Ultrafast Microwave-Assisted Route to Surfactant-Free Ultrafine Pt Nanoparticles on Graphene: Synergistic Co-reduction Mechanism and High Catalytic Activity

被引:250
作者
Kundu, Paromita [1 ]
Nethravathi, C. [1 ]
Deshpande, Parag A. [2 ]
Rajamathi, M. [3 ]
Madras, Giridhar [2 ]
Ravishankar, N. [1 ]
机构
[1] Indian Inst Sci, Mat Res Ctr, Bangalore 560012, Karnataka, India
[2] Indian Inst Sci, Dept Chem Engn, Bangalore 560012, Karnataka, India
[3] St Josephs Coll, Dept Chem, Bangalore, Karnataka, India
关键词
microwave reduction; graphene; supported catalyst; ultrafine Pt; methanol oxidation; METHANOL OXIDATION; PLATINUM NANOPARTICLES; GRAPHITE OXIDE; ELECTROCATALYSTS; ENHANCEMENT; SUPPORT;
D O I
10.1021/cm200329a
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
We demonstrate an ultrafast method for the formation of, graphene supported Pt catalysts by the co-reduction of graphene oxide and Pt salt using ethylene glycol under microwave irradiation conditions. Detailed analysis of the mechanism of formation of the hybrids indicates a synergistic co-reduction mechanism whereby the presence of the Pt ions leads to a faster reduction of GO and the presence of the defect sites on the reduced GO serves as anchor points for the heterogeneous nucleation of Pt. The resulting hybrid consists of ultrafine nanoparticles of Pt uniformly distributed on the reduced GO susbtrate. We have shown that the hybrid exhibits good catalytic activity for methanol oxidation and hydrogen conversion reactions. The mechanism is general and applicable for the synthesis of other multifunctional hybrids based on graphene.
引用
收藏
页码:2772 / 2780
页数:9
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