SnO2@WS2/p-Si Heterostructure Photocathode for Photoelectrochemical Hydrogen Production

Mahider Asmare Tekalgne; Amirhossein Hasani; Do Yeon Heo; Quyet Van Le; Thang Phan Nguyen; Tae Hyung Lee; Sang Hyun Ahn; Ho Won Jang; Soo Young Kim

doi:10.1021/acs.jpcc.9b09623

SnO₂@WS₂/p-Si Heterostructure Photocathode for Photoelectrochemical Hydrogen Production

Mahider Asmare Tekalgne
, Amirhossein Hasani
, Do Yeon Heo
, Quyet Van Le
, Thang Phan Nguyen
, Tae Hyung Lee
, Sang Hyun Ahn
, Ho Won Jang^*
, Soo Young Kim^*

^*Corresponding author for this work

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

26 Citations (Scopus)

Abstract

This study reports an effective method to enhance the performance of photoelectrochemical (PEC) solar water reduction. We design and prepare a SnO2@WS2 NF heterostructure on p-Si that has better visible-light absorption as well as low recombination of electron-hole pairs. Consequently, a -3.5 mA cm-2 photocurrent density at 0 V versus a reversible hydrogen electrode is obtained using SnO2@WS2, and bare SnO2 and WS2 photocathodes exhibit values of -0.6 and -0.36 mA cm-2, respectively, showing the combined effects of these two materials for excellent hydrogen evolution reaction performance. Additionally, the photocurrent stability of the sample reveals the improved efficiency for the separation of generated charge carriers. Our study provides experimental and theoretical evidence that SnO2 doping improves the properties of WS2 for efficient PEC solar water reduction.

Original language	English
Pages (from-to)	647-652
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	124
Issue number	1
DOIs	https://doi.org/10.1021/acs.jpcc.9b09623
Publication status	Published - 2020 Jan 9

Bibliographical note

Publisher Copyright:
© 2019 American Chemical Society.

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1021/acs.jpcc.9b09623

Cite this

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title = "SnO2@WS2/p-Si Heterostructure Photocathode for Photoelectrochemical Hydrogen Production",

abstract = "This study reports an effective method to enhance the performance of photoelectrochemical (PEC) solar water reduction. We design and prepare a SnO2@WS2 NF heterostructure on p-Si that has better visible-light absorption as well as low recombination of electron-hole pairs. Consequently, a -3.5 mA cm-2 photocurrent density at 0 V versus a reversible hydrogen electrode is obtained using SnO2@WS2, and bare SnO2 and WS2 photocathodes exhibit values of -0.6 and -0.36 mA cm-2, respectively, showing the combined effects of these two materials for excellent hydrogen evolution reaction performance. Additionally, the photocurrent stability of the sample reveals the improved efficiency for the separation of generated charge carriers. Our study provides experimental and theoretical evidence that SnO2 doping improves the properties of WS2 for efficient PEC solar water reduction.",

author = "Tekalgne, \{Mahider Asmare\} and Amirhossein Hasani and Heo, \{Do Yeon\} and \{Van Le\}, Quyet and Nguyen, \{Thang Phan\} and Lee, \{Tae Hyung\} and Ahn, \{Sang Hyun\} and Jang, \{Ho Won\} and Kim, \{Soo Young\}",

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doi = "10.1021/acs.jpcc.9b09623",

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T1 - SnO2@WS2/p-Si Heterostructure Photocathode for Photoelectrochemical Hydrogen Production

AU - Tekalgne, Mahider Asmare

AU - Hasani, Amirhossein

AU - Heo, Do Yeon

AU - Van Le, Quyet

AU - Nguyen, Thang Phan

AU - Lee, Tae Hyung

AU - Ahn, Sang Hyun

AU - Jang, Ho Won

AU - Kim, Soo Young

PY - 2020/1/9

Y1 - 2020/1/9

N2 - This study reports an effective method to enhance the performance of photoelectrochemical (PEC) solar water reduction. We design and prepare a SnO2@WS2 NF heterostructure on p-Si that has better visible-light absorption as well as low recombination of electron-hole pairs. Consequently, a -3.5 mA cm-2 photocurrent density at 0 V versus a reversible hydrogen electrode is obtained using SnO2@WS2, and bare SnO2 and WS2 photocathodes exhibit values of -0.6 and -0.36 mA cm-2, respectively, showing the combined effects of these two materials for excellent hydrogen evolution reaction performance. Additionally, the photocurrent stability of the sample reveals the improved efficiency for the separation of generated charge carriers. Our study provides experimental and theoretical evidence that SnO2 doping improves the properties of WS2 for efficient PEC solar water reduction.

AB - This study reports an effective method to enhance the performance of photoelectrochemical (PEC) solar water reduction. We design and prepare a SnO2@WS2 NF heterostructure on p-Si that has better visible-light absorption as well as low recombination of electron-hole pairs. Consequently, a -3.5 mA cm-2 photocurrent density at 0 V versus a reversible hydrogen electrode is obtained using SnO2@WS2, and bare SnO2 and WS2 photocathodes exhibit values of -0.6 and -0.36 mA cm-2, respectively, showing the combined effects of these two materials for excellent hydrogen evolution reaction performance. Additionally, the photocurrent stability of the sample reveals the improved efficiency for the separation of generated charge carriers. Our study provides experimental and theoretical evidence that SnO2 doping improves the properties of WS2 for efficient PEC solar water reduction.

UR - https://www.scopus.com/pages/publications/85077014866

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