02009naa a2200265 a 450000100080000000500110000800800410001902200140006002400600007410000200013424502020015426000090035652011250036565300250149065300230151565300190153870000200155770000260157770000180160370000130162170000160163470000170165070000220166777300540168921413392024-01-24       2022    bl uuuu     u00u1 u    #d  a0025-54087 ahttps://doi.org/10.1016/j.materresbull.2021.1117162DOI1 aOLIVEIRA, J. A.  aCopper vanadatesbTargeted synthesis of two pure phases and use in a photoanode/cathode setup for selective photoelectrochemical conversion .of carbon dioxide to liquid fuel.h[electronic resource]  c2022  aDurable photocathodes are a matter of crucial concern in photoelectrochemical (PEC) CO2 reduction and a photoanode/dark cathode configuration is a viable strategy to circumvent this stability issue. In this vein, this study addresses a literature gap related to emerging photoelectrode materials for solar fuels generation. First is the perennial problem of securing a pure phase in the ternary copper vanadate (Cu-V-O) family of inorganic semiconductors. An optimized synthesis route was developed to prepare two copper vanadates with distinct morphological and optical properties. The copper site valence in the precursor influenced the semiconductor composition type: a Cu(II) source led to n-type β-Cu2V2O7 while employing a Cu(I) source and an inert, deoxygenated environment, p-type α-CuVO3 was obtained. The α-CuVO3 photoelectrode was unstable and easily converted to β-Cu2V2O7. Therefore, only the PEC performance of β-Cu2V2O7 towards CO2 reduction was evaluated in this study, demonstrating that mainly methanol (generation flux: ~236 μmol cm-2 h− 1 ) was selectively formed.  aCatalytic properties  aChemical synthesis  aNanostructures1 aSILVA, R. R. M.1 aSILVA, G. T. S. T. da1 aTORRES, J. A.1 aVALI, A.1 aRIBEIRO, C.1 aKRISHNAN, R.1 aRUOTOLO, L. A. M.  tMaterials Research Bulletin, v 149, 111716, 2022.