Rotating ring-disk electrode as a quantitative tool for the investigation of the oxygen evolution reaction

Filimonenkov, Ivan S.; Istomin, S.Ya.; Antipov, Evgeny V.; Tsirlina, Galina A.; Savinova, Elena R.

doi:10.1016/j.electacta.2018.08.056

Cited by 38 publications

(34 citation statements)

References 43 publications

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“…Coupling electrochemical tools such as rotating ring disk electrode (RRDE) [30][31] and electrochemical quartz microbalance microscopy (EQCM) with physical characterizations such as X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray absorption spectroscopy (XAS) at Ni K-edge, we discuss in this study the exact effect of pH on both the OER activity and the catalyst stability for each of these different classes of compounds.…”

Section: Tocmentioning

confidence: 99%

“…When compared to LaNiO3-δ, a slight shift towards higher energy for the Ni K-edge was measured for LLNO, suggesting a slightly higher Ni oxidation state which could be explained by the presence of oxygen vacancies in LaNiO3-δ, as often reported for as synthetized compound. 35 The crystal structure of LLNO was further RRDE measurements [30][31] were further carried out to better understand the effect of pH on the anodic current, and more specifically the current resulting from the oxygen evolution on the surface of the catalyst from the contribution arising from catalyst degradation (Figure 2 and Figure S6). By calculating the collection efficiency = ( / ) at a fixed potential (E = 1.6 V vs. RHE) at which the oxygen evolution occurs, the effective current contributing from oxygen evolution can thus be estimated.…”

Section: Tocmentioning

confidence: 99%

“…We then systematically studied the physical and electrochemical properties of these two Ni-based crystalline oxides and compared them with the state-of-the-art Ni–Fe (oxy)hydroxide (Ni 1– x Fe x OOH) amorphous catalyst , (Figure S1). Coupling electrochemical tools such as rotating ring disk electrode (RRDE) , and electrochemical quartz microbalance microscopy (EQCM) with physical characterizations such as X-ray diffraction (XRD), transmission electron microscopy (TEM), and X-ray absorption spectroscopy (XAS) at the Ni K-edge, we discuss in this study the exact effect of pH on both the OER activity and the catalyst stability for each of these different classes of compounds.…”

mentioning

confidence: 99%

“…RRDE measurements , were further carried out to better understand the effect of pH on the anodic current and, more specifically, the current resulting from the oxygen evolution on the surface of the catalyst from the contribution arising from catalyst degradation (Figures and S6). By calculating the collection efficiency η = ( i ring / i disk ) at a fixed potential ( E = 1.6 V vs RHE) at which the oxygen evolution occurs, the effective current contributing from oxygen evolution can thus be estimated .…”

mentioning

confidence: 99%

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Revealing pH-Dependent Activities and Surface Instabilities for Ni-Based Electrocatalysts during the Oxygen Evolution Reaction

et al. 2018

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Section: Tocmentioning

confidence: 99%

Section: Tocmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Revealing pH-Dependent Activities and Surface Instabilities for Ni-Based Electrocatalysts during the Oxygen Evolution Reaction

et al. 2018

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“…Generator-collector experiments offer insights into the mechanisms of electrochemical reactions by correlating the product and generator currents. [1,2] A common method is based on driving a redox reaction on the generator electrode and detection of the reverse reaction on the collector electrode [3][4][5][6][7][8] , which works for fast redox couples [1,9] and detection of catalytic products. [10][11][12][13] Electrochemical detection has several requirements.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a Modular Flow Cell System for Electrocatalytic Experiments and Comparison to a Commercial RRDE System

Stender¹,

Obata²,

Baumung³

et al. 2020

Preprint

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Generator-collector experiments offer insights into the mechanisms of electrochemical reactions by correlating the product and generator currents. Most commonly, these experiments are performed using a rotating ring-disk electrode (RRDE). We developed a double electrode flow cell (DEFC) with exchangeable generator and detector electrodes where the electrode width equals the channel width. Commonalities and differences between the RRDE and DEFC are discussed based on analytical solutions, numerical simulations and measurements of the ferri-/ferrocyanide redox couple on Pt electrodes in a potassium chloride electrolyte. The analytical solutions agree with the measurements using electrode widths of 5 and 2 mm. Yet, we find an unexpected dependence on the exponent of the width so that wider electrodes cannot be analysed using the conventional analytical solution. In contrast, all the investigated electrodes show a collection efficiency of close to 35.4% above a minimum rotation speed or flow rate, where the narrowest electrode is most accurate at the cost of precision and the widest electrode the least accurate but most precise. Our DEFC with exchangeable electrodes is an attractive alternative to commercial RRDEs due to the flexibility to optimize the electrode materials and geometry for the desired reaction.

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A Modular Double Electrode Flow Cell with Exchangeable Generator and Detector Electrodes

et al. 2023

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Generator-collector experiments offer insights into the mechanisms of electrochemical reactions by correlating the product and generator currents. Most commonly, these experiments are performed using commercially-available rotating ring-disk electrodes (RRDE). We developed a modular double electrode flow cell (DEFC) with exchangeable generator and detector electrodes where the electrode width equals the channel width. As a test case, we considered the ferri-/ferrocyanide redox couple in experiments, analytical calculations and multiphysics simulations. Wall effects reduce the current density by less than 10 % in our geometry for the investigated conditions and the analytical solution for the limiting current at the generator electrode applies to widths up to 5 mm. The collection efficiency for all investigated electrode widths is close to the expected 35.4 % above a flow rate of 1.0 (mL/min) 1/3 but only independent of the flow rate for electrodes with width 5 mm and larger. Kinetic constants of 1.3-1.9 • 10 À 3 cm/s are obtained from Koutecký-Levich analysis and 21.0-5.0 • 10 À 3 cm/s from Nicholson analysis for the DEFC, which falls within the range reported previously. We conclude that our DEFC with exchangeable electrodes is an attractive alternative to commercial RRDEs which offers the flexibility to optimize both the generator and collector materials for the desired reaction.

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Rotating ring-disk electrode as a quantitative tool for the investigation of the oxygen evolution reaction

Cited by 38 publications

References 43 publications

Revealing pH-Dependent Activities and Surface Instabilities for Ni-Based Electrocatalysts during the Oxygen Evolution Reaction

Revealing pH-Dependent Activities and Surface Instabilities for Ni-Based Electrocatalysts during the Oxygen Evolution Reaction

Characterization of a Modular Flow Cell System for Electrocatalytic Experiments and Comparison to a Commercial RRDE System

A Modular Double Electrode Flow Cell with Exchangeable Generator and Detector Electrodes

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