title: Enhanced photoelectrochemical hydrogen production from silicon nanowire array photocathode.
abstract: Herein we report that silicon nanowires (SiNWs) fabricated via metal-catalyzed electroless etching yielded a photoelectrochemical hydrogen generation performance superior to that of a planar Si, which is attributed to a lower kinetic overpotential due to a higher surface roughness, favorable shift in the flat-band potential, and light-trapping effects of the SiNW surface. The SiNW photocathode yielded a photovoltage of 0.42 V, one of the highest values ever reported for hydrogen generation on p-type Si/electrolyte interfaces.
authors.affiliation: K.A.N.C., Suwon, Gyeonggi 443-270, Republic of Korea. ioh0204@gmail.com
authors.forename: Ilwhan
authors.initials: I
authors.lastname: Oh
authors.forename: Joohong
authors.initials: J
authors.lastname: Kye
authors.forename: Seongpil
authors.initials: S
authors.lastname: Hwang
mesh_terms: D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006859:Hydrogen / Q000737:chemistry* / Q000302:isolation & purification; D008027:Light; D008422:Materials Testing; D012825:Silicon / Q000737:chemistry* / Q000528:radiation effects*; D014025:Titanium / Q000737:chemistry*
chemical_list: C009495:titanium dioxide; D006859:Hydrogen; D014025:Titanium; D012825:Silicon