A photo-responsive electrocatalyst: CdSe quantum dot sensitized WS2 nanosheets for hydrogen evolution in neutral solution

Yueyao Zhong; Bin Chang; Yongliang Shao; Yongzhong Wu; Xiaopeng Hao

doi:10.1039/c8nj03810d

A photo-responsive electrocatalyst: CdSe quantum dot sensitized WS₂ nanosheets for hydrogen evolution in neutral solution

Yueyao Zhong, Bin Chang, Yongliang Shao, Yongzhong Wu^*, Xiaopeng Hao

^*Corresponding author for this work

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

8 Scopus citations

Abstract

Combining photochemical and electrochemical energy conversion into a single catalytic system is an efficient method for energy generation. In this paper, to increase the electrocatalytic activity of 2H-WS₂ nanosheets, CdSe quantum dots (QDs) are introduced as sensitizers to design a novel photo-responsive electrode. The electrocatalytic HER activity of the nanocomposites is observably enhanced under 300 W Xe lamp irradiation (λ ≥ 420 nm, the overpotential decreases from -1030 mV vs. RHE to -400 mV vs. RHE at a cathodic current density of 10 mA cm^-2 in neutral electrolyte without adding any sacrificial agent, and the Tafel slope decreases from 132 mV dec^-1 to 56 mV dec^-1). Moreover, the photo-enhanced electrocatalyst demonstrates high stability, which is reflected by a steady-state performance for more than 24 h. This strategy may have potential use in designing and fabricating novel photo-assisted electrocatalysts.

Original language	English (US)
Pages (from-to)	18021-18027
Number of pages	7
Journal	New Journal of Chemistry
Volume	42
Issue number	22
DOIs	https://doi.org/10.1039/c8nj03810d
State	Published - 2018

Bibliographical note

Funding Information:
This work is supported by the National Natural Science Foundation of China (51572153 and 51321091), the Fundamental Research Funds of Shandong University, and Taishan Scholars Program of Shandong Province.

Publisher Copyright:
© 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

ASJC Scopus subject areas

Catalysis
General Chemistry
Materials Chemistry

Access to Document

10.1039/c8nj03810d

Cite this

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title = "A photo-responsive electrocatalyst: CdSe quantum dot sensitized WS2 nanosheets for hydrogen evolution in neutral solution",

abstract = "Combining photochemical and electrochemical energy conversion into a single catalytic system is an efficient method for energy generation. In this paper, to increase the electrocatalytic activity of 2H-WS2 nanosheets, CdSe quantum dots (QDs) are introduced as sensitizers to design a novel photo-responsive electrode. The electrocatalytic HER activity of the nanocomposites is observably enhanced under 300 W Xe lamp irradiation (λ ≥ 420 nm, the overpotential decreases from -1030 mV vs. RHE to -400 mV vs. RHE at a cathodic current density of 10 mA cm-2 in neutral electrolyte without adding any sacrificial agent, and the Tafel slope decreases from 132 mV dec-1 to 56 mV dec-1). Moreover, the photo-enhanced electrocatalyst demonstrates high stability, which is reflected by a steady-state performance for more than 24 h. This strategy may have potential use in designing and fabricating novel photo-assisted electrocatalysts.",

author = "Yueyao Zhong and Bin Chang and Yongliang Shao and Yongzhong Wu and Xiaopeng Hao",

note = "Funding Information: This work is supported by the National Natural Science Foundation of China (51572153 and 51321091), the Fundamental Research Funds of Shandong University, and Taishan Scholars Program of Shandong Province. Publisher Copyright: {\textcopyright} 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.",

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AU - Zhong, Yueyao

AU - Chang, Bin

AU - Shao, Yongliang

AU - Wu, Yongzhong

AU - Hao, Xiaopeng

N1 - Funding Information: This work is supported by the National Natural Science Foundation of China (51572153 and 51321091), the Fundamental Research Funds of Shandong University, and Taishan Scholars Program of Shandong Province. Publisher Copyright: © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique.

PY - 2018

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N2 - Combining photochemical and electrochemical energy conversion into a single catalytic system is an efficient method for energy generation. In this paper, to increase the electrocatalytic activity of 2H-WS2 nanosheets, CdSe quantum dots (QDs) are introduced as sensitizers to design a novel photo-responsive electrode. The electrocatalytic HER activity of the nanocomposites is observably enhanced under 300 W Xe lamp irradiation (λ ≥ 420 nm, the overpotential decreases from -1030 mV vs. RHE to -400 mV vs. RHE at a cathodic current density of 10 mA cm-2 in neutral electrolyte without adding any sacrificial agent, and the Tafel slope decreases from 132 mV dec-1 to 56 mV dec-1). Moreover, the photo-enhanced electrocatalyst demonstrates high stability, which is reflected by a steady-state performance for more than 24 h. This strategy may have potential use in designing and fabricating novel photo-assisted electrocatalysts.

AB - Combining photochemical and electrochemical energy conversion into a single catalytic system is an efficient method for energy generation. In this paper, to increase the electrocatalytic activity of 2H-WS2 nanosheets, CdSe quantum dots (QDs) are introduced as sensitizers to design a novel photo-responsive electrode. The electrocatalytic HER activity of the nanocomposites is observably enhanced under 300 W Xe lamp irradiation (λ ≥ 420 nm, the overpotential decreases from -1030 mV vs. RHE to -400 mV vs. RHE at a cathodic current density of 10 mA cm-2 in neutral electrolyte without adding any sacrificial agent, and the Tafel slope decreases from 132 mV dec-1 to 56 mV dec-1). Moreover, the photo-enhanced electrocatalyst demonstrates high stability, which is reflected by a steady-state performance for more than 24 h. This strategy may have potential use in designing and fabricating novel photo-assisted electrocatalysts.

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