A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting. Kawde, A., Annamalai, A., Sellstedt, A., Glatzel, P., Wågberg, T., & Messinger, J. Dalton Transactions, 48(4):1166–1170, 2019. ![A microstructured p-Si photocathode outcompetes Pt as a counter electrode to hematite in photoelectrochemical water splitting [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO 2 /NiO x ) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting. , Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO 2 /NiO x ) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the “Z”-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density ( J ph ) for pristine α-Fe 2 O 3 and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO 2 /NiO x photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm −2 at 1.23 V RHE represents a new record performance for hydrothermally grown pristine α-Fe 2 O 3 nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe 2 O 3 or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe 2 O 3 .
@article{kawde_microstructured_2019,
title = {A microstructured p-{Si} photocathode outcompetes {Pt} as a counter electrode to hematite in photoelectrochemical water splitting},
volume = {48},
issn = {1477-9226, 1477-9234},
url = {http://xlink.rsc.org/?DOI=C8DT03653E},
doi = {10.1039/C8DT03653E},
abstract = {Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting.
,
Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO
2
/NiO
x
) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the “Z”-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60\% increase in the photocurrent density (
J
ph
) for pristine α-Fe
2
O
3
and a 77\% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO
2
/NiO
x
photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm
−2
at 1.23
V
RHE
represents a new record performance for hydrothermally grown pristine α-Fe
2
O
3
nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe
2
O
3
or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe
2
O
3
.},
language = {en},
number = {4},
urldate = {2021-06-07},
journal = {Dalton Transactions},
author = {Kawde, Anurag and Annamalai, Alagappan and Sellstedt, Anita and Glatzel, Pieter and Wågberg, Thomas and Messinger, Johannes},
year = {2019},
pages = {1166--1170},
}
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The proposed photoelectrochemical (PEC) water-splitting device mimics the “Z”-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60% increase in the photocurrent density ( J ph ) for pristine α-Fe 2 O 3 and a 77% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO 2 /NiO x photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm −2 at 1.23 V RHE represents a new record performance for hydrothermally grown pristine α-Fe 2 O 3 nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe 2 O 3 or by its decoration with co-catalysts. Electrochemical impedance spectroscopy measurements suggest that this significant performance increase is due to the enhancement of the space-charge field in α-Fe 2 O 3 .","language":"en","number":"4","urldate":"2021-06-07","journal":"Dalton Transactions","author":[{"propositions":[],"lastnames":["Kawde"],"firstnames":["Anurag"],"suffixes":[]},{"propositions":[],"lastnames":["Annamalai"],"firstnames":["Alagappan"],"suffixes":[]},{"propositions":[],"lastnames":["Sellstedt"],"firstnames":["Anita"],"suffixes":[]},{"propositions":[],"lastnames":["Glatzel"],"firstnames":["Pieter"],"suffixes":[]},{"propositions":[],"lastnames":["Wågberg"],"firstnames":["Thomas"],"suffixes":[]},{"propositions":[],"lastnames":["Messinger"],"firstnames":["Johannes"],"suffixes":[]}],"year":"2019","pages":"1166–1170","bibtex":"@article{kawde_microstructured_2019,\n\ttitle = {A microstructured p-{Si} photocathode outcompetes {Pt} as a counter electrode to hematite in photoelectrochemical water splitting},\n\tvolume = {48},\n\tissn = {1477-9226, 1477-9234},\n\turl = {http://xlink.rsc.org/?DOI=C8DT03653E},\n\tdoi = {10.1039/C8DT03653E},\n\tabstract = {Herein we demonstrate that an earth-abundant semiconductor photocathode (p-Si/TiO\n 2\n /NiO\n x\n ) out-competes rare and expensive Pt as counter electrode to Fe-oxide for overall photoelectrochemical water splitting.\n \n , \n \n Herein, we communicate about an Earth-abundant semiconductor photocathode (p-Si/TiO\n 2\n /NiO\n x\n ) as an alternative for the rare and expensive Pt as a counter electrode for overall photoelectrochemical water splitting. The proposed photoelectrochemical (PEC) water-splitting device mimics the “Z”-scheme observed in natural photosynthesis by combining two photoelectrodes in a parallel-illumination mode. A nearly 60\\% increase in the photocurrent density (\n J\n ph\n ) for pristine α-Fe\n 2\n O\n 3\n and a 77\\% increase in the applied bias photocurrent efficiency (ABPE) were achieved by replacing the conventionally used Pt cathode with an efficient, cost effective p-Si/TiO\n 2\n /NiO\n x\n photocathode under parallel illumination. The resulting photocurrent density of 1.26 mA cm\n −2\n at 1.23\n V\n RHE\n represents a new record performance for hydrothermally grown pristine α-Fe\n 2\n O\n 3\n nanorod photoanodes in combination with a photocathode, which opens the prospect for further improvement by doping α-Fe\n 2\n O\n 3\n or by its decoration with co-catalysts. 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