Conducting carbon/polymer composites as a catalyst support for proton exchange membrane fuel cells

Memioğlu, Fulya; Bayrakçeken, Ayşe; Öznülüer, Tuba; Ak, Metin

doi:10.1002/er.3126

Cited by 25 publications

(18 citation statements)

References 31 publications

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“…The PEM fuel cell polarization curves and the corresponding power density curves of all catalysts are shown in Figure ; to provide a balance between cell efficiency and power output, the performances of the catalysts were mostly evaluated at a cell voltage of 0.6 V at which the measured current and power densities are affected by the ORR activity of the metal catalyst. PEM fuel‐cell performance for PEDOT/C supported catalyst in our previous study was worse than that reported in this study. The reason for this may be explained by the modification of the humidifier of the system used in our fuel‐cell test station, which was modified by taking the filling material out of the humidifier.…”

Section: Resultscontrasting

confidence: 94%

“…The XRD pattern of Pt:PEDOT/C catalysts shows characteristic sharp peaks at 2 θ ≈39.8, 46.6, 67.5, and 81.5°corresponding to the (1 1 1), (2 0 0), (2 2 0), and (3 1 1) lattice planes of Pt, respectively, confirming the presence of Pt in the face‐centered cubic (FCC) structure. The peak at 2 θ ≈26° corresponds to PEDOT and C, which is overlapped . The average sizes of the Pt particles were determined by using the Scherrer equation after curve fitting and background subractions and by using peak broadening of Pt (2 2 0), which is not affected by carbon overlapping, and are listed in Table .…”

Section: Resultsmentioning

confidence: 99%

“…Ammonium persulfate (APS, Sigma Aldrich) and p ‐toluene sulfonic acid ( p ‐TSA, Sigma Aldrich) were used as the oxidant and dopant, respectively, to increase the electrical conductivity of the composites. Details of the synthesis procedure can be found in our recent report . When preparing composites, the carbon amount was varied between 5 and 35 % to investigate the effect of PEDOT amount on support.…”

Section: Methodsmentioning

confidence: 99%

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PEDOT/C Composites used as a Proton Exchange Membrane Fuel Cell Catalyst Support: Role of Carbon Amount

Daş

Yurtcan

2017

Energy Tech

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Carbon‐based support materials are mostly used in proton exchange membrane fuel cells (PEMFCs); however, they often suffer from degradation under the operating conditions. In this context, conducting polymers and their composites stand out as a good alternative support material thanks to their chemical stability, high electrical conductivity, and higher oxidation‐resistant properties, which fulfills the requirements for possible utilization as electrocatalyst in PEMFCs. This study reports the preparation of poly(3,4‐ethylenedioxythiophene)/carbon (PEDOT/C) composite‐supported Pt nanoparticles for PEMFC electrodes. First, PEDOT/C composites were prepared using different carbon amounts by in situ chemical oxidative polymerization of EDOT monomer on carbon particles. Then, Pt nanoparticles (about 20 % loading) were obtained by using a microwave irradiation technique as it is fast, inexpensive, energy and time saving, and ecofriendly. The successful synthesis was confirmed by XRD, TEM, and thermogravimetric analysis investigations. The surface area and pore structure of the PEDOT/C supports was also investigated by using the BET technique. The ex situ and in situ electrochemical analyses were performed by using cyclic voltammetry and PEMFC performance tests. The obtained results for the fuel cell open the way for the use of PEDOT/C composite support materials as electrocatalysts for fuel cells.

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Section: Resultscontrasting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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PEDOT/C Composites used as a Proton Exchange Membrane Fuel Cell Catalyst Support: Role of Carbon Amount

Daş

Yurtcan

2017

Energy Tech

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“…Figure shows the X‐ray diffravtion (XRD) patterns of the as‐prepared Fe x NC‐T‐2 samples with different pyrolysis temperature and different Fe content. For the samples obtained at relatively lower temperatures such as 600°C and 700°C, only one broad diffraction peak corresponding to the (002) crystal plane of graphite carbon was detected . This peak shifted from 28.0° to 26.4° when the pyrolysis temperature increased from 600°C to 700°C, suggesting that the layer spacing of carbon is increased after N doping under relatively high temperature.…”

Section: Resultsmentioning

confidence: 95%

Iron and nitrogen codoped carbon catalyst with excellent stability and methanol tolerance for oxygen reduction reaction

Liu

et al. 2019

Int J Energy Res

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Summary A series of non‐precious metal FexNC electrocatalysts for oxygen reduction reaction (ORR) were successfully synthesized using Fe(NO3)3, glucose, and melamine as the Fe, C, and N sources, respectively. The effects of the pyrolysis temperature and Fe/N contents on the catalytic performances are comprehensively investigated. Electrochemical results reveal that among the FexNC catalysts, Fe1.5NC‐900‐2 pyrolyzed at 900°C with the mass ratio of FeC to melamine being 1:10 proves the highest catalytic performance. The half‐wave potential (E1/2) of ORR was 821 mV (vs reversible hydrogen electrode (RHE)) and only 36 mV lower than that on commercial Pt/C catalyst (857 mV). More importantly, Fe1.5NC‐900‐2 catalyst shows excellent stability and methanol tolerance. After 1000 sequential cycles, the E1/2 on Pt/C catalyst shifts negatively by approximately 60 mV, while for Fe1.5NC‐900‐2 catalyst, this shift is only 28 mV although the number of sequential cycles is increased to 8000. In the presence of methanol, the current decay in the chronoamperometric response at 1000 seconds is only 8% and also much lower than that on Pt/C catalyst (46%). The high catalytic performances arise from the abundant Fe3N active sites embedded in the carbon matrix of the FexNC catalysts. These findings can be used to discuss the catalytic mechanism of ORR on the FexNC catalysts and design the nonprecious metal carbon‐based electrocatalysts for ORR.

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“…The carbon structure has a strong influence on the anchoring effect of metal and auxiliary atoms on its surface, which is crucial in providing fixed reaction sites for the reactants . Various types of carbons, such as carbon black, multiwall carbon nanotubes (MWCNTs), activated carbon, C/polymer composite, and graphene, have been identified as key potential catalyst support materials in fuel cells. The use of carbon nanostructures was shown to significantly increase the current density, durability, and stability of the electrode due to the increase in the specific surface area and a strong anchoring effect.…”

Section: Introductionmentioning

confidence: 99%

Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

et al. 2019

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Summary Reduced graphene oxide (RGO) has progressed as one of key emerging carbon for catalyst support material. As an alternative to the conventional RGO precursor, biomass Sengon wood was converted into RGO for use as a noble metal free catalyst support in oxygen reduction reaction (ORR). This work intends to reveal the applicability of Sengon wood‐derived RGO in anchoring/doping iron and nitrogen particles onto its surface and to study its ORR performance in a half‐cell environment. Thin‐sheet layer and highly defective (ID/IG) was gradually obtained at elevated pyrolysis temperature of Sengon wood graphene oxide (GO) at range 700°C to 900°C. As prepared RGO was further doped into catalyst (Fe/N/RGO) through the same pyrolysis procedure at a selected temperature after mixing the GO powder with iron chloride and different nitrogen precursors (urea, choline chloride, and polyaniline) at a fixed ratio. The ORR activity reached a current density up to 2.43 mA/cm2, which in conjunction with smooth multilayer sheet morphology and high graphitic‐N content as the active sites. Stability analysis indicated an 85% current efficiency and only 0.03 V reduction in onset potential on methanol resistant test for Fe/ChoCl/RGO catalyst. This study revealed that Sengon wood‐derived RGO successfully supported Fe‐N‐C catalyst which showed comparable oxygen reduction activity to Pt/C.

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Conducting carbon/polymer composites as a catalyst support for proton exchange membrane fuel cells

Cited by 25 publications

References 31 publications

PEDOT/C Composites used as a Proton Exchange Membrane Fuel Cell Catalyst Support: Role of Carbon Amount

PEDOT/C Composites used as a Proton Exchange Membrane Fuel Cell Catalyst Support: Role of Carbon Amount

Iron and nitrogen codoped carbon catalyst with excellent stability and methanol tolerance for oxygen reduction reaction

Noble‐free oxygen reduction reaction catalyst supported on Sengon wood ( Paraserianthes falcataria L. ) derived reduced graphene oxide for fuel cell application

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