng ^{[1
]}

Lim, Sierin ^{[1
]}

机构：

[1] Nanyang Technol Univ, Sch Chem & Biomed Engn, Div Bioengn Sch, Singapore 637457, Singapore

[2] Nanjing Univ Technol, IAM, Nanjing 210009, Peoples R China

[3] ASTAR, Inst Mat Res & Engn, Singapore 117602, Singapore

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 03期

基金：

高等学校博士学科点专项科研基金;

关键词：

three-dimensional graphene; ferritin; protein nanocage; Pt electrocatalyst; fuel cells; INTERCONNECTED GRAPHENE; CARBON NANOTUBES; METHANOL; CATALYST; ELECTROOXIDATION; PERFORMANCE; DEPOSITION; OXIDATION; ELECTRODE; IRON;

D O I：

10.1021/am3022366

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The monolithic three-dimensional (3D) graphene network is used as the support for Pt nanoparticles (NPs) to fabricate an advanced 3D graphene-based electrocatalyst. Distinct from previous strategies, the monoclispersed Pt NPs with ultrafine particle size (similar to 3 nm) are synthesized using ferritin protein nanocages as the template and subsequently self-assembled on the 3D graphene by leveraging on the hydrophobic interaction between the ferritin and the graphene. Following the self-assembly, the ferritins are removed, resulting in a stable Pt NP/3D graphene composite. The composite exhibits much enhanced electrocatalytic activity for methanol oxidation as compared with both Pt NP/chemically reduced graphene oxide (Pt/r-GO) and state-of-the-art Pt/C catalyst. The observed electrocatalytic activity also shows marked improvement over Pt/3D graphene prepared by pulse electrodeposition of Pt. This study demonstrates that protein nanocage templating and assembly are promising strategies for the fabrication of functional composites in catalysis and fuel cell applications.

引用

页码：782 / 787

页数：6

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