Reliable bi-functional nickel-phosphate /TiO₂ integration enables stable n-GaAs photoanode for water oxidation under alkaline condition.

ABSTRACT: Hydrogen is one of the most widely used essential chemicals worldwide, and it is also employed in the production of many other chemicals, especially carbon-free energy fuels produced via photoelectrochemical (PEC) water splitting. At present, gallium arsenide represents the most efficient photoanode material for PEC water oxidation, but it is known to either be anodically photocorroded or photopassivated by native metal oxides in the competitive reaction, limiting efficiency and stability. Here, we report chemically etched GaAs that is decorated with thin titanium dioxide (~30 nm-thick, crystalline) surface passivation layer along with nickel-phosphate (Ni-Pi) cocatalyst as a surface hole-sink layer. The integration of Ni-Pi bifunctional co-catalyst results in a highly efficient GaAs elect

SUBMITTER: Arunachalam M 

PROVIDER: S-EPMC10480475 | biostudies-literature | 2023 Sep

REPOSITORIES: biostudies-literature