In:
ChemPhotoChem, Wiley, Vol. 1, No. 5 ( 2017-05), p. 167-172
Abstract:
A photoelectrochemical (PEC) cell composed of an Al‐doped La 5 Ti 2 Cu 0.9 Ag 0.1 S 5 O 7 (Al‐LTCA) photocathode and a BaTaO 2 N (BTON) photoanode was employed for overall water splitting. The surface of the Al‐LTCA photocathode was modified first with CdS by a chemical bath treatment (CBT) and subsequently with TiO 2 and Pt (to form Pt/TiO 2 /CBT‐CdS/Al‐LTCA). The modified photocathode Pt/TiO 2 /CBT‐CdS/Al‐LTCA showed a significantly enhanced photocurrent for the PEC hydrogen evolution reaction in strongly alkaline aqueous phosphate solutions. This enhancement was attributed to surface stabilization by TiO 2 and to the enhanced charge separation caused by the formation of a p–n junction at the CBT‐CdS/Al‐LTCA interface. The BTON photoanode surface modified with Co and Ir species (Ir/Co/BTON) showed a lower onset potential than that of a Co‐loaded BTON photoanode for the PEC oxygen evolution reaction. A PEC cell incorporating the Pt/TiO 2 /CBT‐CdS/Al‐LTCA photocathode and the Ir/Co/BTON photoanode exhibited stoichiometric H 2 and O 2 generation. The solar‐to‐hydrogen energy conversion efficiency of this PEC cell was found to be 0.14 % following a minute of simulated sunlight irradiation.
Type of Medium:
Online Resource
ISSN:
2367-0932
,
2367-0932
DOI:
10.1002/cptc.201600015
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2881321-2