An Efficient, Full Spectrum-Driven H2 Evolution Z-Scheme Co2P/CdS Photocatalyst with Co-S Bonds

Nan Li, Yunxuan Ding, Jiaojiao Wu, Zhijie Zhao, Xitao Li, Yan-Zhen Zheng, Meilan Huang, Xia Tao

Research output: Contribution to journalArticle

Abstract

Exploring high efficiency, low cost and stable photocatalysts that enable full solar spectrum (UV, visible and near-infrared) utilization for photocatalytic hydrogen generation still faces huge challenge. Herein, a Co2P/CdS Z-scheme photocatalyst without noble metal is rationally fabricated to achieve ultrabroad UV-Vis-NIR-harvesting. Compared to Pt/CdS, CdS and Co2P, the optimized Co2P/CdS exhibits much more outstanding performance with the HER rate of 262.16, 66.98 and 3.93 mmol/g/h under solar, visible (780 nm > λ > 420 nm) and NIR (λ > 780 nm) light, respectively. Particularly, 10% Co2P/CdS displays a prominent AQE value of 2.26% at 700 nm. The Z-scheme transform route can effectively enhance the separation of charge carriers in Co2P/CdS for UV-Vis-driven H2 evolution reaction (HER), as confirmed by PL and photoelectrochemical measurements. More importantly, the Co-S bonds at the interface demonstrated by FTIR, Raman (mapping), XPS and density functional theory (DFT) calculations can act as “bridge” for charge transfer, thereby enhancing the full spectrum-driven H2 evolution. To our best knowledge, this is a rare research on full spectrum-driven photocatalytic HER without noble metal.
LanguageEnglish
JournalACS Applied Materials and Interfaces
Early online date04 Jun 2019
DOIs
Publication statusEarly online date - 04 Jun 2019

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Photocatalysts
Precious metals
Charge carriers
Reaction rates
Density functional theory
Charge transfer
Hydrogen
X ray photoelectron spectroscopy
Infrared radiation
Costs

Cite this

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title = "An Efficient, Full Spectrum-Driven H2 Evolution Z-Scheme Co2P/CdS Photocatalyst with Co-S Bonds",
abstract = "Exploring high efficiency, low cost and stable photocatalysts that enable full solar spectrum (UV, visible and near-infrared) utilization for photocatalytic hydrogen generation still faces huge challenge. Herein, a Co2P/CdS Z-scheme photocatalyst without noble metal is rationally fabricated to achieve ultrabroad UV-Vis-NIR-harvesting. Compared to Pt/CdS, CdS and Co2P, the optimized Co2P/CdS exhibits much more outstanding performance with the HER rate of 262.16, 66.98 and 3.93 mmol/g/h under solar, visible (780 nm > λ > 420 nm) and NIR (λ > 780 nm) light, respectively. Particularly, 10{\%} Co2P/CdS displays a prominent AQE value of 2.26{\%} at 700 nm. The Z-scheme transform route can effectively enhance the separation of charge carriers in Co2P/CdS for UV-Vis-driven H2 evolution reaction (HER), as confirmed by PL and photoelectrochemical measurements. More importantly, the Co-S bonds at the interface demonstrated by FTIR, Raman (mapping), XPS and density functional theory (DFT) calculations can act as “bridge” for charge transfer, thereby enhancing the full spectrum-driven H2 evolution. To our best knowledge, this is a rare research on full spectrum-driven photocatalytic HER without noble metal.",
author = "Nan Li and Yunxuan Ding and Jiaojiao Wu and Zhijie Zhao and Xitao Li and Yan-Zhen Zheng and Meilan Huang and Xia Tao",
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An Efficient, Full Spectrum-Driven H2 Evolution Z-Scheme Co2P/CdS Photocatalyst with Co-S Bonds. / Li, Nan; Ding, Yunxuan; Wu, Jiaojiao; Zhao, Zhijie; Li, Xitao; Zheng, Yan-Zhen; Huang, Meilan; Tao, Xia.

In: ACS Applied Materials and Interfaces, 04.06.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - An Efficient, Full Spectrum-Driven H2 Evolution Z-Scheme Co2P/CdS Photocatalyst with Co-S Bonds

AU - Li, Nan

AU - Ding, Yunxuan

AU - Wu, Jiaojiao

AU - Zhao, Zhijie

AU - Li, Xitao

AU - Zheng, Yan-Zhen

AU - Huang, Meilan

AU - Tao, Xia

PY - 2019/6/4

Y1 - 2019/6/4

N2 - Exploring high efficiency, low cost and stable photocatalysts that enable full solar spectrum (UV, visible and near-infrared) utilization for photocatalytic hydrogen generation still faces huge challenge. Herein, a Co2P/CdS Z-scheme photocatalyst without noble metal is rationally fabricated to achieve ultrabroad UV-Vis-NIR-harvesting. Compared to Pt/CdS, CdS and Co2P, the optimized Co2P/CdS exhibits much more outstanding performance with the HER rate of 262.16, 66.98 and 3.93 mmol/g/h under solar, visible (780 nm > λ > 420 nm) and NIR (λ > 780 nm) light, respectively. Particularly, 10% Co2P/CdS displays a prominent AQE value of 2.26% at 700 nm. The Z-scheme transform route can effectively enhance the separation of charge carriers in Co2P/CdS for UV-Vis-driven H2 evolution reaction (HER), as confirmed by PL and photoelectrochemical measurements. More importantly, the Co-S bonds at the interface demonstrated by FTIR, Raman (mapping), XPS and density functional theory (DFT) calculations can act as “bridge” for charge transfer, thereby enhancing the full spectrum-driven H2 evolution. To our best knowledge, this is a rare research on full spectrum-driven photocatalytic HER without noble metal.

AB - Exploring high efficiency, low cost and stable photocatalysts that enable full solar spectrum (UV, visible and near-infrared) utilization for photocatalytic hydrogen generation still faces huge challenge. Herein, a Co2P/CdS Z-scheme photocatalyst without noble metal is rationally fabricated to achieve ultrabroad UV-Vis-NIR-harvesting. Compared to Pt/CdS, CdS and Co2P, the optimized Co2P/CdS exhibits much more outstanding performance with the HER rate of 262.16, 66.98 and 3.93 mmol/g/h under solar, visible (780 nm > λ > 420 nm) and NIR (λ > 780 nm) light, respectively. Particularly, 10% Co2P/CdS displays a prominent AQE value of 2.26% at 700 nm. The Z-scheme transform route can effectively enhance the separation of charge carriers in Co2P/CdS for UV-Vis-driven H2 evolution reaction (HER), as confirmed by PL and photoelectrochemical measurements. More importantly, the Co-S bonds at the interface demonstrated by FTIR, Raman (mapping), XPS and density functional theory (DFT) calculations can act as “bridge” for charge transfer, thereby enhancing the full spectrum-driven H2 evolution. To our best knowledge, this is a rare research on full spectrum-driven photocatalytic HER without noble metal.

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