Determination of adsorption isotherms of hydrogen and hydroxide at Pt–Ir alloy electrode interfaces using the phase-shift method and correlation constants

Chun, Jang H.

doi:10.1016/j.ijhydene.2007.10.044

Cited by 18 publications

(63 citation statements)

References 16 publications

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“…These aspects are described elsewhere. 17,18,[21][22][23][24][25][26] In this work, one can also confirm that the values of g and K o for the Temkin adsorption isotherms are approximately 4.6 and 10 times greater than those for the correlated Frumkin or Langmuir adsorption isotherms, respectively. The Temkin adsorption isotherms correlating with the Frumkin or Langmuir adsorption isotherms, and vice versa, are readily determined using the correlation constants.…”

Section: Correlation Constants Between the Adsorption Isothermssupporting

confidence: 78%

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Determination of the Frumkin and Temkin Adsorption Isotherms of Hydrogen at Nickel/Acidic and Alkaline Aqueous Solution Interfaces Using the Phase-Shift Method and Correlation Constants

Chun¹

2012

Journal of the Korean Electrochemical Society

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:The phase-shift method and correlation constants, which are unique electrochemical impedance spectroscopy techniques for studying the linear relationship between the phase shift (potential (E) behavior for the optimum intermediate frequency (f o ) and the fractional surface coverage (0 ≤ θ ≤ 1) vs. E behavior, are proposed and verified to determine the Frumkin, Langmuir, and Temkin adsorption isotherms and the related electrode kinetic and thermodynamic parameters. At Ni/0.5 M H 2 SO 4 and 0.1 M LiOH aqueous solution interfaces, the Frumkin and Temkin adsorption isotherms (θ vs. E) of H for the cathodic hydrogen (H 2 ) evolution, interaction parameters (g), equilibrium constants (K), standard Gibbs energies (∆G θ o ) of H adsorption, and rates of change (r) of ∆G θ o with θ have been determined using the phaseshift method and correlation constants. A lateral repulsive interaction (g > 0) between the adsorbed H species appears. The value of K in the alkaline aqueous solution is much greater than that in the acidic aqueous solution.

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Section: Correlation Constants Between the Adsorption Isothermssupporting

confidence: 78%

“…In our previously published papers, [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22] only Eq.…”

Section: Simplified Equivalent Circuit For the Phaseshift Methodsmentioning

confidence: 99%

Determination of the Frumkin and Temkin Adsorption Isotherms of Hydrogen at Nickel/Acidic and Alkaline Aqueous Solution Interfaces Using the Phase-Shift Method and Correlation Constants

Chun¹

2012

Journal of the Korean Electrochemical Society

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“…(1) was used with a footnote stating that C P practically includes C D (see Tables 1 and 2 in Ref. 20, Table 1 in Ref. 19, etc.).…”

Section: Theoretical and Experimental Backgrounds Of The Phase-shift mentioning

confidence: 99%

“…Thus, the tedious experimental procedures presented there [e.g. 13,16,[19][20][21]27] have been used to verify or confirm the validity and correctness of the phase-shift method. This is discussed in more detail in the section on theoretical and experimental backgrounds of the phase-shift method.…”

Section: Introductionmentioning

confidence: 99%

Developments in Electrochemistry: The Phase-Shift Method and Correlation Constants for Determining the Electrochemical Adsorption Isotherms at Noble and Highly Corrosion-Resistant Metal/Solution Interfaces

Chun¹,

Chun²

2012

Developments in Electrochemistry

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“…At first glance, it seems that there is no linear relationship between the (−ϕ vs. E) behavior for f o and the (θ vs. E) behavior at the interfaces. Thus, tedious experimental techniques and procedures [9][10][11][12][13] have been used to verify the validity and correctness of the phase-shift method. A new method must be rigorously tested, especially when it is unique, but only with pure logic and objectivity and through scientific procedures.…”

Section: Introductionmentioning

confidence: 99%

Review on the Determination of Frumkin, Langmuir, and Temkin Adsorption Isotherms at Electrode/Solution Interfaces Using the Phase-Shift Method and Correlation Constants

Chun¹,

Chun²

2016

Korean Chemical Engineering Research

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− This review article described the electrochemical Frumkin, Langmuir, and Temkin adsorption isotherms of over-potentially deposited hydrogen (OPD H) and deuterium (OPD D) for the cathodic H 2 and D 2 evolution reactions (HER, DER) at Pt, Ir, Pt-Ir alloy, Pd, Au, and Re/normal (H 2 O) and heavy water (D 2 O) solution interfaces. The Frumkin, Langmuir, and Temkin adsorption isotherms of intermediates (OPD H, OPD D, etc.) for sequential reactions (HER, DER, etc.) at electrode/solution interfaces are determined using the phase-shift method and correlation constants, which have been suggested and developed by Chun et al. The basic procedure of the phase-shift method, the Frumkin, Langmuir, and Temkin adsorption isotherms of OPD H and OPD D and related electrode kinetic and thermodynamic parameters, i.e., the fractional surface coverage (0 ≤ θ ≤ 1) vs. potential (E) behavior (θ vs. E), equilibrium constant (K), interaction parameter (g), standard Gibbs energy (∆G θ ○ ) of adsorption, and rate (r) of change of ∆G θ ○ with θ (0 ≤ θ ≤ 1), at the interfaces are briefly interpreted and summarized. The phase-shift method and correlation constants are useful and effective techniques to determine the Frumkin, Langmuir, and Temkin adsorption isotherms and related electrode kinetic and thermodynamic parameters (θ vs. E, K, g, ∆G θ ○ , r) at electrode/solution interfaces.

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Determination of adsorption isotherms of hydrogen and hydroxide at Pt–Ir alloy electrode interfaces using the phase-shift method and correlation constants

Cited by 18 publications

References 16 publications

Determination of the Frumkin and Temkin Adsorption Isotherms of Hydrogen at Nickel/Acidic and Alkaline Aqueous Solution Interfaces Using the Phase-Shift Method and Correlation Constants

Determination of the Frumkin and Temkin Adsorption Isotherms of Hydrogen at Nickel/Acidic and Alkaline Aqueous Solution Interfaces Using the Phase-Shift Method and Correlation Constants

Developments in Electrochemistry: The Phase-Shift Method and Correlation Constants for Determining the Electrochemical Adsorption Isotherms at Noble and Highly Corrosion-Resistant Metal/Solution Interfaces

Review on the Determination of Frumkin, Langmuir, and Temkin Adsorption Isotherms at Electrode/Solution Interfaces Using the Phase-Shift Method and Correlation Constants

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