The Influence of Catalyst Layer Thickness on the Performance and Degradation of PEM Fuel Cell Cathodes with Constant Catalyst Loading

Darab, Mahdi; Barnett, Alejandro Oyarce; Lindbergh, Göran; Thomassen, Magnus Skinlo; Sunde, Svein

doi:10.1016/j.electacta.2017.02.101

Cited by 48 publications

(28 citation statements)

References 59 publications

(56 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 9 also shows Tafel impedances as extracted from electrochemical impedance spectroscopy (EIS) measurements at an overpotential of −200 mV. The Tafel impedance is defined as 42,43 Z t = Ê i i st [10] where i st ia the steady-state current density at which the impedance was recorded, andÊ andî are the complex amplitudes of potential and current. The solution resistance as determined from the high-frequency intercept of the impedance-plane plot with the real axis was subtracted from all data.…”

Section: Resultsmentioning

confidence: 99%

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Faid

Barnett

Seland

et al. 2019

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

Ni and Ni-doped with transition metals (TM) such as Fe and Co represent the most suitable electrodes for hydrogen evolution reaction (HER) in alkaline media. Various compositions of co-precipitated Ni 1+x Fe 2−x O 4 and Ni 1+y Co 2−y O 4 nanoparticles were investigated. The intrinsic HER catalytic activity is the same for all the catalysts, which we relate to similar values of the iso-electric point (IEP). However, the mass catalytic activity of the catalysts changes through a modification of the electrochemical surface area. Fractional reaction orders for hydrogen evolution revealed in all catalyst compositions are due to double layer effects and surface acid-base equilibria. Reaction order and Tafel slope of the catalysts are compatible with electrochemical adsorption as the rate-determining step for the HER. Tafel slopes were also evaluated independently from impedance spectroscopy, in good agreement with the polarization curves. Electrodes prepared from catalyst inks containing an anion-exchange ionomer displayed inferior catalytic activity for the HER as compared to electrodes prepared with Nafion in the ink. Chronoamperometry confirmed the sustained superior hydrogen kinetics over time of NiFe 2 O 4 and NiCo 2 O 4 composition over that of NiO. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP F520 Journal of The Electrochemical Society, 166 (8) F519-F533 (2019) ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 129.241.231.30 Downloaded on 2019-05-09 to IP

show abstract

Section: Resultsmentioning

confidence: 99%

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Faid

Barnett

Seland

et al. 2019

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…In the process of electrode fabrication, the pressing pressure has an obvious effect on the electrode structure. The thickness and porosity of the electrode are directly affected by different pressure . Following reference, thicker electrodes lead to higher ohmic loss, although their larger surface area can reduce the activation overpotential …”

Section: Polarization Analysis Of Gde With Different Fabrication Paramentioning

confidence: 99%

Polarization Analysis of Gas Diffusion Electrode with Different Fabrication Parameters in Metal–Air Batteries

Zhao

et al. 2020

Energy Tech

View full text Add to dashboard Cite

The gas diffusion electrode (GDE) represents the most significant component in metal–air batteries (MABs). It is essential to understand the underlying behaviors of GDE and optimize its performance. Herein, a polarization separation method from total polarization curve to single activation, ohmic, and mass transport polarizations of GDE in MABs is proposed for the first time, which is then applied in the investigation of detailed polarization behaviors of the GDE by changing the fabrication parameters. As the polytetrafluoroethylene contents in the catalyst and gas diffusion layers and pressing pressure are adjusted, hydrophobicity, porosity, coverage, and thickness are changed to influence the performance of GDE. Through this analysis, a detailed understanding of the structure–performance relationship of GDE is achieved to improve the electrode design, architecture, and fabrication.

show abstract

“…For the sake of clarity, the spectrum is plotted as Tafel impedance Zt (i.e. impedance multiplied with the steadystate current density) (33).…”

Section: A) B)mentioning

confidence: 99%

Bimetallic Nano Electrocatalyst for HER in Alkaline Polymer Electrolysis

Faid,

Manikandan,

Seland

et al. 2018

Meet. Abstr.

Self Cite

View full text Add to dashboard Cite

Ni and alloys of Ni (with Fe, Co, Mo) still represent the most suitable electrodes for HER in alkaline media. Bimetallic nanoparticles of NiFe and NiCo were fabricated by coprecipitation and thermal reduction by oleylamine. The process of co-precipitation involves NaOH as a precipitation agent to precipitate the metal-based nitrates, while thermal reduction process involves the synthesis of metal-containing compounds using oleylamine, which act as reducing agent, surfactant, and solvent. Different synthesis conditions in terms of composition were studied. Structural characterization of nanoparticles was carried out using scanning electron microscopy, energy dispersive x-ray, X-ray diffraction, Raman spectroscopy and BET surface area. Electrochemical behavior of nanoparticles was investigated using rotating disk electrode. The electrochemical characterization studied the effect of catalyst composition on the electrochemical behavior of the catalyst.Recent developments in alkaline membrane technology have led to the possibility of using anion-exchange membranes containing alkaline ions (OH -, CO3 2-, HCO3 -) in water electrolysis. This technology has the potential of combining the advantage of nonprecious catalysts of the alkaline process, with the advantages of PEMEL, e.g. fast power-up/power-down rates, low parasitic energy losses, and low energy consumption, in other words consolidating the best of both technologies (3).

show abstract

The Influence of Catalyst Layer Thickness on the Performance and Degradation of PEM Fuel Cell Cathodes with Constant Catalyst Loading

Cited by 48 publications

References 59 publications

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Optimized Nickel-Cobalt and Nickel-Iron Oxide Catalysts for the Hydrogen Evolution Reaction in Alkaline Water Electrolysis

Polarization Analysis of Gas Diffusion Electrode with Different Fabrication Parameters in Metal–Air Batteries

Bimetallic Nano Electrocatalyst for HER in Alkaline Polymer Electrolysis

Contact Info

Product

Resources

About