Visible-light-driven photocatalytic system based on a nickel complex over CdS materials for hydrogen production from water

Peng, Qiuxia; Xue, Dan; Zhan, Shu‐Zhong; Ni, Chun-Lin

doi:10.1016/j.apcatb.2017.07.034

“…During the past decades, lots of visible‐light‐active photocatalysts, including g‐C 3 N 4 ,, CdS,, and Zn x Cd 1−x S etc., have been developed for H 2 generation. Among these photocatalysts, Zn x Cd 1−x S is definitely promising for H 2 production.…”

Section: Introductionmentioning

confidence: 99%

In Situ Decoration of Zn_xCd_1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

Zhu

¹

,

Yu

²

,

Gong

³

et al. 2018

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FeP as a noble‐metal‐free catalyst has been successfully decorated onto the ZnxCd1−xS photocatalyst surface through an in situ phosphating process. In particular, the 2 % FeP/Zn0.5Cd0.5S−P sample showed the best hydrogen generation activity of 24.45 mmol h−1 g−1 which is over 130 times higher than that of pure Zn0.5Cd0.5S and nearly 1.3 times higher than that of the 1 % Pt‐loaded Zn0.5Cd0.5S−P sample. The apparent quantum yield (AQY) of the 2 % FeP/Zn0.5Cd0.5S−P was estimated to be over 10 % at wavelengths up to 470 nm. The fluorescence spectra and electrochemical measurement results suggest that the decorated FeP not only reduces the overpotential for H2 evolution but also promotes the separation of the photogenerated charge carriers through formation of a heterojunction with Zn0.5Cd0.5S, which eventually leads to the superior activity of the FeP/Zn0.5Cd0.5S−P photocatalyst for visible‐light‐driven hydrogen generation.

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“…The concentration of a catalyst can significantly affect H 2 production . Figure b shows the activity of complex 3 in various concentrations for photocatalytic H 2 evolution.…”

Section: Resultsmentioning

confidence: 99%

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H₂)

Du

¹

2020

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The catalytic decomposition of formic acid to generate syngas (a mixture of H2 and CO) is a highly valuable strategy for energy conversion. Syngas can be used directly in internal combustion engines or can be converted to liquid fuels, meeting future energy challenges in a sustainable manner. Herein, we report the use of homogeneous molecular iron catalysts combined with a CdS nanorods (NRs) semiconductor to construct a highly efficient photocatalytic system for direct conversion of formic acid to syngas at room temperature and atmospheric pressure. Under optimal conditions, the photocatalytic system presents an activity of 150 mmol gcatalyst−1 h−1 towards H2, and an apparent quantum yield (AQY) of 16.8 %, making it among the most active noble‐metal‐free photocatalytic systems for H2 evolution from formic acid under visible light. Meanwhile, these iron‐based molecular catalysts also demonstrate remarkable enhancement in CO evolution with robust stability. The mechanistic role of the molecular catalyst is further investigated by using cyclic voltammetry, which suggests the formation of FeI species as the key step in the catalytic conversion of formic acid to syngas.

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“…[11,22] Theconcentration of acatalyst can significantly affect H 2 production. [23] Figure 2b shows the activity of complex 3 in various concentrations for photocatalytic H 2 evolution. Initially,t he H 2 production rate increases with an increasing concentration of complex 3 and the highest H 2 evolution rate of 140 mmol h À1 was observed at ac oncentration of 0.04 mm.…”

Section: Methodsmentioning

confidence: 99%

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H₂)

Irfan

¹

,

Wang

²

,

Jiang

³

et al. 2020

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The catalytic decomposition of formic acid to generate syngas (a mixture of H2 and CO) is a highly valuable strategy for energy conversion. Syngas can be used directly in internal combustion engines or can be converted to liquid fuels, meeting future energy challenges in a sustainable manner. Herein, we report the use of homogeneous molecular iron catalysts combined with a CdS nanorods (NRs) semiconductor to construct a highly efficient photocatalytic system for direct conversion of formic acid to syngas at room temperature and atmospheric pressure. Under optimal conditions, the photocatalytic system presents an activity of 150 mmol gcatalyst−1 h−1 towards H2, and an apparent quantum yield (AQY) of 16.8 %, making it among the most active noble‐metal‐free photocatalytic systems for H2 evolution from formic acid under visible light. Meanwhile, these iron‐based molecular catalysts also demonstrate remarkable enhancement in CO evolution with robust stability. The mechanistic role of the molecular catalyst is further investigated by using cyclic voltammetry, which suggests the formation of FeI species as the key step in the catalytic conversion of formic acid to syngas.

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Visible-light-driven photocatalytic system based on a nickel complex over CdS materials for hydrogen production from water

Cited by 65 publications

References 61 publications

In Situ Decoration of Zn_xCd_1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

In Situ Decoration of Zn_xCd_1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H₂)

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H₂)

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Visible-light-driven photocatalytic system based on a nickel complex over CdS materials for hydrogen production from water

Cited by 65 publications

References 61 publications

In Situ Decoration of ZnxCd1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

In Situ Decoration of ZnxCd1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H2)

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H2)

Contact Info

Product

Resources

About

In Situ Decoration of Zn_xCd_1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

In Situ Decoration of Zn_xCd_1−xS with FeP for Efficient Photocatalytic Generation of Hydrogen under Irradiation with Visible Light

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H₂)

Homogeneous Molecular Iron Catalysts for Direct Photocatalytic Conversion of Formic Acid to Syngas (CO+H₂)