Engineering Surface Architectures for Improved Durability in III-V Photocathodes.

Autor: Ben-Naim M; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.; SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States., Aldridge CW; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Steiner MA; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Britto RJ; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.; SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States., Nielander AC; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.; SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States., King LA; Manchester Fuel Cell Innovation Centre, Manchester Metropolitan University, Manchester, M1 5GD, United Kingdom., Deutsch TG; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Young JL; Chemistry and Nanoscience Center, National Renewable Energy Laboratory, Golden, Colorado 80401, United States., Jaramillo TF; Department of Chemical Engineering, Stanford University, Stanford, California 94305, United States.; SUNCAT Center for Interface Science and Catalysis, Stanford University, Stanford, California 94305, United States.
Jazyk: angličtina
Zdroj: ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2022 May 11; Vol. 14 (18), pp. 20385-20392. Date of Electronic Publication: 2022 Jan 10.
DOI: 10.1021/acsami.1c18938
Abstrakt: GaInP 2 has shown promise as the wide bandgap top junction in tandem absorber photoelectrochemical (PEC) water splitting devices. Among previously reported dual-junction PEC devices with a GaInP 2 top cell, those with the highest performance incorporate an AlInP 2 window layer (WL) to reduce surface recombination and a thin GaInP 2 capping layer (CL) to protect the WL from corrosion in electrolytes. However, the stability of these III-V systems is limited, and durability continues to be a major challenge broadly in the field of PEC water splitting. This work provides a systematic investigation into the durability of GaInP 2 systems, examining the impacts of the window layer and capping layer among single junction pn-GaInP 2 photocathodes coated with an MoS 2 catalytic and protective layer. The photocathode with both a CL and WL demonstrates the highest PEC performance and longest lifetime, producing a significant current for >125 h. In situ optical imaging and post-test characterization illustrate the progression of macroscopic degradation and chemical state. The surface architecture combining an MoS 2 catalyst, CL, and WL can be translated to dual-junction PEC devices with GaInP 2 or other III-V top junctions to enable more efficient and stable PEC systems.
Databáze: MEDLINE
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