A high-performance, bifunctional oxygen electrode catalysed with palladium and nickel-iron hexacyanoferrate

McKerracher, R. D.; Figueredo-Rodríguez, H. A.; León, Carlos Ponce de; Alegre, Cinthia; Baglio, V.; Aricò, A.S.; Walsh, Frank C.

doi:10.1016/j.electacta.2016.04.090

Cited by 25 publications

(23 citation statements)

References 36 publications

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“…Although Pd has been subject to extensive research with regards to fuel cell relevant electrocatalysis (e.g., its activity toward the hydrogen oxidation/evolution reaction (HOR/HER), [7][8][9] its robustness against poisoning in PEMFC anodes, 10 or its activity toward the electrochemical oxidation of small organic molecules 11 ), its activity toward the ORR has often been examined as a co-material to Pt [12][13][14] or other metals (e.g., as alloy component or core material for core-shell particles), 15 either focusing on the reduction of the required Pt amount or on the enhancement of catalyst activity for the ORR. Comprehensive reviews were given by Antolini and Shao.…”

mentioning

confidence: 99%

Monometallic Palladium for Oxygen Reduction in PEM Fuel Cells: Particle-Size Effect, Reaction Mechanism, and Voltage Cycling Stability

Mittermeier

Weiß

Gasteiger

et al. 2017

J. Electrochem. Soc.

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In this experimental study, we determine the size dependent activity as well as accelerated voltage cycling stability of various carbon supported palladium electrocatalysts for the oxygen reduction in acidic medium. Furthermore, ex-situ transmission electron microscopy studies before and after accelerated voltage cycling provide a deeper understanding regarding particle stability during voltage cycling. Regarding oxygen reduction, a particle size effect on the specific activity is observed, with bulky Pd-black (≈4 m 2 g −1 Pd ) exhibiting ≈x6 times higher activity than Pd supported on Vulcan carbon (≈190 m 2 g −1 Pd ). Mass activities, however, exhibit a strong correlation with catalyst surface area at small electrochemically active surface area (ECSA) values, but are observed to be nearly constant between ≈50−200 m 2 g −1 Pd . As stability tests during voltage cycling reveal a benefit for smaller surface areas, i.e. bigger particles, a limited gain in stability can be achieved by increasing catalyst particle size at a negligible cost of electrocatalytic mass-based activity. Moreover, we provide a deeper insight regarding the oxygen reduction reaction mechanism and show significant hints that a sequential two-plus-two electron reduction mechanism via intermediate hydrogen peroxide is likely to occur on carbon supported Pd catalysts.

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confidence: 99%

Monometallic Palladium for Oxygen Reduction in PEM Fuel Cells: Particle-Size Effect, Reaction Mechanism, and Voltage Cycling Stability

Mittermeier

Weiß

Gasteiger

et al. 2017

J. Electrochem. Soc.

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“…Graphene contains a single-atom thick and two-dimensional structure, and it is a superior material to enhance the interaction and dispersion of metal [20]. Therefore, graphene could improve the redox reaction [18,21,22], which has been previously demonstrated by the study of Pd catalysts supported on other types of carbon materials [23][24][25][26][27]. Fast ORR can be triggered effectively with precious metals [14][15][16][17], since they form coordination bonds and participate in ORR through their vacant d orbits [14,18].…”

Section: Introductionmentioning

confidence: 95%

Uniform Distribution of Pd on GO-C Catalysts for Enhancing the Performance of Air Cathode Microbial Fuel Cell

Wang

Zhao

et al. 2021

Catalysts

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Metal, as a high-performance electrode catalyst, is a research hotspot in the construction of a high-performance microbial fuel cell (MFC). However, metal catalyst nanoparticles and their dispersed carriers are prone to aggregation, producing catalytic electrodes with inferior qualities. In this study, Pd is uniformly dispersed on the graphene framework supported by carbon black to form nanocomposite catalysts (Pd/GO-C catalysts). The effect of the palladium loading amount in the catalyst on the catalytic performance of the air cathode was further studied. The optimized metal loading afforded a reduced resistance and improved accessibility of Pd particles for the ORR. The maximum current output of the 0.250 Pd (mg/cm2) MFC was 1645 mA/m2, which is 4.2-fold higher than that of the carbon paper cathode. Overall, our findings provide a novel protocol for the preparation of high-efficient ORR catalyst for MFCs.

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“…GDC modified with nitrogen doped graphene at carbon nanotube electrodes have been reported as effective for the generation of 25 mg dm −3 of H 2 O 2 at an applied potential of − 0.5 V vs. standard calomel electrode (SCE) 32 . The study to improve GDC modified with Fe (II) catalyst showed about 99% decolorization of methylene blue in 250 min at − 1.0 V vs. Hg/HgSO 4 33 . Nitrogen functionalised carbon nanotube cathodes was observed to be useful for complete degradation of methyl orange at − 0.85 V in 60 min 29 .…”

Section: Introductionmentioning

confidence: 97%

Synthesis and application of gas diffusion cathodes in an advanced type of undivided electrochemical cell

Zaidi

Luan

Harito

et al. 2020

Sci Rep

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This paper reports the oxidation of Remazol black B dye by employing iron ions catalyst based gas diffusion cathodes, (GDCs). A GDC was synthesized by using a layer of carbon black and iron ions catalyst for oxygen reduction to hydrogen peroxide. The results demonstrated around 97% decolorization of Remazol black-B dye for 50 min by iron ions catalyst based GDC. The degradation study was performed under electrogenerated hydrogen peroxide at a constant voltage of − 0.6 V vs Hg/HgSO4 in which the rate of degradation was correlated with hydrogen peroxide production. Overall, the GDC’s found to be effective method to degrade the dyes via electro-Fenton.

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A high-performance, bifunctional oxygen electrode catalysed with palladium and nickel-iron hexacyanoferrate

Cited by 25 publications

References 36 publications

Monometallic Palladium for Oxygen Reduction in PEM Fuel Cells: Particle-Size Effect, Reaction Mechanism, and Voltage Cycling Stability

Monometallic Palladium for Oxygen Reduction in PEM Fuel Cells: Particle-Size Effect, Reaction Mechanism, and Voltage Cycling Stability

Uniform Distribution of Pd on GO-C Catalysts for Enhancing the Performance of Air Cathode Microbial Fuel Cell

Synthesis and application of gas diffusion cathodes in an advanced type of undivided electrochemical cell

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