Characterisation tools development for PEM electrolysers

Merwe, Jan van der; Uren, Kenneth R.; Schoor, George van; Bessarabov, Dmitri

doi:10.1016/j.ijhydene.2014.02.096

Cited by 64 publications

(42 citation statements)

References 24 publications

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“…On the whole the current-voltage char acteristics of the systems with solid polymer electro lyte are comparable to those given in literature. For example, the electrolysis voltage is similar to that given in works [2,43,44] for the Nafion 115 membrane: it is about 1.7 V at a current of 1 A/cm 2 (Fig. 8a).…”

Section: Electrochemical Parameters Of the Catalystssupporting

confidence: 70%

Study of nanostructured electrocatalysts synthesized by the platinum magnetron–ion-beam sputtering onto metallized nanostructured carbonaceous support

Grigoriev¹,

Fedotov

Murzin

et al. 2015

Russ J Electrochem

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Nanostructured electrocatalysts for hydrogen electrochemical systems with solid polymer elec trolyte were synthesized by the platinum magnetron-ion beam sputtering onto nanostructured carbon aceous support Vulcan XC 72 premetallized by the impregnation-reduction method. To be able to perform comparative analysis, a number of mono and bimetallic catalyst samples was synthesized using impregna tion-reduction, a traditional method. Thus prepared catalysts were examined by thermogravimetric method, transmission electron microscopy, X ray diffraction analysis, X ray photoelectron spectroscopy, X ray absorption spectroscopy, and cyclic voltammetry. The electrodes prepared with the synthesized catalysts were tested in fuel cell and water electrolyzer with solid polymer electrolyte. This study confirmed the possibility of preparation of multicomponent catalysts with complicated structures (such as the core-shell structure) over nanostructured carbon support by magnetron sputtering and demonstrated the effectiveness of their per formance as parts of electrochemical systems with solid polymer electrolyte. The effect of additional ion beam processing of the Pt/C electrocatalysts on their efficiency is also studied.Keywords: magnetron-ion beam sputtering, platinum metal nanoparticles on carbonaceous support, mono and bimetallic electrocatalysts, hydrogen electrochemical system, solid polymer electrolyte

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Section: Electrochemical Parameters Of the Catalystssupporting

confidence: 70%

Study of nanostructured electrocatalysts synthesized by the platinum magnetron–ion-beam sputtering onto metallized nanostructured carbonaceous support

Grigoriev¹,

Fedotov

Murzin

et al. 2015

Russ J Electrochem

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show abstract

“…At high current densities in aPEM test station, the power source of an auxiliary EIS analyzer can influence the actual measurements performed by the test station;t herefore, alternative techniques,s uch as current interrupt (CI), have been proposed. [118] However,the mass-transport resistance is Figure 16. Degradation of Ir 0.67 Sn 0.33 O 2 after repetitive potentialc ycles; 100 mVs À1 ;0.5 m H 2 SO 4 ; [110] reprinted with permission from the RSC.…”

Section: Electrochemical Impedance Spectroscopy (Eis)mentioning

confidence: 99%

The Stability Challenges of Oxygen Evolving Catalysts: Towards a Common Fundamental Understanding and Mitigation of Catalyst Degradation

et al. 2017

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This Review addresses the technical challenges, scientific basis, recent progress, and outlook with respect to the stability and degradation of catalysts for the oxygen evolution reaction (OER) operating at electrolyzer anodes in acidic environments with an emphasis on ion exchange membrane applications. First, the term "catalyst stability" is clarified, as well as current performance targets, major catalyst degradation mechanisms, and their mitigation strategies. Suitable in situ experimental methods are then evaluated to give insight into catalyst degradation and possible pathways to tune OER catalyst stability. Finally, the importance of identifying universal figures of merit for stability is highlighted, leading to a comprehensive accelerated lifetime test that could yield comparable performance data across different laboratories and catalyst types. The aim of this Review is to help disseminate and stress the important relationships between structure, composition, and stability of OER catalysts under different operating conditions.

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“…Besides classic polarization curves (IV), other tools that researchers employed on WE include current interrupt, cyclic voltammetry, more visual approaches, such as electron microscopy, and electrochemical impedance spectroscopy (EIS) [10,11]. EIS is a versatile characterization technique that is already widely used in fuel cell applications [12,13] and many researchers have also implemented EIS as a tool in their investigations on PEM electrolyzers [14,15]. With the above mentioned characterization techniques, performance investigations for different membrane-electrode-assemblies (MEAs) in terms of materials and loading were compared [16,17], as well as studies on the impact of the feed water flow type [18] and stoichiometry [19].…”

Section: Introductionmentioning

confidence: 99%

Model-supported characterization of a PEM water electrolysis cell for the effect of compression

Frensch

Olesen

Araya

et al. 2018

Electrochimica Acta

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This paper investigates the influence of the cell compression of a PEM water electrolysis cell. A small single cell is therefore electrochemically analyzed by means of polarization behavior and impedance spectroscopy throughout a range of currents (0.01 A cm −2 to 2.0 A cm −2 ) at two temperatures (60• C and 80• C) and eight compressions (0.77 MPa to 3.45 MPa). Additionally, a computational model is utilized to support the analysis. The main findings are that cell compression has a positive effect on overall cell performance due to decreased contact resistances, but is subject to optimization. In this case, no signs of severe mass transport problems due to crushed transport layers are visible in either polarization curves or impedance plots, even at high currents. However, a Tafel plot analysis revealed more than one slope throughout the current range. The change in the Tafel slope is therefore discussed and connected to the electrochemical reaction or an ohmic contribution from a non-electrode component.

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Characterisation tools development for PEM electrolysers

Cited by 64 publications

References 24 publications

Study of nanostructured electrocatalysts synthesized by the platinum magnetron–ion-beam sputtering onto metallized nanostructured carbonaceous support

Study of nanostructured electrocatalysts synthesized by the platinum magnetron–ion-beam sputtering onto metallized nanostructured carbonaceous support

The Stability Challenges of Oxygen Evolving Catalysts: Towards a Common Fundamental Understanding and Mitigation of Catalyst Degradation

Model-supported characterization of a PEM water electrolysis cell for the effect of compression

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