A stable and highly efficient visible-light-driven hydrogen evolution porous CdS/WO3/TiO2 photocatalysts

Qian, Yongteng; Yang, Mengke; Zhang, Fangfang; Du, Jimin; Li, Kaidi; Lin, Xialing; Zhu, Xinrui; Lu, Yayun; Wang, Weimin; Kang, Dae Joon

doi:10.1016/j.matchar.2018.05.025

Cited by 62 publications

(20 citation statements)

References 48 publications

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“…Therefore, It can be seen that small amount of Co doping can improve the catalytic performance of Ni (Figure c). We assume that mainly Co(III) played a major role …”

Section: Methodsmentioning

confidence: 99%

Ultrathin Nanobelts as an Excellent Bifunctional Oxygen Catalyst: Insight into the Subtle Changes in Structure and Synergistic Effects of Bimetallic Metal–Organic Framework

Xiao

Yuan

et al. 2018

Small Methods

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In recent years, increasing attention has been paid to metal–organic frameworks by scientists working in the field of electrocatalytic material chemistry. Herein, using the hydrothermal method, ultrathin Ni/Co bimetallic metal–organic framework nanobelts that can be directly adopted as highly efficient electrocatalysts are prepared. The optimized Ni/Co ultrathin nanobelts can reach an onset potential of 0.939 V [these values are very close to those of Pt/C (0.940 V)] and show superior stability relative to that of Pt/C toward oxygen reduction reaction (ORR). Additionally, under the current density of 10 mA cm−2, the Ni/Co ultrathin nanobelts show the potential of 1.478 V for oxygen evolution reaction (OER), which is much better than that of IrO2, indicating the large potential of the metal–organic frameworks as a bifunctional oxygen catalyst in metal–air batteries. In addition, after OER and ORR, the color of the Ni/Co ultrathin nanobelts sample is slightly lighter, and it can be seen that the channel becomes blurred but still exists. The X‐ray diffraction, infrared spectrometry, and X‐ray photoelectron spectroscopy results for Ni/Co ultrathin nanobelts before and after catalysis are basically identical. The findings suggest that the ultrathin belt‐like structure and the synergy effect between Ni and Co are crucial for tuning the electrocatalytic activity.

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“…Therefore, It can be seen that small amount of Co doping can improve the catalytic performance of Ni (Figure c). We assume that mainly Co(III) played a major role …”

Section: Methodsmentioning

confidence: 99%

Ultrathin Nanobelts as an Excellent Bifunctional Oxygen Catalyst: Insight into the Subtle Changes in Structure and Synergistic Effects of Bimetallic Metal–Organic Framework

Xiao

Yuan

et al. 2018

Small Methods

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“…As shown in Figure e, the black Pd‐containing areas exhibit a lattice fringe of 0.28 nm corresponds to the (200) plane of the cubic PdO(JCPDS 46–1211) and is different from the fringes on grey areas 0.33 nm belonging to CeO 2 . Both the two types of lattice fringes are closely located to each other which indicates a good contact of interfaces, thus enhancing the photogenerated charge separation efficiency . SAED analysis (Figure c) of the diffraction ring patterns of the Pd/CeO 2 indicates that the product is composed of fcc CeO 2 .…”

Section: Resultsmentioning

confidence: 93%

Palladium‐Supported Nanoceria: A Highly Efficient Catalyst for Solvent‐Free Selective Oxidation of Ethylbenzene to Acetophenone

Kalita

Saikia

2020

ChemistrySelect

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The benzylic C−H oxidation of ethylbenzene, a toxic petroleum waste, to high value‐added acetophenone is a fundamental yet important chemical transformation. Herein, palladium nanoparticles were immobilized on a highly mesoporous CeO2 surface for enhancing the catalytic activity. The Pd/CeO2nanocomposite was employed in the benzylic C−H oxidation of ethylbenzene under solvent‐free conditions and using tert‐butyl hydroperoxide as oxidant which displayed high conversion of 99.8% and a selectivity of 79% towards acetophenone. Moreover, the Pd/CeO2 catalysts were highly stable and could be recycled up to the fifth catalytic cycle without remarkable loss in its catalytic activity.

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“…Moreover, in Figure c, a small peak located at 226.5 eV can be assigned to the S 2s in MoS 2 . For XPS spectrum of S 2p (Figure d), two peaks located at 162.8 and 163.6 eV match to the S 2− 2P 3/2 and S 2− 2P 1/2 in MoS 2 , respectively . The XPS spectra of C 1s (Figure e) shows the peaks at 288.1 and 284.8 eV are due to the sp 2 carbon band and graphitic carbon in g‐C 3 N 4 , respectively .…”

Section: Resultsmentioning

confidence: 99%

Enhanced Interfacial Charge Transfer and Separation Rate based on Sub 10 nm MoS₂ Nanoflakes In Situ Grown on Graphitic‐C₃N₄

Qian

Cui

et al. 2019

Adv Materials Inter

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Herein, sub 10 nm MoS2 nanoflakes are successfully in situ grown on graphitic‐carbon‐nitride (MoS2/g‐C3N4) through a hydrothermal strategy. The scanning electron microscopy result indicates that the thickness of the MoS2 nanoflakes is less than 10 nm, which can boost the transport rate of the photoproduced charge during the photodegradation process. Transmission electron microscopy result clearly shows that an excellent interfacial heterojunction is formed between g‐C3N4 and MoS2, which will significantly improve the stability of catalysts. Particularly, the optimal 8% MoS2/g‐C3N4 product displays significantly enhance catalytic performance and excellent long‐term photodurability. These superior photocatalytic properties are attributed to the excellent interfacial heterostructure between MoS2 and g‐C3N4, which extends the visible light absorption range, suppresses the recombination, and improves the transfer rate of photoproduced charge.

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A stable and highly efficient visible-light-driven hydrogen evolution porous CdS/WO3/TiO2 photocatalysts

Cited by 62 publications

References 48 publications

Ultrathin Nanobelts as an Excellent Bifunctional Oxygen Catalyst: Insight into the Subtle Changes in Structure and Synergistic Effects of Bimetallic Metal–Organic Framework

Ultrathin Nanobelts as an Excellent Bifunctional Oxygen Catalyst: Insight into the Subtle Changes in Structure and Synergistic Effects of Bimetallic Metal–Organic Framework

Palladium‐Supported Nanoceria: A Highly Efficient Catalyst for Solvent‐Free Selective Oxidation of Ethylbenzene to Acetophenone

Enhanced Interfacial Charge Transfer and Separation Rate based on Sub 10 nm MoS₂ Nanoflakes In Situ Grown on Graphitic‐C₃N₄

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A stable and highly efficient visible-light-driven hydrogen evolution porous CdS/WO3/TiO2 photocatalysts

Cited by 62 publications

References 48 publications

Ultrathin Nanobelts as an Excellent Bifunctional Oxygen Catalyst: Insight into the Subtle Changes in Structure and Synergistic Effects of Bimetallic Metal–Organic Framework

Ultrathin Nanobelts as an Excellent Bifunctional Oxygen Catalyst: Insight into the Subtle Changes in Structure and Synergistic Effects of Bimetallic Metal–Organic Framework

Palladium‐Supported Nanoceria: A Highly Efficient Catalyst for Solvent‐Free Selective Oxidation of Ethylbenzene to Acetophenone

Enhanced Interfacial Charge Transfer and Separation Rate based on Sub 10 nm MoS2 Nanoflakes In Situ Grown on Graphitic‐C3N4

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Enhanced Interfacial Charge Transfer and Separation Rate based on Sub 10 nm MoS₂ Nanoflakes In Situ Grown on Graphitic‐C₃N₄