Electrochemistry of nitronyl and imino nitroxides

Budnikova, Yu. G.; Gryaznova, T. V.; Kadirov, Marsil K.; Tretyakov, Eugene V.; Kholin, Kirill V.; Ovcharenko, V. V.; Sagdeev, R. Z.; Sinyashin, Оleg G.

doi:10.1134/s0036024409110284

Cited by 20 publications

(17 citation statements)

References 23 publications

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“…The value of the half-wave potential E 00 ¼ 681 mV of the oxoammonium cation formation (Scheme 2) is comparable with the data for other reversibly oxidized nitronyl nitroxides. 12,26 The imino nitroxide [(INCp)Re(CO) 3 ] is oxidized irreversibly (Fig. 1); its oxidation potential is 557 mV higher than that of [(NNCp)Re(CO) 3 ], which could be associated with a much higher electron transfer energy and lower stability of the primary oxidation product (Scheme 2).…”

Section: Resultsmentioning

confidence: 99%

Re(i)-nitroxide complexes

et al. 2021

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Section: Resultsmentioning

confidence: 99%

Re(i)-nitroxide complexes

et al. 2021

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“…ESR proved to be an effective methodf or the exact magnetic resonance identification of free radicals [24,25] and transition metal ions in solutions, [26] for studies of classical micellar solutions of surfactants, [27] amphiphilic calix [4]arenes, [28] andf or intermediates of ESR electrochemical transformations. [29][30][31][32][33][34][35] In order to study the nature of the reduced forms of the catalytic complex the complex was studied using ESR during reduction by molecular hydrogen and the electrochemical reduction at the potential of the first peak. Figure 2D (Table 2).…”

Section: Resultsmentioning

confidence: 99%

Organometallic Polymer Electrolyte Membrane Fuel Cell Bis‐Ligand Nickel(Ii) Complex of 1,5‐Di‐P‐Tolyl‐3,7‐Dipyridine‐1,5,3,7‐Diazadiphosphacyclo‐Octane Catalyst

et al. 2018

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A 1,4‐Diaza‐3.7‐diphosphacyclo‐otane organometallic bis‐ligand nickel(II) complex [Ni(PPy2Np‐Tol2)2]2+2.[BF4]− on Vulcan XC‐72 (C) functions as both the cathode and anode catalysts in polymer electrolyte membrane fuel cell (PEMFC). In a PEMFC using Ni(Py‐p‐Tol)/C at the anode and Pt/C at the cathode the power density is shown to reach 14.66 mW cm−2, which is the highest power density of the none‐noble organometallic analogs. Based on the data produced using independent physico‐chemical methods, the mechanisms of the hydrogen oxidation and oxygen reduction reactions (HOR and ORR) on the anode and cathode sides of PEMFC, respectively, are reported.

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“…Electrochemical measurements were taken on a BASi Epsilon EClipse electrochemical analyzer (2701 Kent Avenue, West Lafayette, IN 47906, USA). A conventional three-electrode system [ 52 , 53 , 54 ] was used with glassy carbon as the working electrode, the Ag/AgCl (3 M KCl aqueous solution) electrode as the reference electrode, and a Pt wire as the counter electrode. The pH of solutions undergoing electrochemical studies was maintained with 0.1 M sodium phosphate buffer Na 2 HPO 4 /NaH 2 PO 4 (pH = 7).…”

Section: Methodsmentioning

confidence: 99%

A Water-Soluble Sodium Pectate Complex with Copper as an Electrochemical Catalyst for Carbon Dioxide Reduction

et al. 2021

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A selective noble-metal-free molecular catalyst has emerged as a fruitful approach in the quest for designing efficient and stable catalytic materials for CO2 reduction. In this work, we report that a sodium pectate complex of copper (PG-NaCu) proved to be highly active in the electrocatalytic conversion of CO2 to CH4 in water. Stability and selectivity of conversion of CO2 to CH4 as a product at a glassy carbon electrode were discovered. The copper complex PG-NaCu was synthesized and characterized by physicochemical methods. The electrochemical CO2 reduction reaction (CO2RR) proceeds at −1.5 V vs. Ag/AgCl at ~10 mA/cm2 current densities in the presence of the catalyst. The current density decreases by less than 20% within 12 h of electrolysis (the main decrease occurs in the first 3 h of electrolysis in the presence of CO2). This copper pectate complex (PG-NaCu) combines the advantages of heterogeneous and homogeneous catalysts, the stability of heterogeneous solid materials and the performance (high activity and selectivity) of molecular catalysts.

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Electrochemistry of nitronyl and imino nitroxides

Cited by 20 publications

References 23 publications

Re(i)-nitroxide complexes

Re(i)-nitroxide complexes

Organometallic Polymer Electrolyte Membrane Fuel Cell Bis‐Ligand Nickel(Ii) Complex of 1,5‐Di‐P‐Tolyl‐3,7‐Dipyridine‐1,5,3,7‐Diazadiphosphacyclo‐Octane Catalyst

A Water-Soluble Sodium Pectate Complex with Copper as an Electrochemical Catalyst for Carbon Dioxide Reduction

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