Ir 전극 계면에서 위상이동 방법 및 상관계수를 이용한 수소의 흡착등온식 결정
Determination of Adsorption Isotherms of Hydrogen at an Ir Electrode Interface Using the Phase-Shift Method and Correlation Constants
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Abstract
The phase-shift method and correlation constants for studying a linear relationship between the behavior( vs. E) of the phase shift (0o≤≤90o) for the optimum intermediate frequency and that (θ vs. E) of the frac-tional surface coverage (1 ≥θ≥0) have been proposed and verified to determine the Langmuir, Frumkin, and Temkinadsorption isotherms (θ vs. E) at noble metal/aqueous electrolyte interfaces. At an Ir/0.1 M KOH aqueous electrolyteinterface, the Langmuir and Temkin adsorption isotherms (θ vs. E), equilibrium constants (K=3.3× 104 mol1 forthe Langmuir and K=3.3× 103exp(4.6θ) mol1 for the Temkin adsorption isotherm), interaction parameter (g = 4.6for the Temkin adsorption isotherm), and standard free energies (. Gads0= 19.9 kJ mol1 for K=3.3× 104 mol1 and16.5< . Gθ0< 23.3 kJ mol1 for K= 3.3× 103exp(4.6θ) mol1 and 0.2< θ< 0.8) of H for the cathodic H2 evo-lution reaction are determined using the phase-shift method and correlation constants. The inhomogeneous and lateralinteraction effects on the adsorption of H are negligible. At the intermediate values of θ, i.e., 0.2< θ< 0.8, theTemkin adsorption isotherm (θ vs. E) corelating with the Langmuir or the Frumkin adsorption isotherm (θ vs. E),and vice versa, is readily determined using the corelation constants. The phase-shift method and correlation constantsare accurate and reliable techniques to determine the adsorption isotherms (θ vs. E) and related electrode kineticand thermodynamic parameters (K, g, . Gads0, . Gθ0).
참고문헌 (23)
- "Electrochemistry andmaterials science of cathodic hydrogen absorption and adsorption" (1995), The Electrochemical Society, Pennington, NJ
- "Hydrogen sorption at", in electrodes, 1998, pp.57, 137~
- "Modernelectrochemistry”, 2nd Ed", 2A, pp.1193~ (2000), Kluwer Academic[DOI]
- "Hydrogen atSurface and Interfaces" (2000), The Electrochemical Society,Pennington, NJ
- "The phase-shift method for the Frumkinadsorption isotherms at the Pd", H2SO4 and KOH solution interfaces, 1998, pp.145, 3794~
- "Hydrogen at surface and interfaces" (2000), The Electrochemical Society, Pennington, NJ
- "The Langmuir adsorptionisotherms of electroadsorbed hydrogens for the cathodic hydrogenevolution reactions at the Pt(100)", H2SO4 and LiOH aqueouselectrolyte interfaces, 2001, pp.26, 941~
- "The phase-shift method forthe Langmuir adsorption isotherms of electroadsorbed H for thecathodic H2 evolution reactions at the poly-Pt electrode interfaces", 5, pp.131~ (2002)
- "Qualitative analysis of theFrumkin adsorption isotherm of the over-potentially depositedhydrogen at the poly-Ni", KOH aqueous electrolyte interface using thephase-shift method, 2002, pp.149, E325~
- "Langmuir adsorptionisotherms of over-potentially deposited hydrogen at poly-Au and Rh", H2SO4 aqueous electrolyte interfaces: Qualitative analysis using thephase-shift method, 2003, pp.150, E207~
- "Determination of the equilibriumconstant and standard free energy of the over-potentially depositedhydrogen for the cathodic H2 evolution reaction at the Pt-Rh alloyelectrode interface using the phase-shift method", 28, pp.1333~ (2003)
- "Methods for estimating adsorption isotherms inelectrochemical systems", 6613218 (2003)
- "Constant correlationconstants between Temkin and Langmuir or Frumkin adsorptionisotherms at poly-Pt, Re, and Ni", aqueous electrolyte interfaces, 2004, pp.7, 194~
- "Determinationof the Langmuir adsorption isotherms of under- and over-potentiallydeposited hydrogen for the cathodic H2 evolution reaction at poly-Ir", aqueous electrolyte interfaces using the phase-shift method, 2005, pp.30, 247~
- "The phase-shiftmethod for determining Langmuir adsorption isotherms of overpotentiallydeposited hydrogen for the cathodic H2 evolution reactionat poly-Re", aqueous electrolyte interfaces, 2005, pp.30, 485~
- "The phase-shiftmethod for determining Langmuir and Temkin adsorption isothermsof over-potentially deposited hydrogen for the cathodic H2 evolutionreaction at the poly-Pt", H2SO4 aqueous electrolyte interface, 2005, pp.30, 1423~
- "The phase-shift method for determiningadsorption isotherms of hydrogen in electrochemical systems", 31, pp.277~ (2006)
- "Determination of theLangmuir and Temkin adsorption isotherms of H for the cathodic H2evolution reaction at a Pt", KOH solution interface using the phaseshiftmethod, 2006, pp.9, 19~
- "The phase-shift method andcorrelation constants for determining adsorption isotherms ofhydrogen at a palladium electrode interface", 32 (2007), in press
- "Comment on ‘Langmuiradsorption isotherms of over-potentially deposited hydrogen at poly-Au and Rh", H2SO4 aqueous electrolyte interfaces; Qualitativeanalysis using the phase-shift method, J Electrochem Soc 150 (2003)140 J. Korean Electrochem. Soc., Vol. 10, No. 2, 2007E207-217, 2004, pp.151, L9~
- "Comments on ‘The phase-shift method for determiningLangmuir adsorption isotherms of over-potentially depositedhydrogen for the cathodic H2 evolution reaction at poly-Re", aqueouselectrolyte interfaces, Hydrogen Energy 30 (2005) 485-499, 2005, pp.30, 913~
- "Response to comment on‘Langmuir adsorption isotherms of over-potentially depositedhydrogen at poly-Au and Rh", H2SO4 aqueous electrolyte interfaces;Qualitative analysis using the phase-shift method, J Electrochem Soc150 (2003) E207, 2004, pp.151, L11~
- "Response tocomments on ‘The phase-shift method for determining Langmuiradsorption isotherms of over-potentially deposited hydrogen for thecathodic H2 evolution reaction at poly-Re", aqueous electrolyteinterfaces, Hydrogen Energy 30 (2005) 485-499, 2005, pp.30, 919~