An Unassisted Tandem Photoelectrochemical Cell Based on p- and n-Cu2O Photoelectrodes

By investigating photoelectrochemical (PEC) performance of p and n-type Cu 2 O, we do an exploratory study on dual-photoelectrode tandem PEC cell consisting of p-Cu 2 O/Pt photocathode and n-Cu 2 O/Co–Pi photoanode for the first time. Benefiting from electron capture (Pt) and hole transfer (Co–Pi) l...

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Veröffentlicht in:	Catalysis letters 2021-07, Vol.151 (7), p.1976-1983
Hauptverfasser:	Wang, Pan, Liu, Zhifeng, Chen, Dong, Zhang, Shaoce, Fang, Guozhen, Han, Changcun, Cheng, Zhengwang, Tong, Zhengfu
Format:	Artikel
Sprache:	eng
Schlagworte:	Beta decay Catalysis Charge efficiency Charge transfer Chemistry Chemistry and Materials Science Cobalt Copper oxides Electron capture Energy conversion Industrial Chemistry/Chemical Engineering Organometallic Chemistry Photocathodes Photoelectric effect Photoelectric emission Photoelectrochemical devices Physical Chemistry Platinum Water splitting
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Zusammenfassung:	By investigating photoelectrochemical (PEC) performance of p and n-type Cu 2 O, we do an exploratory study on dual-photoelectrode tandem PEC cell consisting of p-Cu 2 O/Pt photocathode and n-Cu 2 O/Co–Pi photoanode for the first time. Benefiting from electron capture (Pt) and hole transfer (Co–Pi) layers, the photoelectrodes have better charge separation efficiency and faster charge transfer kinetics. The p-Cu 2 O/Pt\|\|n-Cu 2 O/Co–Pi PEC cell finally achieves an unassisted photocurrent density of 0.09 mA/cm 2 after illumination for 1000 s, which preliminarily confirms the viewpoint of unassisted overall water splitting. We then anticipate this work can provide a novel platform for the design and fabrication of various PEC energy conversion devices with excellent performance. Graphic Abstract
ISSN:	1011-372X 1572-879X
DOI:	10.1007/s10562-020-03483-7