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Hindi Research Article, J Nanomater Mol Nanotechnol Vol: 2 Issue: 7
Towards Methanol Electrooxidation: Comparative Study on Imidazolium and Guanidinium Ionic Liquids Supported Pt Nanocrystals on Carbon Nanotubes
| Shulian He1, Liping Ding1, Dechao Chen1, Yunjin Yao1, Wenhong Liu1, Lei Wan2, Jinzhang Xu2 and Shiding Miao1* | |
| 1School of Chemical Engineering, Hefei University of Technology (HFUT), Tunxi Road 193, Hefei 230009, P. R. China | |
| 2School of Electrical Engineering and Automation, HFUT, Tunxi Road 193, Hefei 230009, P. R. China | |
| Corresponding author : Dr. Shiding Miao School of Electrical Engineering and Automation, Hefei University of Technology, Tunxi Road 193, Hefei 230009, P. R. China Tel: 86-551-2901560; Fax: 86-551-2901450 E-mail: miaosd@iccas.ac.cn |
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| Received: August 28, 2013 Accepted: November 12, 2013 Published: November 16, 2013 | |
| Citation: He S, Ding L, Chen D, Yao Y, Liu W, et al. (2013) Towards Methanol Electro-oxidation: Comparative Study on Imidazolium and Guanidinium Ionic Liquids Supported Pt Nanocrystals on Carbon Nanotubes. J Nanomater Mol Nanotechnol 2:7 doi:10.4172/2324-8777.1000134 |
Abstract
Towards Methanol Electrooxidation: Comparative Study on Imidazolium and Guanidinium Ionic Liquids Supported Pt Nanocrystals on Carbon Nanotubes
In this work, two types of ionic liquids (ILs), 1-hexadecyl-3-methylimidazolium chloride (C16MIMCl) and 1,1,3,3-tetramethyl guanidinium bromide (TMGBr), were employed to assist the immobilization of Pt nanocrystals on carbon nanotubes (CNTs). It is found that the conjugated effects including the cations-π (C-N+•), π-π interactions and electrostatic interactions are the main drive forces between the quasi-aromatic imidazolium ring and pyrolytic graphite of CNTs in sample of C16MIM-CNTs-Pt. The interactions of intra-molecular hydrogen bonds (N+-H•••N) and electrostatic interactions are found in the guanidinium ILs assisted catalysts (TMG-CNTs-Pt). The conjugated effects induce the formation of Pt(II) complexes in the composites even after the platinum precursor (H2PtCl6•6H2O) was reduced by NaBH4. The catalysis investigation towards methanol oxidation carried out in acidic solution demonstrates that both ternary composite (C16MIM-CNTs- Pt and TMG-CNTs-Pt) catalysts exhibit higher electro-catalytic activity and better stability than the binary catalyst (CNTs-Pt) or the single-component catalyst (Pt nanocrystals).
