Fabrication of CuBi2O4 photocathode through novel anodic electrodeposition for solar hydrogen production

Glassy carbon/multi walled carbon nanotube/cadmium sulphide photoanode for light energy storage in vanadium photoelectrochemical cell

“…5b which does not present any photoanodic current. Also, in this experiment any photocurrent decline, which usually indicates photocorrosin [46], is not observed when light is on over 35 min (Fig. 5a).…”

Photocatalytic Carbon Dioxide Reduction at p‐Type Copper(I) Iodide

“…The negative slope of the plot provest he p-type nature of the recrystallized CuI photocatalyst.T he flat-band potentiali sc lose to the potential of the upper edge of valence band for p-type semiconductors [37] and is equal to 0.78 Vv ersusS CE (1.02 Vv s. NHE). The negative slope of the plot provest he p-type nature of the recrystallized CuI photocatalyst.T he flat-band potentiali sc lose to the potential of the upper edge of valence band for p-type semiconductors [37] and is equal to 0.78 Vv ersusS CE (1.02 Vv s. NHE).…”

Efficient Solar‐Assisted O2 Reduction Using a Cofacial Iron Porphyrin Dimer Catalyst Integrated into a p‐CuBi2O4 Photocathode

“…A promising recently reported polyterthiophene (pTTh) photocathode showed a photocurrent density for solar‐assisted O 2 reduction of 1.2 mA cm −2 , however the photocurrent is measured at 1600 rpm and under 300 mW cm −2 illumination, although it showed a remarkably high positive onset potential (1.34 V) . A remarkably efficient Ag doped p‐CuBi 2 O 4 photocathode prepared by electrodeposition/annealing method and modified with the precious Pt catalyst showed a stable photocurrent density of about 1.3 mA cm −2 at 0.6 V in an O 2 ‐saturated 0.1 m NaOH under AM 1.5G, 100 mW cm −2 illumination …”

“…Recently, CuBi 2 O 4 immobilized on FTO electrode has been emerged as a promising p‐type photocathode for energy storing and conversion processes due to its convenient band gap energy ( E g =1.5–1.8 eV) for absorbing a substantial portion of visible energy, its suitable conduction band minimum (CBM) and valence band maximum (VBM) energies, and its construction from earth abundant materials. Indeed, the CBM and VBM of CuBi 2 O 4 are located at more negative and more positive potentials than the thermodynamic water reduction and oxidation potentials, respectively, enabling solar‐driven water reduction . ORR is thermodynamically much easier than water reduction and using FTO/CuBi 2 O 4 photocathode modified with a suitable O 2 reduction catalyst, as the current Fe 2 TPFPP‐TMP is a promising approach to achieve solar‐assisted ORR.…”