Fabrication of p-type silicon nanowire array based photoelectrodes for the efficient photoelectrocatalytic reduction of CO₂ to fuels and chemicals

Abstract

With the decrease of fossil resources and the large amount of CO2 emissions, the research on the preparation of fuels and chemicals using CO2 has been attracted wide attention. The...

Progress and perspectives on 1D nanostructured catalysts applied in photo(electro)catalytic reduction of CO2

“…However, LA and CVD are often limited by factors such as expensive preparation equipment and poor product morphology. 140 In recent years, MACE has been adopted by a large number of researchers. During this process, redox reactions occurred simultaneously on the surface of the Si plate.…”

Porous silicon-nanowire-based electrode for the photoelectrocatalytic production of hydrogen

“…4,5 Silicon is a promising light-harvesting material for photocathode because of its low cost, and suitable band gap and valence band potential towards the hydrogen evolution reaction (HER). 6 Nanostructured Si, like silicon nanowires (SiNWs), attracts great interest for incorporation in PEC cell, as SiNWs have both long optical paths for efficient light absorption and short charge transport distance to the catalyst, which ensures the collection of the photogenerated charge carriers before they recombine. [7][8][9][10] In addition, adjusting the SiNW diameter allows to tune the band gap, 11 and thus the part of sun-light that will be absorbed.…”

Single-atom nickel sites boosting Si nanowires for photoelectrocatalytic CO2 conversion with nearly 100% selectivity

“…Silicon nanowires (Si NWs), serving as one-dimensional nanostructures of p-Si, have emerged as promising photocathode materials, demonstrating superior photoresponse and enhanced charge separation and transport efficiency. 6 Modifying the catalytic promoter layer is an effective strategy to compensate for the insufficient CO 2 reduction activity of Si NWs. 7 Metal particles, such as Au, 8 Ag, 9 Pd, 10 and Sn, 11 have been anchored on the Si NW surface to enhance the CO 2 reduction activity.…”