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Overall Photoelectrochemical Water Splitting using Tandem Cell under Simulated Sunlight
Author(s) -
Kim Jin Hyun,
Kaneko Hiroyuki,
Minegishi Tsutomu,
Kubota Jun,
Domen Kazunari,
Lee Jae Sung
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201501401
Subject(s) - photocathode , tandem , water splitting , sunlight , photoelectrochemical cell , electrolyte , hydrogen , degradation (telecommunications) , materials science , chemistry , chemical engineering , photochemistry , photocatalysis , catalysis , electrode , optics , telecommunications , biochemistry , physics , organic chemistry , quantum mechanics , computer science , composite material , engineering , electron
A stand‐alone photoelectrochemical (PEC) water‐splitting system driven only by sunlight was demonstrated with a tandem‐scheme of Pt/CdS/CuGa 3 Se 5 /(Ag,Cu)GaSe 2 photocathode and NiOOH/FeOOH/Mo:BiVO 4 photoanode in a neutral phosphate buffer solution as an electrolyte. The as‐prepared semi‐transparent Mo:BiVO 4 layer allows sunlight to pass through the top photoanode and reach the bottom photocathode. Consequently, the tandem cell showed stoichiometric hydrogen and oxygen evolution with a solar‐to‐hydrogen (STH) conversion efficiency of 0.67 % over 2 h without degradation. The stability and STH efficiency are the highest among similar configuration of PEC tandem cells.