Laser-induced deposition of Ni, Co-doped FeOOH cocatalysts on WO₃ photoanodes and elucidating their roles in water oxidation in terms of carrier dynamics

Abstract

Oxygen evolution cocatalysts (OECs) are frequently integrated with monoclinic WO3 photoanodes to improve their photoelectrochemical (PEC) water-splitting performance. In this study, we propose laser-induced catalyst deposition (LICD) for the deposition...

Ultrathin and Conformal TiOx Overlayers on WO3 Photoelectrodes for Simultaneous Surface Trap Passivation and Heterojunction Formation

“…Both the PL decay curves can be fitted by a biexponential model, using which an average lifetime of 1.99 ns is calculated for WO 3 -Ti-P, longer than that of WO 3 (1.57 ns) . Average lifetime in this work is longer than the value (0.59 ns) reported on WO 3 /NC-FeOOH in the literature . We understand this contradiction between PL intensity and lifetime to be the dual effects of surface trap passivation and heterojunction formation in the WO 3 -Ti-P photoanode. ,, …”

“…46 Average lifetime in this work is longer than the value (0.59 ns) reported on WO 3 / NC-FeOOH in the literature. 47 We understand this contradiction between PL intensity and lifetime to be the dual effects of surface trap passivation and heterojunction formation in the WO 3 -Ti-P photoanode. 43,46,48 Additionally, surface traps on the photoelectrode surface can induce Fermi-level pinning and result in photovoltage reduction.…”

Recent advances in vacuum- and laser-based fabrication processes for solar water-splitting cells

“…Kim et al employed laser-induced catalyst deposition (LICD) to deposit FeOOH and Ni- and Co-doped FeOOH cocatalysts onto WO 3 photoanodes. 96 By adjusting the elemental composition and combining Ni, Co, and Fe in the liquid precursor, Ni- and Co-doped FeOOH cocatalysts were effectively formed with a thickness of approximately 5 nm on the WO 3 photoanodes via LICD. The WO 3 photoanode featuring Ni- and Co-doped FeOOH cocatalysts demonstrated a photocurrent exceeding 3 mA cm −2 at 1.23 V ( vs. RHE).…”

Nonenzymatic Glucose Sensors Based on Nanoporous Copper Thin Films Fabricated by Laser-Induced Photoreduction

“…Lasers have been extensively employed in nanomaterial processing due to their various advantages like noncontact nature and spatially confined reaction. − Notably, laser processing can be utilized to cause photothermochemical reduction of metal oxide nanomaterials to obtain their corresponding metal nanomaterials. , For instance, Han et al introduced a groundbreaking laser-induced photoreduction (LIPR) process to recycle an oxidized Cu nanowire network, demonstrating its potential application as a monolithic heater . Despite these advancements, to the best of our knowledge, laser processing has not been previously utilized for synthesizing nanoporous CuTFs.…”