Platinum/polypyrrole-carbon electrocatalysts for direct borohydride-peroxide fuel cells

Oliveira, Raisa C. P.; Milikić, Jadranka; Daş, Elif; Yurtcan, Ayşe Bayrakçeken; Santos, Diogo M.F.; Šljukić, Biljana

doi:10.1016/j.apcatb.2018.06.057

Cited by 77 publications

(39 citation statements)

References 96 publications

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“…After this discovery, many combinations of catalysts and catalytic masses using noble metals were proposed, for example: Au, Pt and Pd bulk electrodes [5,6], palladium layers on Pt(111) [7], Pt(111) and Pt(111) modified by a pseudomorphic Pd monolayer [8], Pt/C, AuPt/C and Au/C [9,10], Pt, Ag and alloyed Pt-Ag [11], Pt nanoparticles immobilized in mesoporous silica-coated magnetic nanocapsules [12], Ru-Co-PEDOT nanocomposites [13], PdNix-B/carbon nanotube-catalysed anode [14] and platinum/polypyrrolecarbon electrocatalysts [15].…”

Section: Introductionmentioning

confidence: 99%

Structural and catalytic properties of Ni–Co spinel and its composites

et al. 2019

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Pure nickel-cobalt (Ni-Co) spinel and its two composites with active carbon and multi-walled carbon nanotubes (MWCNTs) were synthesized. X-ray diffraction confirmed the nickel cobaltites of cubic syngony and lattice constants for nanosized crystallites. Fourier transform infrared spectra confirmed an inverse spinel consisting of a tetrahedral site Co 2+ and octahedral sites Ni 2+ and Co 2+. Scanning electron microscopy images demonstrated a surface texture typical for spinels and agglomerates of composite particles with active carbon and MWCNTs. All the synthesized samples have a surface area and porosity that are sufficient for the flow of heterogeneous catalytic processes. The micropore volume of the composite with MWCNTs constituted only 4% of the total porosity, while this percentage represented 25% for the composite on the basis of active carbon. The high catalytic activity of Ni-Co spinel is proved in the model reaction of borohydride hydrolysis. To create composite spinel catalysts, active carbon showed itself to be a more efficient carrier for the catalytically active mass of spinel, as compared to MWCNTs.

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Section: Introductionmentioning

confidence: 99%

Structural and catalytic properties of Ni–Co spinel and its composites

et al. 2019

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“…Recently, Ye et al [79] introduced a combined system with a strong electrostatic attraction between PANI and a proton (perfluorosulfonic acid (PFSA), which improved the long-term stability of Pt electrocatalysts for oxygen reduction reaction compared to commercial porous carbon nanosphere-supported Pt catalysts. Pt NPs deposited on polypyrrole-carbon composites displayed superior catalytic activity both as anodes and cathodes for borohydride oxidation reaction in an alkaline medium and for hydrogen peroxide reduction reaction in an acidic medium [80]. both as anodes and cathodes for borohydride oxidation reaction in an alkaline medium and for hydrogen peroxide reduction reaction in an acidic medium [80].…”

Section: Nanohybrid Electrode Materials Using Modified Cps As Supportmentioning

confidence: 99%

“…Pt NPs deposited on polypyrrole-carbon composites displayed superior catalytic activity both as anodes and cathodes for borohydride oxidation reaction in an alkaline medium and for hydrogen peroxide reduction reaction in an acidic medium [80]. both as anodes and cathodes for borohydride oxidation reaction in an alkaline medium and for hydrogen peroxide reduction reaction in an acidic medium [80]. Moreover, conducting polymers modified with metal oxides, carbon nanotubes, graphene, etc.…”

Section: Nanohybrid Electrode Materials Using Modified Cps As Supportmentioning

confidence: 99%

“…Pt/C/PEDOT Carbon paper coated 3,4-polyethylenedioxythiophene MOR [72] Pd nanodendritic /C/PEDOT Carbon paper coated 3,4-polyethylenedioxythiophene Alcohols oxidation [73] Pt nanocactus /PANI/ CFP Poly (aniline) decorated with platinum on carbon fiber paper Toluene oxidation [74] Pd nanoplates /PDPB/Nafion Nafion modified poly(diphenylbutadyine) nanofiber EOR [75] Pt/C-PANI Vulcan XC-72 and PANI-doped with trifluoromethane sulfonic acid MOR [76] Pt/PEDOT/PSS 3,4-polyethylenedioxythiophene modified with poly(styrene sulfonic acid) (PSS) MOR [77] Pt-Ru/PANI/PSS Polyaniline-poly(styrene sulfonic acid) (PSS) MOR [78] Pt-PFSA/C/PANI Perfluorosulfonic acid, PFSA and polyaniline ORR [79] Pt/PPy-C Polypyrrole-carbon borohydride oxidation and hydrogen peroxide reduction [80] Pt…”

Section: Electrode Functional Unit As Support Fuel Cells Reactionmentioning

confidence: 99%

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Conducting Polymer-Based Nanohybrids for Fuel Cell Application

2020

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Carbon materials such as carbon graphitic structures, carbon nanotubes, and graphene nanosheets are extensively used as supports for electrocatalysts in fuel cells. Alternatively, conducting polymers displayed ultrahigh electrical conductivity and high chemical stability havegenerated an intense research interest as catalysts support for polymer electrolyte membrane fuel cells (PEMFCs) as well as microbial fuel cells (MFCs). Moreover, metal or metal oxides catalysts can be immobilized on the pure polymer or the functionalized polymer surface to generate conducting polymer-based nanohybrids (CPNHs) with improved catalytic performance and stability. Metal oxides generally have large surface area and/or porous structures and showed unique synergistic effects with CPs. Therefore, a stable, environmentally friendly bio/electro-catalyst can be obtained with CPNHs along with better catalytic activity and enhanced electron-transfer rate. The mass activity of Pd/polypyrrole (PPy) CPNHs as an anode material for ethanol oxidation is 7.5 and 78 times higher than that of commercial Pd/C and bulk Pd/PPy. The Pd rich multimetallic alloys incorporated on PPy nanofibers exhibited an excellent electrocatalytic activity which is approximately 5.5 times higher than monometallic counter parts. Similarly, binary and ternary Pt-rich electrocatalysts demonstrated superior catalytic activity for the methanol oxidation, and the catalytic activity of Pt24Pd26Au50/PPy significantly improved up to 12.5 A per mg Pt, which is approximately15 times higher than commercial Pt/C (0.85 A per mg Pt). The recent progress on CPNH materials as anode/cathode and membranes for fuel cell has been systematically reviewed, with detailed understandings into the characteristics, modifications, and performances of the electrode materials.

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“…Because CO formation as a result of dehydration pathway has a negative effect on the activity and stability of catalysts, the dehydrogenation pathway is the more desired pathway for FAEO …”

Section: Introductionmentioning

confidence: 99%

Towards more active and stable PdAgCr electrocatalysts for formic acid electrooxidation: The role of optimization via response surface methodology

et al. 2019

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In this study, multiwall carbon nanotube (MCNT)-supported Pd (Pd/MWCNT) catalysts are prepared by using NaBH 4 reduction method. In order to maximize the oxidation and reduction of H 2 SO 4 , synthesis conditions (Pd ratio, molar ratio of NaBH 4 /K 2 PdCl 4 , volume of deionized water, and duration of agitation) are optimized by using response surface methodology (RSM). The optimum synthesis conditions are determined as 58.2% of Pd by weight, 154.6 molar ratio of NaBH 4 to K 2 PdCl 4 , 19.48 mL of deionized water, and 186.16 min of agitation duration. The effect of electrochemical measurement conditions on the oxidation kinetics of Pd/MWCNT is also investigated by RSM. The optimum electrochemical measurement conditions are found as 10 μL of catalyst mixture, 90°C of H 2 SO 4 solution, and 5.5 M H 2 SO 4 . The Pd/MWCNT, Pd 50 Ag 50 /MWCNT, and Pd 65.6 Ag 33.6 Cr 0.80 /MWCNT catalysts prepared under optimized conditions are characterized by using X-ray diffraction, transmission electron microscopy, N 2 adsorption-desorption, and inductively coupled plasma mass spectrometry. The crystallite sizes of these catalysts are found as 4.85, 5.66, and 5.26 nm for Pd/MWCNT, Pd 50 Ag 50 /MWCNT, and Pd 65.6 Ag 33.6 Cr 0.80 /MWCNT catalysts, respectively. Isotherms of all these catalysts are found to be similar to Type V isotherms with H3 hysteresis loop. The average particle size of Pd 50 Ag 50 / MWCNT and Pd 65.6 Ag 33.6 Cr 0.80 /MWCNT catalysts are determined as 5.2 and 9.2 nm, respectively. Electrochemical performance of as-prepared catalysts is evaluated by using cyclic voltammetry and chronoamperometry. The formic acid electrooxidation (FAEO) activities are found as 18.9, 27.8, and 51.6 mA/cm 2 for Pd/MWCNT, Pd 50 Ag 50 /MWCNT, and Pd 65.6 Ag 33.6 Cr 0.80 /MWCNT, respectively. Pd 65.6 Ag 33.6 Cr 0.80 /MWCNT shows the highest activity and stability. Optimization of synthesis conditions and electrochemical measurement parameters allow us to obtain very good electrochemical activity and stability for FAEO reaction compared with anode catalysts in the literature.

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Platinum/polypyrrole-carbon electrocatalysts for direct borohydride-peroxide fuel cells

Cited by 77 publications

References 96 publications

Structural and catalytic properties of Ni–Co spinel and its composites

Structural and catalytic properties of Ni–Co spinel and its composites

Conducting Polymer-Based Nanohybrids for Fuel Cell Application

Towards more active and stable PdAgCr electrocatalysts for formic acid electrooxidation: The role of optimization via response surface methodology

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