Use of carbon nanocoil as a catalyst support in direct methanol fuel cell

Suda, Yoshiyuki; Kaida, Shota; Ozaki, Masahiro; Shimizu, Yoshiaki; Okabe, Yuta; Tanoue, Hideto; Takikawa, Hirofumi; Ue, Hitoshi; Shimizu, Kazuki

doi:10.1063/1.4866623

Cited by 5 publications

(4 citation statements)

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“…17,18,20 In our previous study, we analyzed the use of carbon nanocoils (CNCs) as a catalyst support in DMFC. 21 Due to their threedimensional structure, CNC is considered to be a unique support material for electrocatalyst materials. By using CNCs in the DMFC cathode, the diffusion of fuel and gas, and the removal of reaction products became considerably smoother.…”

Section: Introductionmentioning

confidence: 99%

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

et al. 2015

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The application of a microporous layer (MPL) between the gas diffusion layer and the catalyst layer (CL) plays a crucial role in the performance of the direct methanol fuel cell (DMFC). To this end, this study investigates the effects of carbon loading and the nature of the carbon material used in the anode MPL on the performance of DMFC using transmission and scanning electron microscopy, polarization technique, and electrochemical impedance spectroscopy (EIS). DMFC was indigenously fabricated using 30 wt% PtRu catalyst supported on carbon nanocoil and commercial Pt catalyst as the anode CL and the cathode CL, respectively. Carbon nanoballoon (CNB) and Vulcan XC-72R (Vulcan) were used as the anode MPL. According to polarization studies, a membrane electrode assembly (MEA) with CNB and Vulcan MPLs (loading of 1.5 mg cm −2 ) shows higher power density. This is 1.3 and 1.8 times higher than that without the anode MPL when methanol concentration was 0.5 M (M = mol dm −3 ), respectively. Electrochemical impedance spectra (EIS) results indicate that the MEAs with the anode MPLs have lower highfrequency resistance and charge transfer resistance when compared to those without the anode MPL. Thus, it can be realized that the anode MPL plays a significant role in the effective utilization of CNC-supported PtRu anode catalyst, thereby improving DMFC performance.

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Section: Introductionmentioning

confidence: 99%

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

et al. 2015

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“…PtRu nanoparticle coated t-SHCFs as anode in direct methanol fuel cells showed higher current than other carbon nanonarticles (Vulcan and Arc-Black) coated with PtRu nanoparticles. Moreover, the power density of Pt nanoparticle coated t-SHCFs as cathode was 1.2 times higher than that of Pt nanoparticle coated Vulcan and 1.6 times higher than that of Pt nanoparticle coated Arc-Black [72].…”

Section: Supercapacitor and Fuel Cellmentioning

confidence: 92%

“…Specific capacitances of polyaniline coated CNCs and polypyrrole coated CNCs were 360 and 202 F/g, respectively [70]. Nitze et al [71] and Suda et al [72] reported that CNCs efficiently work as a catalyst support for fuel cell anode and cathode [71,72]. Pd nanoparticle coated b-TCFs as anode in formic acid fuel cells could generate 300 mA/mg of Pd at room temperature and showed higher power density than Pd nanoparticle coated MWCNTs [71].…”

Section: Supercapacitor and Fuel Cellmentioning

confidence: 99%

Growth and Properties of Carbon Microcoils and Nanocoils

2014

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Abstract:Various types of coiled carbon filaments have been synthesized using chemical vapor deposition and other methods. These carbon filaments exhibit unique electrical and mechanical properties due to their versatile shapes and structures. To form coiled shapes, different types of catalyst compositions and reactive gases have been explored. Generally, coiled carbon filaments are classified by coil diameter and shape (e.g., microcoil and nanocoil). In this review, coiled carbon filaments are classified into three growth mechanism categories: (1) bidirectional double helical growth; (2) bidirectional twisted growth; and (3) tip single helical or twisted growth. Next, their synthesis methods and hypothetical growth mechanisms are discussed. Then, their electrical and mechanical properties are listed. Finally, potential applications and uses of coiled carbon filament are mentioned.

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“…They are also used in nanosprings [26][27][28][29][30], electrode materials in fuel cells [31][32][33][34], field emitters [35][36][37], magnetic sensors [38,39], and various industrial fields [40][41][42].…”

Section: Catalystmentioning

confidence: 99%

High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst

et al. 2015

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Carbon nanocoil (CNC), which is synthesized by a catalytic chemical vapor deposition (CCVD) method, has a coil diameter of 300-900 nm and a length of several tens of μm. Although it is very small, CNC is predicted to have a high mechanical strength and hence is expected to have a use in nanodevices such as electromagnetic wave absorbers and field emitters. For nanodevice applications, it is necessary to synthesize CNC in high yield and purity. In this study, we improved the conditions of catalytic layer formation and CCVD. Using optimized CVD conditions, a CNC layer with a thickness of >40 μm was grown from a SnO2/Fe2O3/SnO2 catalyst on a substrate, and its purity increased to 81% ± 2%.

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Use of carbon nanocoil as a catalyst support in direct methanol fuel cell

Cited by 5 publications

References 0 publications

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

Effective Utilization of Carbon Nanocoil-supported PtRu Anode Catalyst by Applying Anode Microporous Layer for Improved Direct Methanol Fuel Cell Performance

Growth and Properties of Carbon Microcoils and Nanocoils

High-Yield Synthesis of Helical Carbon Nanofibers Using Iron Oxide Fine Powder as a Catalyst

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