Electrodeposited MnO<sub><i>x</i></sub>/PEDOT Composite Thin Films for the Oxygen Reduction Reaction

Vigil, Julian A.; Lambert, Timothy N.; Eldred, Kaitlyn

doi:10.1021/acsami.5b07684

Cited by 45 publications

(41 citation statements)

References 37 publications

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“…PEDOT can be synthesized by electrochemical polymerization using an active supporting electrolyte or by oxidative chemical polymerization to obtain aqueous dispersions stabilized by a water-soluble poly(styrene sulfonate) [15][16][17]. In last years, PEDOT and its derivatives have been widely applied in the energy field, as for example to fabricate the cathode and anode in all-organic supercapacitors [18,19], electrochemical microactuators [20], and catalysts for polymer electrolyte fuel cells [21,22]. Furthermore, in a very recent study, solidstate organic electrochemical supercapacitors have been fabricated combining PEDOT 3 electrodes, a biohydrogel as electrolyte system, and polyaniline fibers as redox additive [23].…”

Section: Among Commercially Available Ecps Poly(34-ethylenedioxythimentioning

confidence: 99%

Improving the fabrication of all-polythiophene supercapacitors

2017

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Abstract. The influence of the preparation method in the properties of poly(3,4-ethylenedioxythiophene) (PEDOT) electrodes used to manufacture organic energy storage devices, as for example supercapacitors, have been examined by considering a reduction of both monomer and supporting electrolyte concentrations during the anodic polymerization reaction. Thus, the excellent electrochemical properties of PEDOT films prepared using quiescent solutions have been preserved by applying controlled agitation to the polymerization process, even though the concentration of monomer and supporting electrolyte were reduced 5 and 2 times, respectively. For example, the charge stored for reversible exchange in a redox process, the electrochemical stability and the current productivity of films achieved using quiescent solutions have been preserved using a dynamic reaction medium in which the concentrations of monomer and supporting electrolyte are several times lower. The excellent properties of PEDOT electrodes prepared using optimized dynamic conditions have also been proved by constructing a symmetric supercapacitor. This energy storage device, which has been used as power source for a LED bulb, is rechargeable and exhibits higher chargedischarge capacities than supercapacitors prepared with electrodes derived from quiescent solutions. In addition of bring an efficacious procedure for preparing costeffective PEDOT films with excellent properties, the proposed dynamic conditions reduce the environmental hazards of depleted reaction media.

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Section: Among Commercially Available Ecps Poly(34-ethylenedioxythimentioning

confidence: 99%

Improving the fabrication of all-polythiophene supercapacitors

2017

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“…At present, there are many methods to improve the conductivity of TMOs. [88][89][90][91] The coupling of TMOs with various excellent conductive support Figure 8. a) LSV curves of Co/N-CNTs, Fe/N-CNTs, Ni/N-CNTs, multi-walled carbon nanotubes, RuO 2 , and Pt/C at a rotation rate of 1600 rpm with a scan rate of 10 mV s À1 .…”

Section: Transition Metal Oxides Chalcogenides Nitrides/ Oxynitridementioning

confidence: 99%

“…Increasing their conductivity is a primary prerequisite for use as an electrocatalyst. At present, there are many methods to improve the conductivity of TMOs . The coupling of TMOs with various excellent conductive support materials such as metal nanoparticles, carbon‐based materials, and conductive polymers is an effective way to improve the electrical conductivity between TMOs.…”

Section: Introduction To Oxygen Reduction Catalystmentioning

confidence: 99%

Recent Advances and Prospects of Metal‐Based Catalysts for Oxygen Reduction Reaction

et al. 2019

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Fuel cells, as one of the most promising technologies in sustainable energy conversion systems, hold great expectations for commercial applications. Cathode oxygen reduction reaction (ORR) kinetics of fuel cells are very slow and require a large overpotential to make the reaction occur, which greatly limits the energy output of fuel cells. Therefore, designing and preparing a highly active and stable ORR catalyst has become a great challenge. Herein, recent advances in platinum‐based and platinum‐free materials in metal‐based catalysts are focused on, including structural properties, synthesis methods, performance characterization, and catalytic mechanisms. Although platinum‐based precious metal catalysts have excellent performance, high prices limit the scale of commercial fuel cells. Nonprecious metal catalysts (e.g., transition metal nitrogen‐doped carbon‐based catalysts (M‐N/C), transition metal compounds (transition metal oxides—TMOs, transition metal carbides—TMCs, transition metal nitrides/transition metal oxynitrides—TMNs/TMNOs), layered double hydroxides—LDHs) completely eliminate dependence on precious metals and exhibit excellent ORR catalytic activity and stability. Finally, the ideas for future design and preparation of new ORR catalysts and challenges in the future of research work are discussed.

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“…As the intensive research efforts were devoted to the development of alternative ORR electrocatalysts, a wide range of nonprecious metal catalysts have been explored, including metal‐free nitrogen‐doped carbon (N‐doped C), nonprecious‐metal oxides and carbides, transition‐metal‐coordinating macrocyclic compounds, and transition‐metal/nitrogen‐doped carbon catalysts (M‐N/C) . Among these candidates, the M‐N/C materials exhibit comparable activity to Pt‐based ones because the active sites are created on the surface by the metal‐nitrogen coordination .…”

Section: Introductionmentioning

confidence: 99%

A Low‐Cost and Facile Method for the Preparation of Fe‐N/C‐Based Hybrids with Superior Catalytic Performance toward Oxygen Reduction Reaction

Zhang

Wang

Jia

et al. 2019

Adv Materials Inter

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Fe‐N‐doped graphitic carbon materials exhibit high efficiency and durability for oxygen reduction reaction (ORR). Although iron has relatively low price, the precursors for carbon and nitrogen used in previous studies have relatively high cost. Here reported is the preparation of highly efficient Fe‐N/C‐based ORR electrocatalysts by use of low‐cost urea as the precursors. Fe‐N/C‐based hybrids are prepared through a two‐step pyrolysis. During the first‐step pyrolysis, the precursors convert into g‐C3N4 with Fe located into the sixfold cavities, which ensures the relatively uniform distribution of Fe. The second‐step pyrolysis converts Fe‐g‐C3N4 into Fe‐N/C‐based hybrids which contain multiple types of active components, Fe moieties (FeCxNy or FeNx), Fe and Fe3N nanoparticles, for ORR. The obtained Fe‐N/C‐based hybrids display a superior electrocatalytic performance for ORR with an onset potential of 0.940 V and half‐wave potential of 0.810 V versus reversible hydrogen electrode, which are comparable to those of Pt/C at the same catalyst loading. The hybrids show higher tolerance to methanol and much greater long‐term stability than commercial Pt/C. The findings provide a cost‐effective approach for the preparation of high efficient and stable electrocatalysts for ORR and will be very helpful to the development of electrochemical energy storage and conversion.

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Electrodeposited MnO_x/PEDOT Composite Thin Films for the Oxygen Reduction Reaction

Cited by 45 publications

References 37 publications

Improving the fabrication of all-polythiophene supercapacitors

Improving the fabrication of all-polythiophene supercapacitors

Recent Advances and Prospects of Metal‐Based Catalysts for Oxygen Reduction Reaction

A Low‐Cost and Facile Method for the Preparation of Fe‐N/C‐Based Hybrids with Superior Catalytic Performance toward Oxygen Reduction Reaction

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Electrodeposited MnOx/PEDOT Composite Thin Films for the Oxygen Reduction Reaction

Cited by 45 publications

References 37 publications

Improving the fabrication of all-polythiophene supercapacitors

Improving the fabrication of all-polythiophene supercapacitors

Recent Advances and Prospects of Metal‐Based Catalysts for Oxygen Reduction Reaction

A Low‐Cost and Facile Method for the Preparation of Fe‐N/C‐Based Hybrids with Superior Catalytic Performance toward Oxygen Reduction Reaction

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Electrodeposited MnO_x/PEDOT Composite Thin Films for the Oxygen Reduction Reaction