Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.electacta.2011.01.035
Title: In situ grown carbon nanotubes on carbon paper as integrated gas diffusion and catalyst layer for proton exchange membrane fuel cells
Authors: Tang, Z. 
Poh, C.K.
Tian, Z.
Lin, J.
Ng, H.Y.
Chua, D.H.C. 
Keywords: Carbon nanotube
Catalyst layer
Gas diffusion layer
Platinum
Proton exchange membrane fuel cell
Issue Date: 15-Apr-2011
Citation: Tang, Z., Poh, C.K., Tian, Z., Lin, J., Ng, H.Y., Chua, D.H.C. (2011-04-15). In situ grown carbon nanotubes on carbon paper as integrated gas diffusion and catalyst layer for proton exchange membrane fuel cells. Electrochimica Acta 56 (11) : 4327-4334. ScholarBank@NUS Repository. https://doi.org/10.1016/j.electacta.2011.01.035
Abstract: In situ grown carbon nanotubes (CNTs) on carbon paper as an integrated gas diffusion layer (GDL) and catalyst layer (CL) were developed for proton exchange membrane fuel cell (PEMFC) applications. The effect of their structure and morphology on cell performance was investigated under real PEMFC conditions. The in situ grown CNT layers on carbon paper showed a tunable structure under different growth processes. Scanning electron microscopy (SEM) and Brunauer-Emmett-Teller (BET) demonstrated that the CNT layers are able to provide extremely high surface area and porosity to serve as both the GDL and the CL simultaneously. This in situ grown CNT support layer can provide enhanced Pt utilization compared with the carbon black and free-standing CNT support layers. An optimum maximum power density of 670 mW cm-2 was obtained from the CNT layer grown under 20 cm3 min-1 C 2H4 flow with 0.04 mg cm-2 Pt sputter-deposited at the cathode. Furthermore, electrochemical impedance spectroscopy (EIS) results confirmed that the in situ grown CNT layer can provide both enhanced charge transfer and mass transport properties for the Pt/CNT-based electrode as an integrated GDL and CL, in comparison with previously reported Pt/CNT-based electrodes with a VXC72R-based GDL and a Pt/CNT-based CL. Therefore, this in situ grown CNT layer shows a great potential for the improvement of electrode structure and configuration for PEMFC applications. © 2011 Elsevier Ltd. All rights reserved.
Source Title: Electrochimica Acta
URI: http://scholarbank.nus.edu.sg/handle/10635/86445
ISSN: 00134686
DOI: 10.1016/j.electacta.2011.01.035
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