Tuning the C /C Selectivity of Electrochemical CO Reduction on Cu-CeO Nanorods by Oxidation State Control.

Ceria (CeO ) is one of the most extensively used rare earth oxides. Recently, it has been used as a support material for metal catalysts for electrochemical energy conversion. However, to date, the nature of metal/CeO interfaces and their impact on electrochemical processes remains unclear.

Direct Identification of Antisite Cation Intermixing and Correlation with Electronic Conduction in CuBiO for Photocathodes.

Cu-based p-type semiconducting oxides have been sought for water-reduction photocathodes to enhance the energy-conversion efficiency in photoelectrochemical cells. CuBiO has recently attracted notable attention as a new family of p-type oxides, based on its adequate band gap. Although the identification of a major defect structure should be the first step toward understanding the electronic conduction behavior, no direct experimental analysis has been carried out yet.

Template Engineering of CuBi O Single-Crystal Thin Film Photocathodes.

To develop strategies for efficient photo-electrochemical water-splitting, it is important to understand the fundamental properties of oxide photoelectrodes by synthesizing and investigating their single-crystal thin films. However, it is challenging to synthesize high-quality single-crystal thin films from copper-based oxide photoelectrodes due to the occurrence of significant defects such as copper or oxygen vacancies and grains. Here, the CuBi O (CBO) single-crystal thin film photocathode is achieved using a NiO template layer grown on single-crystal SrTiO (STO) (001) substrate via pulsed laser deposition.

Long-term stabilized high-density CuBiO/NiO heterostructure thin film photocathode grown by pulsed laser deposition.

Harvesting sustainable hydrogen through water-splitting requires a durable photoelectrode to achieve high efficiency and long lifetime. Dense, uniform CuBiO/NiO thin film photocathodes grown by pulsed laser deposition achieved photocurrent density over 1.5 mA cm at 0.

Formation of high-density CuBiO thin film photocathodes with polyvinylpyrrolidone-metal interaction.

We present a polymer-assisted spin coating process used to fabricate high-density p-type CuBiO (CBO) thin films. Polyvinylpyrrolidone (PVP) is introduced in the precursor solutions in order to promote uniform nucleation of CBO and prevent formation of the secondary phase, such as BiO by Bi ion hydrolysis. Slow PVP molecule decomposition during the two-step annealing process, with a 1 M/0.