Photo-electrochemical hydrogen production from neutral phosphate buffer and seawater using micro-structured p-Si photo-electrodes functionalized by solution-based methods. Kawde, A., Annamalai, A., Amidani, L., Boniolo, M., Kwong, W. L., Sellstedt, A., Glatzel, P., Wågberg, T., & Messinger, J. Sustainable Energy & Fuels, 2(10):2215–2223, 2018. ![Photo-electrochemical hydrogen production from neutral phosphate buffer and seawater using micro-structured p-Si photo-electrodes functionalized by solution-based methods [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Micro-structured p-Si/TiO 2 /NiO x allows for efficient photoelectrochemical H 2 production from seawater. , Solar fuels such as H 2 generated from sunlight and seawater using earth-abundant materials are expected to be a crucial component of a next generation renewable energy mix. We herein report a systematic analysis of the photo-electrochemical performance of TiO 2 coated, microstructured p-Si photo-electrodes (p-Si/TiO 2 ) that were functionalized with CoO x and NiO x for H 2 generation. These photocathodes were synthesized from commercial p-Si wafers employing wet chemical methods. In neutral phosphate buffer and standard 1 sun illumination, the p-Si/TiO 2 /NiO x photoelectrode showed a photocurrent density of −1.48 mA cm −2 at zero bias (0 V RHE ), which was three times and 15 times better than the photocurrent densities of p-Si/TiO 2 /CoO x and p-Si/TiO 2 , respectively. No decline in activity was observed over a five hour test period, yielding a Faradaic efficiency of 96% for H 2 production. Based on the electrochemical characterizations and the high energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) and emission spectroscopy measurements performed at the Ti Kα 1 fluorescence line, the superior performance of the p-Si/TiO 2 /NiO x photoelectrode was attributed to improved charge transfer properties induced by the NiO x coating on the protective TiO 2 layer, in combination with a higher catalytic activity of NiO x for H 2 -evolution. Moreover, we report here an excellent photo-electrochemical performance of p-Si/TiO 2 /NiO x photoelectrode in corrosive artificial seawater (pH 8.4) with an unprecedented photocurrent density of 10 mA cm −2 at an applied potential of −0.7 V RHE , and of 20 mA cm −2 at −0.9 V RHE . The applied bias photon-to-current conversion efficiency (ABPE) at −0.7 V RHE and 10 mA cm −2 was found to be 5.1%.
@article{kawde_photo-electrochemical_2018,
title = {Photo-electrochemical hydrogen production from neutral phosphate buffer and seawater using micro-structured p-{Si} photo-electrodes functionalized by solution-based methods},
volume = {2},
issn = {2398-4902},
url = {http://xlink.rsc.org/?DOI=C8SE00291F},
doi = {10.1039/C8SE00291F},
abstract = {Micro-structured p-Si/TiO
2
/NiO
x
allows for efficient photoelectrochemical H
2
production from seawater.
,
Solar fuels such as H
2
generated from sunlight and seawater using earth-abundant materials are expected to be a crucial component of a next generation renewable energy mix. We herein report a systematic analysis of the photo-electrochemical performance of TiO
2
coated, microstructured p-Si photo-electrodes (p-Si/TiO
2
) that were functionalized with CoO
x
and NiO
x
for H
2
generation. These photocathodes were synthesized from commercial p-Si wafers employing wet chemical methods. In neutral phosphate buffer and standard 1 sun illumination, the p-Si/TiO
2
/NiO
x
photoelectrode showed a photocurrent density of −1.48 mA cm
−2
at zero bias (0 V
RHE
), which was three times and 15 times better than the photocurrent densities of p-Si/TiO
2
/CoO
x
and p-Si/TiO
2
, respectively. No decline in activity was observed over a five hour test period, yielding a Faradaic efficiency of 96\% for H
2
production. Based on the electrochemical characterizations and the high energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) and emission spectroscopy measurements performed at the Ti Kα
1
fluorescence line, the superior performance of the p-Si/TiO
2
/NiO
x
photoelectrode was attributed to improved charge transfer properties induced by the NiO
x
coating on the protective TiO
2
layer, in combination with a higher catalytic activity of NiO
x
for H
2
-evolution. Moreover, we report here an excellent photo-electrochemical performance of p-Si/TiO
2
/NiO
x
photoelectrode in corrosive artificial seawater (pH 8.4) with an unprecedented photocurrent density of 10 mA cm
−2
at an applied potential of −0.7 V
RHE
, and of 20 mA cm
−2
at −0.9 V
RHE
. The applied bias photon-to-current conversion efficiency (ABPE) at −0.7 V
RHE
and 10 mA cm
−2
was found to be 5.1\%.},
language = {en},
number = {10},
urldate = {2021-06-07},
journal = {Sustainable Energy \& Fuels},
author = {Kawde, Anurag and Annamalai, Alagappan and Amidani, Lucia and Boniolo, Manuel and Kwong, Wai Ling and Sellstedt, Anita and Glatzel, Pieter and Wågberg, Thomas and Messinger, Johannes},
year = {2018},
pages = {2215--2223},
}
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These photocathodes were synthesized from commercial p-Si wafers employing wet chemical methods. In neutral phosphate buffer and standard 1 sun illumination, the p-Si/TiO 2 /NiO x photoelectrode showed a photocurrent density of −1.48 mA cm −2 at zero bias (0 V RHE ), which was three times and 15 times better than the photocurrent densities of p-Si/TiO 2 /CoO x and p-Si/TiO 2 , respectively. No decline in activity was observed over a five hour test period, yielding a Faradaic efficiency of 96% for H 2 production. Based on the electrochemical characterizations and the high energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) and emission spectroscopy measurements performed at the Ti Kα 1 fluorescence line, the superior performance of the p-Si/TiO 2 /NiO x photoelectrode was attributed to improved charge transfer properties induced by the NiO x coating on the protective TiO 2 layer, in combination with a higher catalytic activity of NiO x for H 2 -evolution. Moreover, we report here an excellent photo-electrochemical performance of p-Si/TiO 2 /NiO x photoelectrode in corrosive artificial seawater (pH 8.4) with an unprecedented photocurrent density of 10 mA cm −2 at an applied potential of −0.7 V RHE , and of 20 mA cm −2 at −0.9 V RHE . The applied bias photon-to-current conversion efficiency (ABPE) at −0.7 V RHE and 10 mA cm −2 was found to be 5.1%.","language":"en","number":"10","urldate":"2021-06-07","journal":"Sustainable Energy & Fuels","author":[{"propositions":[],"lastnames":["Kawde"],"firstnames":["Anurag"],"suffixes":[]},{"propositions":[],"lastnames":["Annamalai"],"firstnames":["Alagappan"],"suffixes":[]},{"propositions":[],"lastnames":["Amidani"],"firstnames":["Lucia"],"suffixes":[]},{"propositions":[],"lastnames":["Boniolo"],"firstnames":["Manuel"],"suffixes":[]},{"propositions":[],"lastnames":["Kwong"],"firstnames":["Wai","Ling"],"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":"2018","pages":"2215–2223","bibtex":"@article{kawde_photo-electrochemical_2018,\n\ttitle = {Photo-electrochemical hydrogen production from neutral phosphate buffer and seawater using micro-structured p-{Si} photo-electrodes functionalized by solution-based methods},\n\tvolume = {2},\n\tissn = {2398-4902},\n\turl = {http://xlink.rsc.org/?DOI=C8SE00291F},\n\tdoi = {10.1039/C8SE00291F},\n\tabstract = {Micro-structured p-Si/TiO\n 2\n /NiO\n x\n allows for efficient photoelectrochemical H\n 2\n production from seawater.\n \n , \n \n Solar fuels such as H\n 2\n generated from sunlight and seawater using earth-abundant materials are expected to be a crucial component of a next generation renewable energy mix. We herein report a systematic analysis of the photo-electrochemical performance of TiO\n 2\n coated, microstructured p-Si photo-electrodes (p-Si/TiO\n 2\n ) that were functionalized with CoO\n x\n and NiO\n x\n for H\n 2\n generation. These photocathodes were synthesized from commercial p-Si wafers employing wet chemical methods. In neutral phosphate buffer and standard 1 sun illumination, the p-Si/TiO\n 2\n /NiO\n x\n photoelectrode showed a photocurrent density of −1.48 mA cm\n −2\n at zero bias (0 V\n RHE\n ), which was three times and 15 times better than the photocurrent densities of p-Si/TiO\n 2\n /CoO\n x\n and p-Si/TiO\n 2\n , respectively. No decline in activity was observed over a five hour test period, yielding a Faradaic efficiency of 96\\% for H\n 2\n production. Based on the electrochemical characterizations and the high energy resolution fluorescence detected X-ray absorption near edge structure (HERFD-XANES) and emission spectroscopy measurements performed at the Ti Kα\n 1\n fluorescence line, the superior performance of the p-Si/TiO\n 2\n /NiO\n x\n photoelectrode was attributed to improved charge transfer properties induced by the NiO\n x\n coating on the protective TiO\n 2\n layer, in combination with a higher catalytic activity of NiO\n x\n for H\n 2\n -evolution. Moreover, we report here an excellent photo-electrochemical performance of p-Si/TiO\n 2\n /NiO\n x\n photoelectrode in corrosive artificial seawater (pH 8.4) with an unprecedented photocurrent density of 10 mA cm\n −2\n at an applied potential of −0.7 V\n RHE\n , and of 20 mA cm\n −2\n at −0.9 V\n RHE\n . 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