Preparation of Pt–Ru@Polypyrrole-MWNT Catalysts by <i>γ</i>-Irradiation and Chemical Reduction and Their Adsorption Capacity for CO

Bae, Hyoung-Bong; Oh, Sangsuk; Woo, Jin-Chun; Choi, Seong‐Ho

doi:10.1166/jnn.2010.2981

Cited by 10 publications

(2 citation statements)

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“…2a. By irradiating water, a number of strong reducers, including H, e aq -and H 2 , are generated, and metal precursor is reduced rapidly [35]. The scheme of the photosynthesis process is shown in Fig.…”

Section: X-ray Photosynthesismentioning

confidence: 99%

Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts

Chiou¹,

Chung²,

Lin³

et al. 2017

JMSE-A

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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 NaBH 4 . 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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Section: X-ray Photosynthesismentioning

confidence: 99%

Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts

Chiou¹,

Chung²,

Lin³

et al. 2017

JMSE-A

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“…Pt-Ru at poly(pyrrole)-MWNT catalysts obtained high catalytic efficiency for CO stripping and methanol oxidation. The surface of MWNTs was then coated using conductive polymers such as aniline, pyrrole, and thiophene to go from hydrophobic properties to hydrophilic properties [9]. Finally, the metallic nanoparticles were deposited on conducting polymer-wrapped MWNTs.…”

Section: Introductionmentioning

confidence: 99%

Radiolytic Synthesis of Pt-Ru Catalysts Based on Functional Polymer-Grafted MWNT and Their Catalytic Efficiency for CO and MeOH

Yang

Sim

Kwen

et al. 2011

Journal of Nanomaterials

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Pt-Ru catalysts based on functional polymer-grafted MWNT (Pt-Ru@FP-MWNT) were prepared by radiolytic deposition of Pt-Ru nanoparticles on functional polymer-grafted multiwalled carbon nanotube (FP-MWNT). Three different types of functional polymers, poly(acrylic acid) (PAAc), poly(methacrylic acid) (PMAc), and poly(vinylphenyl boronic acid) (PVPBAc), were grafted on the MWNT surface by radiation-induced graft polymerization (RIGP). Then, Pt-Ru nanoparticles were deposited onto the FP-MWNT supports by the reduction of metal ions usingγ-irradiation to obtain Pt-Ru@FP-MWNT catalysts. The Pt-Ru@FP-MWNT catalysts were then characterized by XRD, XPS, TEM ,and elemental analysis. The catalytic efficiency of Pt-Ru@FP-MWNT catalyst was examined for CO stripping and MeOH oxidation for use in a direct methanol fuel cell (DMFC). The Pt-Ru@PVPBAc-MWNT catalyst shows enhanced activity for electro-oxidation of CO and MeOH oxidation over that of the commercial E-TEK catalyst.

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Precisely Controlled Synthesis of Metal Nanoparticles under Microwave Irradiation

Chen

Mochizuki

Wada

2013

Microwaves in Nanoparticle Synthesis

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Preparation of Pt–Ru@Polypyrrole-MWNT Catalysts by γ-Irradiation and Chemical Reduction and Their Adsorption Capacity for CO

Cited by 10 publications

References 0 publications

Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts

Synthesis and Characterization of PANI-MWCNTs Supported Nano Hybrid Electrocatalysts

Radiolytic Synthesis of Pt-Ru Catalysts Based on Functional Polymer-Grafted MWNT and Their Catalytic Efficiency for CO and MeOH

Precisely Controlled Synthesis of Metal Nanoparticles under Microwave Irradiation

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