Study on copper oxide stability in photoelectrochemical cell composed of nanostructured TiO2 and CuxO electrodes

Juodkazytė, Jurga; Šebeka, Benjaminas; Savickaja, Irena; Jagminas, Arūnas; Jasulaitienė, Vitalija; Selskis, A.; Kovger, Jelena; Mack, P.

doi:10.1016/j.electacta.2014.05.140

Cited by 26 publications

(11 citation statements)

References 33 publications

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“…S5, it can be seen that the 15T/C NPC exhibit high stability for PEC water reduction as compared to the CuO NPs alone. This maybe be due to the good separation of photogenerated charges in the 15T/C NPC, which would prevent from the photocorrosion [24].…”

Section: Photoelectrochemical Water Reduction Propertiesmentioning

confidence: 99%

Enhanced visible-light activities for PEC water reduction of CuO nanoplates by coupling with anatase TiO2 and mechanism

et al. 2015

Applied Surface Science

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Section: Photoelectrochemical Water Reduction Propertiesmentioning

confidence: 99%

Enhanced visible-light activities for PEC water reduction of CuO nanoplates by coupling with anatase TiO2 and mechanism

et al. 2015

Applied Surface Science

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“…At more negative potentials, the reduction of Cu 2 O to Cu proceeded, and this was the reason why the intensity of the bands indicated decreased significantly (see the spectra at E < 0.1 V in Figure 5a). The assignments of the CuO and Cu 2 O bands of the nanotextured surface was done following the earlier study of electrodes prepared by the same method [30], as well as literature data [31][32][33][34][35][36] and are summarized in Table A1; see Appendix A. The reason why the bands attributable to Cu 2 O were less prominent in the spectra recorded in the solution of 0.1 M KOH in heavy water was, most likely, related to the fact that these spectra were collected after the experiments in normal water, during which the majority of the CuO phase on the black-CuO substrate was reduced.…”

Section: Spectroelectrochemical Measurementsmentioning

confidence: 99%

Hydrogen Evolution on Nano-StructuredCuO/Pd Electrode: Raman Scattering Study

et al. 2019

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In this study, the processes taking place on the surfaces of nanostructured Cu/CuO and Cu/CuO/Pd electrodes at different potential, E, values in the solutions of 0.1 M KOH in H 2 O and D 2 O (heavy water) were probed by surface enhanced Raman spectroscopy (SERS), and the analysis of electrochemical reactions occurring under experimental conditions is presented. The bands of the SERS spectra of the Cu/CuO/Pd electrode observed in the range of E values from +0.3 V to 0 V (standard hydrogen electrode (SHE)) at 1328–1569 cm − 1 are consistent with the existence of species that are adsorbed or weakly bound to the surface with the energy of interaction close to 15–21 kJ mol − 1 . These bands can be attributed to the ad(ab)sorbed (H 3 O + ) ad , (H 2 + ) ab , and (H 2 + ) ad ions as intermediates in reversible hydrogen evolution and oxidation reactions (HER/HOR) taking place on the Cu/CuO/Pd electrode. There was no isotopic effect observed; this is consistent with the dipole nature of the electron-ion pair formation of adsorbed (H 3 O + ) ad and (H 2 + ) ad or (D 3 O + ) ad and (D 2 + ) ad . In accordance with the literature data, SERS bands at 125–146 cm − 1 and ∼520–565 cm − 1 were assigned to Cu(I) and Cu(II) oxygen species. These findings corroborate the quantitative stepwise mechanism of water reduction.

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“…The of the nanotextured surface was made following the earlier study of electrodes prepared by the same method [26] as well as literature data [27][28][29][30][31][32] and are summarized in Table A1, see the Supplement. The reason why the bands attributable to Cu 2 O are less prominent in the spectra recorded in the solution of 0.1 M KOH in heavy water is, most likely, related to the fact that, that these spectra were collected after the experiments in normal water, during which the majority of CuO phase on black-CuO substrate was reduced.…”

Section: Voltammetric Characterizationmentioning

confidence: 99%

Hydrogen Evolution on Nano-Structured CuO/Pd Electrode: Raman Scattering Study

Juodkazytė¹,

Juodkazis²,

Matulaitienė³

et al. 2019

Preprint

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In this study the processes taking place on the surfaces of nanostructurized Cu/CuO and Cu/CuO/Pd electrodes at different potential, $E$, values in the solutions of 0.1 M KOH in H$_2$O and D$_2$O (heavy water) were probed by the surface enhanced Raman spectroscopy (SERS) and analysis of electrochemical reactions occurring under experimental conditions is presented. Bands of the SERS spectra of Cu/CuO/Pd electrode observed in the range of $E$ values from +0.3~V to 0 V~(SHE) at 1328 - 1569~cm$^{-1}$ are consistent with the existence of species which are adsorbed or weakly bound to the surface with the energy of interaction close to 15 - 21~kJ mol$^{-1}$. These bands can be attributed to the ad(ab)sorbed (H$_3$O$^+$)$\rm{_{ad}}$, (H$_2^+$)$\rm{_{ab}}$ and (H$_2^+$)$\rm{_{ad}}$ ions as intermediates in reversible HER/HOR processes taking place on Cu/CuO/Pd electrode. There was no isotopic effect observed; this is consistent with a dipole nature of electron-ion pair formation of adsorbed (H$_3$O$^+$)$\rm{_{ad}}$ and (H$_2^+$)$\rm{_{ad}}$ or (D$_3$O$^+$)$\rm{_{ad}}$ and (D$_2^+$)$\rm{_{ad}}$. In accordance with literature data SERS bands at 125-146~cm$^{-1}$ and $\sim 520-565$~cm$^{-1}$ were assigned to Cu(I) and Cu(II) oxygen species. These findings corroborate the mechanism of cascading reduction of water.

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Study on copper oxide stability in photoelectrochemical cell composed of nanostructured TiO2 and CuxO electrodes

Cited by 26 publications

References 33 publications

Enhanced visible-light activities for PEC water reduction of CuO nanoplates by coupling with anatase TiO2 and mechanism

Enhanced visible-light activities for PEC water reduction of CuO nanoplates by coupling with anatase TiO2 and mechanism

Hydrogen Evolution on Nano-StructuredCuO/Pd Electrode: Raman Scattering Study

Hydrogen Evolution on Nano-Structured CuO/Pd Electrode: Raman Scattering Study

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