Electrospinning synthesis of porous carbon fiber supported Pt-SnO2 anode catalyst for direct ethanol fuel cell

Wang, Xuhong; Hu, Xiuli; Huang, Jian; Zhang, Wenjun; Ji, Wangjin; Hui, Yang; Yao, Xiaxi

doi:10.1016/j.solidstatesciences.2019.05.018

Cited by 27 publications

(7 citation statements)

References 27 publications

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“…Increasing the porosity and specific surface area of fibers can be accomplished with improving the performance of absorption, catalysis, sensors, and so on. Therefore, porous fibers have presented extensive use in a wide variety of applications …”

Section: Secondary Surface Morphologies Of Electrospun Nanofibersmentioning

confidence: 99%

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

2020

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Engineering the secondary surface morphology of fibers (fibers without smooth surface and solid interior) has been attracting significant awareness in various areas and applications. Among different methods of forming nanofibers, electrospinning is the most widely adopted technique due to the ease of forming fibers with a broad range of properties and its unique advantages such as the flexibility to spin into a variety of shapes and sizes as well as adjustable porosity of electrospun structures. In this review paper, more emphasis is put on the secondary surface morphology. A comprehensive overview of the basic principles about the electrospinning process, types of electrospinning, materials, formation mechanisms, characterizations, and applications of electrospun fibers with the secondary surface morphology (e. g. the porous structure, grooved structure, wrinkled structure, rough structure, cactus structure, and hollow structure) are discussed in detail. Importantly, we believe our work can serve as guidelines for the preparations, characterizations, and applications of electrospun fibers with the secondary surface morphology.

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Section: Secondary Surface Morphologies Of Electrospun Nanofibersmentioning

confidence: 99%

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

2020

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“…Recently, the metal platinum (Pt)–oxide support interaction has been attracting much attention for maximization of activity on Pt/C in MEA. Both of anodic − and cathodic − electrocatalytic reactions on Pt-loaded CeO 2 , − ,− TiO 2 , − ,− SnO 2 , − ,− WO 3 , ,,, MoO 2 , …”

Section: Introductionmentioning

confidence: 99%

Active Pt-Nanocoated Layer with Pt–O–Ce Bonds on a CeO_x Nanowire Cathode Formed by Electron Beam Irradiation

et al. 2022

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A Pt-nanocoated layer (thickness of approx. 10–20 nm) with Pt–O–Ce bonds was created through the water radiolysis reaction on a CeO x nanowire (NW), which was induced by electron beam irradiation to the mixed suspension of K 2 PtCl 4 aqueous solution and the CeO x NW. In turn, when Pt-nanocoated CeO x NW/C (Pt/C ratio = 0.2) was used in the cathode layer of a membrane electrode assembly (MEA), both an improved fuel cell performance and stability were achieved. The fuel cell performance observed for the MEA using Pt-nanocoated CeO x NW/C with Pt–O–Ce bonds, which was prepared using the electron beam irradiation method, improved and maintained its performance (observed cell potential of approximately 0.8 V at 100 mW cm –2 ) from 30 to 140 h after the start of operation. In addition, the activation overpotential at 100 mA cm –2 (0.17 V) obtained for MEA using Pt-nanocoated CeO x NW/C was approximately half of the value at 100 mA cm –2 (0.35 V) of MEA using a standard Pt/C cathode. In contrast, the fuel cell performance (0.775 V at 100 mW cm –2 after 80 h of operation) of MEA using a nanosized Pt-loaded CeO x NW (Pt/C = 0.2), which was prepared using the conventional chemical reduction method, was lower than that of MEA using a Pt-nanocoated CeO x /C cathode and showed reduction after 80 h of operation. It is considered why the nanocoated layer having Pt–O–Ce bonds heterogeneously formed on the surface of the CeO x NW and the bare CeO 2 surface consisting of Ce 4+ cations would become unstable in an acidic atmosphere. Furthermore, when a conventional low-amount Pt/C cathode (Pt/C = 0.04) was used as the cathode layer of the MEA, its stable performance could not be measured after 80 h of operation as a result of flooding caused by a lowering of electrocatalytic activity on the Pt/C cathode in the MEA. In contrast, a low-amount Pt-nanocoated CeO x NW (Pt/C = 0.04) could maintain a low activation overpotential (0.22 V at 100 mA cm –2 ) of MEA at the same operation time. Our surface first-principles modeling indicates that the high quality and stable performance observed for the Pt-nanocoated CeO x NW cathode of MEA can be attributed to the formation of a homogeneous electric double layer on the sample. Since the MEA performance can be improved by examining a more effective method of electron beam irradiation to all surfaces of the sample, the present work result shows the usefulness of the electron beam irradiation method in preparing active surfaces. In addition, the quantum beam technology such as the electron beam irradiation method was sho...

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“…Similar with Ru, the contribution of Sn also has been said due to the bifunctional and ligand effect to promote the CO oxidation. On the other hand, addition of support material also has been proven can improve the electrochemical performance 15 of the anode catalyst especially in terms of stability and durability of the catalyst. 16 There are two types of conventional fuel feeding systems for DEFCs: passive and active.…”

Section: Introductionmentioning

confidence: 99%

Design and simulation for improved performance via pump‐less direct ethanol fuel cell for mobile application

Fadzillah

Kamarudin

Zainoodin

2022

Intl J of Energy Research

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The advancement of direct ethanol fuel cells (DEFCs) as portable power sources demonstrated a significant challenge since the power output is still far from the acceptable standards, mainly due to the slow kinetics of the ethanol oxidation reaction (EOR) via the passive mode. While the active system presented higher power output but ends up with a bulky system including all the external mechanical devices. Thus, this work proposed a pump-less DEFC to replace the conventional passive and active DEFC systems to achieve both power generation and device portability. The electrochemical results showed that pump-less DEFCs generated comparable power output with active-feed DEFCs. Computational fluid dynamic (CFD) simulations of the anode flow field for pump-less DEFCs were carried out using three types of flow field designs with different fuel outlet directions. The results indicated that a winding outlet (L-shaped) channel produced the lowest fuel discharge velocity as a result of a high static pressure drop along the channel.

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Electrospinning synthesis of porous carbon fiber supported Pt-SnO2 anode catalyst for direct ethanol fuel cell

Cited by 27 publications

References 27 publications

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

Active Pt-Nanocoated Layer with Pt–O–Ce Bonds on a CeO_x Nanowire Cathode Formed by Electron Beam Irradiation

Design and simulation for improved performance via pump‐less direct ethanol fuel cell for mobile application

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Electrospinning synthesis of porous carbon fiber supported Pt-SnO2 anode catalyst for direct ethanol fuel cell

Cited by 27 publications

References 27 publications

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

A Review on the Secondary Surface Morphology of Electrospun Nanofibers: Formation Mechanisms, Characterizations, and Applications

Active Pt-Nanocoated Layer with Pt–O–Ce Bonds on a CeOx Nanowire Cathode Formed by Electron Beam Irradiation

Design and simulation for improved performance via pump‐less direct ethanol fuel cell for mobile application

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Active Pt-Nanocoated Layer with Pt–O–Ce Bonds on a CeO_x Nanowire Cathode Formed by Electron Beam Irradiation