Investigation of the enhanced photocathodic activity of La5Ti2CuS5O7 photocathodes in H2 evolution by synchrotron radiation nanospectroscopy

Enju Sakai; Naoka Nagamura; Jingyuan Liu; Takashi Hisatomi; Taro Yamada; Kazunari Domen; Masaharu Oshima

doi:10.1039/c6nr06541d

Investigation of the enhanced photocathodic activity of La₅Ti₂CuS₅O₇ photocathodes in H₂ evolution by synchrotron radiation nanospectroscopy

Enju Sakai
, Naoka Nagamura
, Jingyuan Liu
, Takashi Hisatomi
, Taro Yamada
, Kazunari Domen
, Masaharu Oshima^*

^*Corresponding author for this work

The University of Tokyo
Japan Technological Research Association of Artificial Photosynthetic Chemical Process (ARPChem)
National Institute for Materials Science Tsukuba

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

The local electronic structures of La₅Ti₂MS₅O₇ (M = Cu, Ag) particulate photoelectrodes with and without Ga doping were investigated, using a photoemission spectroscopy system with a lateral resolution of approximately 100 nm. The band alignments for La₅Ti₂MS₅O₇ were determined on the basis of pinpoint photoemission spectra acquired at optimal positions on the sample surfaces. A clear upward chemical potential shift of approximately 0.35 eV was observed in the case of Ga-doped La₅Ti₂CuS₅O₇. On the other hand, the electronic structure of La₅Ti₂AgS₅O₇ remained almost unaffected by Ga doping. These results explain the enhanced photocathodic response of La₅Ti₂CuS₅O₇ upon Ga doping.

Original language	English
Pages (from-to)	18893-18896
Number of pages	4
Journal	Nanoscale
Volume	8
Issue number	45
DOIs	https://doi.org/10.1039/c6nr06541d
State	Published - 7 Dec 2016
Externally published	Yes

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title = "Investigation of the enhanced photocathodic activity of La5Ti2CuS5O7 photocathodes in H2 evolution by synchrotron radiation nanospectroscopy",

abstract = "The local electronic structures of La5Ti2MS5O7 (M = Cu, Ag) particulate photoelectrodes with and without Ga doping were investigated, using a photoemission spectroscopy system with a lateral resolution of approximately 100 nm. The band alignments for La5Ti2MS5O7 were determined on the basis of pinpoint photoemission spectra acquired at optimal positions on the sample surfaces. A clear upward chemical potential shift of approximately 0.35 eV was observed in the case of Ga-doped La5Ti2CuS5O7. On the other hand, the electronic structure of La5Ti2AgS5O7 remained almost unaffected by Ga doping. These results explain the enhanced photocathodic response of La5Ti2CuS5O7 upon Ga doping.",

author = "Enju Sakai and Naoka Nagamura and Jingyuan Liu and Takashi Hisatomi and Taro Yamada and Kazunari Domen and Masaharu Oshima",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2016",

month = dec,

day = "7",

doi = "10.1039/c6nr06541d",

language = "英语",

volume = "8",

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TY - JOUR

T1 - Investigation of the enhanced photocathodic activity of La5Ti2CuS5O7 photocathodes in H2 evolution by synchrotron radiation nanospectroscopy

AU - Sakai, Enju

AU - Nagamura, Naoka

AU - Liu, Jingyuan

AU - Hisatomi, Takashi

AU - Yamada, Taro

AU - Domen, Kazunari

AU - Oshima, Masaharu

PY - 2016/12/7

Y1 - 2016/12/7

N2 - The local electronic structures of La5Ti2MS5O7 (M = Cu, Ag) particulate photoelectrodes with and without Ga doping were investigated, using a photoemission spectroscopy system with a lateral resolution of approximately 100 nm. The band alignments for La5Ti2MS5O7 were determined on the basis of pinpoint photoemission spectra acquired at optimal positions on the sample surfaces. A clear upward chemical potential shift of approximately 0.35 eV was observed in the case of Ga-doped La5Ti2CuS5O7. On the other hand, the electronic structure of La5Ti2AgS5O7 remained almost unaffected by Ga doping. These results explain the enhanced photocathodic response of La5Ti2CuS5O7 upon Ga doping.

AB - The local electronic structures of La5Ti2MS5O7 (M = Cu, Ag) particulate photoelectrodes with and without Ga doping were investigated, using a photoemission spectroscopy system with a lateral resolution of approximately 100 nm. The band alignments for La5Ti2MS5O7 were determined on the basis of pinpoint photoemission spectra acquired at optimal positions on the sample surfaces. A clear upward chemical potential shift of approximately 0.35 eV was observed in the case of Ga-doped La5Ti2CuS5O7. On the other hand, the electronic structure of La5Ti2AgS5O7 remained almost unaffected by Ga doping. These results explain the enhanced photocathodic response of La5Ti2CuS5O7 upon Ga doping.

UR - https://www.scopus.com/pages/publications/84996549890

U2 - 10.1039/c6nr06541d

DO - 10.1039/c6nr06541d

M3 - 文章

AN - SCOPUS:84996549890

SN - 2040-3364

VL - 8

SP - 18893

EP - 18896

JO - Nanoscale

JF - Nanoscale

IS - 45

ER -

Investigation of the enhanced photocathodic activity of La₅Ti₂CuS₅O₇ photocathodes in H₂ evolution by synchrotron radiation nanospectroscopy

Abstract

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