Cobalt–polypyrrole–carbon black (Co–PPY–CB) electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells: Composition and kinetic activity

Nguyen-Thanh, Danh; Frenkel, Anatoly I.; Wang, Jianqiang; O’Brien, Stephen; Akins, Daniel L.

doi:10.1016/j.apcatb.2011.03.034

Cited by 61 publications

(32 citation statements)

References 20 publications

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“…This type of materials is a prospective effective and durable alternative to both the traditional materials, based on Pt, and to innovative ones that exhibit potential environmental problems, owing to the use of Co. [2][3][4][5][6][7] In particular, Mn-based systems are currently the most widely used cathodes in metal/air batteries, owing to their low-cost and high catalytic activity for oxygen electroreduction in alkaline solution, resulting from their capability of decomposing hydrogen peroxide. [8][9][10][11] The use of transitional mixed oxides, such as Mn-Cu oxides, incorporated in PPy matrix has shown excellent electrocatalytic activity and good stability even at low pH, where mixed metal oxide cathodes usually undergo degradation.…”

Section: Introductionmentioning

confidence: 99%

High‐lateral resolution X‐ray fluorescence microspectroscopy and dynamic mathematical modelling as tools for the study of electrodeposited electrocatalysts

et al. 2015

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In this paper, we report on the use of high-space resolution soft X-ray fluorescence microspectroscopy for the study of electrodeposited composites containing catalytic ternary metal nanostructures. X-ray fluorescence maps are interpreted in terms of a dynamic mathematical model of the electrode morphology and metal space distribution, allowing to reproduce the observed space patterns and electrochemical transients by assigning an appropriate set of electrokinetic parameters. The discussed materials-science case is the electrochemical growth of a Mn-Mg-Cu-polypyrrole nanocomposite electrocatalyst material -free of expensive Pt and environmentally unfriendly Co -with promising performance for fuel-cell oxygen electrodes. The synergy of high-resolution compositional mapping with electrokinetic modelling not only provides the general rationale for quantitative use of potentially large compositional distribution datasets but also yields unprecedented insight into the specific catalyst synthesis process. The expounded application is just a prototypical case study of a more general approach, which can be employed for the understanding of electrochemical material science processes, both in situ and ex situ, as well as for the characterisation of the corresponding products, with no other limitations in principle than X-ray transmission and beam damage.

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Section: Introductionmentioning

confidence: 99%

High‐lateral resolution X‐ray fluorescence microspectroscopy and dynamic mathematical modelling as tools for the study of electrodeposited electrocatalysts

et al. 2015

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“…The criterion for ORR activity can be related to the negative cathodic peak, E p,c or E ORR corresponding to the oxygen reduction reaction. The higher the ORR activity, the closer the E p,c to the thermodynamic potential of 1.2 V . It is evident from Figure (a), that the PPy and PPy–Co samples show a reduction current in the presence of oxygen, however, no noticeable response is observed under N 2 saturated solution (data not shown).…”

Section: Resultsmentioning

confidence: 92%

Impact of p‐toluenesulfonate on polypyrrole–cobalt catalyst for oxygen reduction reaction

Kumar

Singh

et al. 2013

J of Applied Polymer Sci

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Polypyrrole (PPy) and polypyrrole p-toluenesulfonate (PPy/pTS) supported cobalt (Co) catalysts have been synthesized using in situ surfactant modified chemical oxidative polymerization. These catalysts have been characterized for their structure and electrocatalytic activity employing FT-IR, Raman, SEM, HRTEM, and electrochemical techniques. The influence of pTS on the morphology and oxygen reduction reaction (ORR) activity has been discussed in respect of the formation of polaronic and bipolaronic species. The impact of these species on the electrochemical performance has been studied using continuous cycling in acidic media. Overall, PPy/pTS-Co is found to be the best suitable candidate among the catalysts synthesized for this study and can become an attractive substitute as a non-noble catalyst material for cathode applications in fuel cells.

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“…Polymer electrode membrane fuel cells (PEMFC) are considered as ideal energy converting systems for power fields in stationary and mobile devices [1] . However, the major barrier to the commercialization of PEMFC is the high costs of Pt based catalysts and their insufficient stability [2,3] . Over the last several decades, a great deal of research has focused on reducing Pt loading or completely replacing Pt using non-noble metal catalysts.…”

Section: Introductionmentioning

confidence: 99%

“…Nitrogen (N)-containing precursors play a significant role during the M-N-C synthesis in order to form an active catalyst. Conducting polymers such as PPy, polyaniline (PANI), and polythiophene [2,7,8] have been used due to their superior properties. Among these polymers, PPy is an especially interesting N precursor since it includes large of nitrogen-heterocyclic compounds in its body.…”

Section: Introductionmentioning

confidence: 99%

“…In this article, we prepared a novel composite Fe-N/C catalysts using the activation of graphite as the carbon support. PPy/C was performed by in situ polymerization of the pyrrole monomer in the presence of graphite [2] . Fe nanoparticles were deposited onto PPy/C composites by the reduction of the metal ions (Fe 2+ ) using sodium borohydride [11] .…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Fe Nanoparticles on Polypyrrole Covered Graphite for Oxygen Reduction Reaction

Shang¹,

Suo²,

Wei³

et al. 2015

Proceedings of the 2015 International Conference on Electromechanical Control Technology and Transportation

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An amorphous Fe-based catalyst supported on polypyrrole-modified graphite is synthesized by a chemical method. The optimal Fe loading with the highest reduction current is 4 wt%. Their morphology, structure and chemical component were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS), respectively. The scanning electron microscopy show that the surfaces of graphite are decorated with metal nanoparticles. Under acid condition, the catalyst demonstrate high oxygen reduction reaction (ORR) activity with four-electron pathway.

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Cobalt–polypyrrole–carbon black (Co–PPY–CB) electrocatalysts for the oxygen reduction reaction (ORR) in fuel cells: Composition and kinetic activity

Cited by 61 publications

References 20 publications

High‐lateral resolution X‐ray fluorescence microspectroscopy and dynamic mathematical modelling as tools for the study of electrodeposited electrocatalysts

High‐lateral resolution X‐ray fluorescence microspectroscopy and dynamic mathematical modelling as tools for the study of electrodeposited electrocatalysts

Impact of p‐toluenesulfonate on polypyrrole–cobalt catalyst for oxygen reduction reaction

Synthesis of Fe Nanoparticles on Polypyrrole Covered Graphite for Oxygen Reduction Reaction

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