Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts

Yuh Jing Chiou, Meng-Yuan Chung, Hong Ming Lin, Hsing-Yang Liu, Andrzej Borodzinski, Leszek Stobinski, C.K. Lin, Krzysztof Ryszard Kupiec

Research output: Contribution to journalArticle

Abstract

Among new energy systems, fuel cells are electrochemical devices transforming chemical energy directly into electrical energy. In our previous works, MWCNTs (the multi walled carbon nanotubes) supported palladium anodic electrocatalysts for DFAFCs (direct formic acid fuel cells) have been studied. MWCNTs can be modified by appropriate oxides, for example, cerium oxide, zirconium oxide and N-doped titanium dioxide, to enhance the electrocatalytic performance of the catalysts. But the oxides and the defects of the acid oxidized MWCNTs, denoted as AO-MWCNTs, can cause the electron capture and reduce both the catalyst conductivity and the catalysts activity. In order to improve the conductive properties of the support, in the present work a conductive polymer was introduced to modify the surface of carbon nanotubes. PANI (polyaniline) has a long-chain structure and conjugated structure and exhibits good conductivity, high stability, and is non-toxic. After PANI modification, AO-MWCNTs can provide efficient electronic conduction network. In this study, PANI modified AO-MWCNTs were prepared via polymerization process. AO-MWCNTs were homogeneously coated with PANI to obtain composite with weight ratio 50:50 PANI to MWCNTs. The thickness of the PANI layer was 4-9 nm. It was shown that the photosynthesis process is a better method to reduce Pd on PANI/AO-MWCNTs than by using NaBH4. By adjusting pH value to 9, during preparation of Pd/PANI/AO-MWCNTs composites by X-ray irradiation process, smaller Pd particles were obtained and PANI deprotonation was avoided which explains better activity of this composite in formic acid electro oxidation.
Original languageEnglish
Pages (from-to)1-8
JournalJournal of Material Sciences and Engineering
Publication statusPublished - 2017

Fingerprint

Carbon Nanotubes
Electrocatalysts
formic acid
Composite materials
polyaniline
Formic acid fuel cells (FAFC)
Deprotonation
Catalysts
Photosynthesis
Electrooxidation
Palladium
Oxides
Fuel cells
Catalyst activity
Polymers
Polymerization
Irradiation

Cite this

Chiou, Y. J., Chung, M-Y., Lin, H. M., Liu, H-Y., Borodzinski, A., Stobinski, L., ... Krzysztof Ryszard Kupiec (2017). Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts. Journal of Material Sciences and Engineering, 1-8.

Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts. / Chiou, Yuh Jing; Chung, Meng-Yuan; Lin, Hong Ming; Liu, Hsing-Yang; Borodzinski, Andrzej; Stobinski, Leszek; Lin, C.K. ; Krzysztof Ryszard Kupiec.

In: Journal of Material Sciences and Engineering, 2017, p. 1-8.

Research output: Contribution to journalArticle

Chiou, YJ, Chung, M-Y, Lin, HM, Liu, H-Y, Borodzinski, A, Stobinski, L, Lin, CK & Krzysztof Ryszard Kupiec 2017, 'Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts', Journal of Material Sciences and Engineering, pp. 1-8.
Chiou, Yuh Jing ; Chung, Meng-Yuan ; Lin, Hong Ming ; Liu, Hsing-Yang ; Borodzinski, Andrzej ; Stobinski, Leszek ; Lin, C.K. ; Krzysztof Ryszard Kupiec. / Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts. In: Journal of Material Sciences and Engineering. 2017 ; pp. 1-8.
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AU - Borodzinski, Andrzej

AU - Stobinski, Leszek

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AB - Among new energy systems, fuel cells are electrochemical devices transforming chemical energy directly into electrical energy. In our previous works, MWCNTs (the multi walled carbon nanotubes) supported palladium anodic electrocatalysts for DFAFCs (direct formic acid fuel cells) have been studied. MWCNTs can be modified by appropriate oxides, for example, cerium oxide, zirconium oxide and N-doped titanium dioxide, to enhance the electrocatalytic performance of the catalysts. But the oxides and the defects of the acid oxidized MWCNTs, denoted as AO-MWCNTs, can cause the electron capture and reduce both the catalyst conductivity and the catalysts activity. In order to improve the conductive properties of the support, in the present work a conductive polymer was introduced to modify the surface of carbon nanotubes. PANI (polyaniline) has a long-chain structure and conjugated structure and exhibits good conductivity, high stability, and is non-toxic. After PANI modification, AO-MWCNTs can provide efficient electronic conduction network. In this study, PANI modified AO-MWCNTs were prepared via polymerization process. AO-MWCNTs were homogeneously coated with PANI to obtain composite with weight ratio 50:50 PANI to MWCNTs. The thickness of the PANI layer was 4-9 nm. It was shown that the photosynthesis process is a better method to reduce Pd on PANI/AO-MWCNTs than by using NaBH4. By adjusting pH value to 9, during preparation of Pd/PANI/AO-MWCNTs composites by X-ray irradiation process, smaller Pd particles were obtained and PANI deprotonation was avoided which explains better activity of this composite in formic acid electro oxidation.

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