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Volumn 129, Issue 20, 2007, Pages 6654-6661

Reactivity of platinum metal with organic radical anions from metal to negative oxidation states

Author keywords

[No Author keywords available]

Indexed keywords

DIMETHYLFORMAMIDE; ELECTROCHEMISTRY; MOLECULAR STRUCTURE; NEGATIVE IONS; OXIDATION; PHASE TRANSITIONS; REACTION KINETICS;

EID: 34249060689     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja071483a     Document Type: Article
Times cited : (37)

References (49)
  • 7
    • 34249105810 scopus 로고    scopus 로고
    • Solid phases were obtained upon cathodic reduction of various metals, in nonaqueous solvents containing organic or inorganic background electrolytes according to some complicated reduction processes involving the electrode material, (a) Tomashova, N. N.; Kiseleva, I. G.; Astakhov, I. I.; Kabanov, B. N. Elektrokhimiya 1968, 4, 471.
    • Solid phases were obtained upon cathodic reduction of various metals, in nonaqueous solvents containing organic or inorganic background electrolytes according to some complicated reduction processes involving the electrode material, (a) Tomashova, N. N.; Kiseleva, I. G.; Astakhov, I. I.; Kabanov, B. N. Elektrokhimiya 1968, 4, 471.
  • 36
    • 0003853137 scopus 로고    scopus 로고
    • Bard, A. J, Mirkin, M. V, Eds, Marcel Dekker: New York
    • Scanning Electrochemical Microscopy; Bard, A. J., Mirkin, M. V., Eds.; Marcel Dekker: New York, 2001.
    • (2001) Scanning Electrochemical Microscopy
  • 42
    • 34249003016 scopus 로고    scopus 로고
    • -. The addition of this reaction with the reaction III results in reaction II, which is related to the regeneration of the mediator at the Pt substrate. The possibility of the occurrence of reaction III′ could explain the presence of the regeneration of the mediator above the modified area, and confirm that total negative feedback after the platinum reduction is not observed.
    • -. The addition of this reaction with the reaction III results in reaction II, which is related to the regeneration of the mediator at the Pt substrate. The possibility of the occurrence of reaction III′ could explain the presence of the regeneration of the mediator above the modified area, and confirm that total negative feedback after the platinum reduction is not observed.
  • 44
    • 34249058691 scopus 로고    scopus 로고
    • The kinetics of the transfer can be characterized by measuring the apparent electron transfer rate constant ke1 using the formalism previously introduced by Mirkin and Bard. When interfacial electron transfer at the substrate/solution is the rate determining step, the normalized current IT could be described by the following set of equations: IT, Isk(1, ITins/ITc, ITins, ITins, 0.15, 1.5358/L, 0.58 exp(-1.14L, 0.0908 exp(L, 6.3/1.017L, 1, and ITc, 0.68, 0.78377/L, 0.3315 exp-1.0672/L, where IT c, Isk and IT ins are, respectively, the normalized current tip for the diffusion-controlled regeneration, for the k
    • k = 0.78377/(L(1 + 1/Λ)) + [0.68 + 0.3315 exp(-1.0672/L)/ (1 + F(L,Λ))] with F(L,Λ) = (11 + 7.3Λ)/(Λ(110 - 40L)) and Λ = κL.
  • 45
    • 0020746096 scopus 로고    scopus 로고
    • The sample involves numerous Pt pallets that are active sites with small size as compared to the diffusion layer dimensions. Under this condition, the electrochemical response of the system is the same as compared with an unblocked substrate, but with a decrease of the standard electron-transfer rate constant by a ratio k′e1, ke11, φ, where φ is the fractional coverage of the electrode By the blocking holes. Considering that the standard rate constant of the nitrobenzene/nitrobenzene radical anion is around 0.2 cm·s-1, we derived a value of φ around 0.45 that is reasonable regarding the topography of our substrate. Amatore, C, Saveant, J.-M, Tessier, D. J. Electroanal. Chem. 1983, 147, 39
    • -1, we derived a value of φ around 0.45 that is reasonable regarding the topography of our substrate. Amatore, C.; Saveant, J.-M.; Tessier, D. J. Electroanal. Chem. 1983, 147, 39.
  • 46
    • 34249079106 scopus 로고    scopus 로고
    • For the less negative mediators, the transient corresponds to a change in the diffusion regime of the ultramicroelectrode related to the geometry of the SECM
    • For the less negative mediators, the transient corresponds to a change in the diffusion regime of the ultramicroelectrode related to the geometry of the SECM.
  • 48
    • 34249067913 scopus 로고    scopus 로고
    • The reduction of Teflon to reduced carbon corresponds to the passage from insulating materials to conducting materials which is the inverse of our system. Despite this difference and a completely different chemistry, the general concept presented by C. Amatore et al. in reference 25b is the same than in our experimental situation.25b
    • 25b


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.