Publications by authors named "Rohini Subhash Kanase"
Article Synopsis
- Photoelectrochemical water splitting is becoming important for producing clean hydrogen fuel using sunlight, driven by concerns over fossil fuels and pollution.
- Silicon photocathodes are effective due to their light absorption abilities, but issues like low voltage and rapid corrosion limit their performance.
- This study explores a titanium nitride passivation layer and a molybdenum oxynitride cocatalyst to improve the stability and efficiency of silicon photocathodes, achieving a high onset potential and over 140 hours of stable operation under harsh conditions.
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.
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