Highly active nitrogen-doped nanocarbon electrocatalysts for alkaline direct methanol fuel cell

Kruusenberg, Ivar; Ratso, Sander; Vikkisk, Merilin; Kanninen, Petri; Kallio, Tanja; Kannan, Arunachala Mada; Tammeveski, Kaido

doi:10.1016/j.jpowsour.2015.01.167

Cited by 57 publications

(27 citation statements)

References 69 publications

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“…[50][51][52][53][54][55] Figure 10 represents Tafel plots constructed on the basis of the RDE data shown in Figure 9. It has been reported previously, that pyridinic and/or graphitic N are actually responsible for the high ORR performance of N-doped carbon materials.…”

Section: Electrochemical Reduction Of Oxygenmentioning

confidence: 99%

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

et al. 2018

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Platinum nanoparticles were deposited on reduced graphene oxide (rGO) and nitrogen-doped rGO (rGOÀN) by He/H 2 plasma jet treatment of H 2 PtCl 6 aqueous solution for electroreduction of oxygen. Physical characterization of the prepared catalysts was performed by scanning electron microscopy, transmission electron microscopy and X-ray photoelectron spectroscopy. Electrochemical characterization was carried out by cyclic voltammetry and CO-stripping techniques. The oxygen reduction reaction (ORR) activity of the prepared Pt/rGO and Pt/ rGOÀN catalyst materials was investigated using the rotating disk electrode method in 0.1 M KOH and 0.05 M H 2 SO 4 . In both acidic and alkaline electrolytes, the catalyst materials prepared by the plasma jet method demonstrated superior electrocatalytic properties compared to that of commercial 20 wt% Pt/ C catalyst. Specific activity values for the ORR in acid electrolyte were 2-fold and in alkaline media more than 3-fold higher than that obtained for commercial Pt/C catalyst.

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Section: Electrochemical Reduction Of Oxygenmentioning

confidence: 99%

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

et al. 2018

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“…The search for efficient electrocatalysts toward the oxygen reduction reaction (ORR) devoid of Pt, or containing small amounts of this metal, has intensified in recent years, in an effort to improve the sluggish kinetics of a reaction of great relevance in devices such as fuel cells (preferentially resulting in water as the final product) or in the production of H 2 O 2 …”

Section: Introductionmentioning

confidence: 99%

Use of Rotating Ring‐Disk Electrodes to Investigate Graphene Nanoribbon Loadings for the Oxygen Reduction Reaction in Alkaline Medium

Cardoso

Fortunato

2018

ChemElectroChem

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The oxygen reduction reaction (ORR) is typically slow. Its kinetics, however, are influenced not only by the structure, nature, and doping of electrocatalysts, but also by the loadings of these materials, where all of these factors influence ORR selectivity to produce H2O and/or H2O2. The loadings employed for graphene nanoribbon (GNR)‐modified glassy carbon (GC) electrodes and GC disk modified with commercial Pt (20 wt.%) on carbon (PtC) at 150 μg cm−2 (also resulting in electrode roughness) produced turbulence in the electrolyte flow, significantly changing the geometry of the rotating ring‐disk electrode (RRDE) and collection efficiency (N), as well as causing N to change with the rotation rate of the electrode. This effect toward the ORR was investigated with two analytical methods derived by Wu et al. and Zhou et al. A current deconvolution method for a better‐resolved Tafel analysis separating normalHnormalO2- formation and reduction reactions resulted in more insightful understanding of the ORR responses provided by the RRDE for different GNR and PtC loadings.

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“…Intense research activity in last decade yielded considerable amount of high surface area carbon-based composites [3][4][5]. Among the numerous non-Pt catalyst candidates toward the ORR, such as other precious metals and their alloys [6,7], metal macrocycles [8,9], N-containing high-area carbon [10][11][12][13][14][15][16][17], and different transition metal oxides, especially manganese oxides intercalated to carbon-based composites demonstrated itself as promising cathode materials for fuel cells [18][19][20][21][22][23][24]. Manganese oxide (MnO x ) is one of the most promising alternatives with considerable catalytic activity toward the ORR with up-and-coming advantages, such as wide natural abundance, low cost, and environmental friendliness [25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Oxygen Reduction Reaction Activity with Electrodeposited Ag on Manganese Oxide–Graphene Supported Electrocatalyst

et al. 2015

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M a n g a n e s e o x i d e -m o d i f i e d g r a p h e n e nanosheet-supported silver nanocatalyst (Ag-MnO x /G) was prepared via two-step chemical and electrochemical deposition. Surface characterization of the prepared AgMnO x /G catalyst was performed by X-ray photoelectron spectroscopy, scanning electron microscopy, as well as Xray fluorescence techniques, and the electrocatalytic activity toward the oxygen reduction reaction (ORR) in alkaline media was studied using cyclic voltammetry and the rotating disk electrode (RDE) method. The onset potential of the ORR of the prepared catalyst material shifted positive about 40 mV, and the half-wave potential 20 mV compared to those of the bulk Ag electrode. After 1000 potential cycles between 0.05 and 1.1 V for accelerated aging tests, high stability of the Ag-MnO x /G catalyst in the ORR was observed with the half-wave potential of the ORR shifting negatively only about 0.04 V. RDE studies displayed unconditional improvement of electrochemical activity and long-term durability for the Ag-MnO x /G composite material.

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Highly active nitrogen-doped nanocarbon electrocatalysts for alkaline direct methanol fuel cell

Cited by 57 publications

References 69 publications

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Oxygen Electroreduction on Pt Nanoparticles Deposited on Reduced Graphene Oxide and N‐doped Reduced Graphene Oxide Prepared by Plasma‐assisted Synthesis in Aqueous Solution

Use of Rotating Ring‐Disk Electrodes to Investigate Graphene Nanoribbon Loadings for the Oxygen Reduction Reaction in Alkaline Medium

Enhanced Oxygen Reduction Reaction Activity with Electrodeposited Ag on Manganese Oxide–Graphene Supported Electrocatalyst

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