Decorating geometry- and size-controlled sub-20 nm Pd nanocubes onto 2D TiO<sub>2</sub> nanosheets for simultaneous H<sub>2</sub> evolution and 1,1-diethoxyethane production

Weng, Bo; Quan, Quan; Xu, Yi–Jun

doi:10.1039/c6ta07853b

Cited by 91 publications

(104 citation statements)

References 86 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, Raman spectrum of the TNTAs@RGO composite is recorded in Figure S5 (Supporting Information). The characteristic peaks located at 145, 396, 514, 638 cm −1 are observed, corresponding to E g(1) , B 1g(1) , A 1g + B 1g(2) , and E g(2) modes of anatase TiO 2 . Two bands located at about 1346 cm ‐1 (D band) and 1599 cm −1 (G band) for the graphitized structures are also observed, further confirming the successful deposition of RGO film on the TNTAs.…”

Section: Resultssupporting

confidence: 59%

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO₂ Nanotube Arrays@RGO/MoS₂ Heterostructure

Quan

Xie

Weng

et al. 2018

Small

Self Cite

View full text Add to dashboard Cite

Charge separation/transfer is generally believed to be the most key factor affecting the efficiency of photocatalysis, which however will be counteracted if not taking the active site engineering into account for a specific photoredox reaction. Here, a 3D heterostructure composite is designed consisting of MoS nanoplatelets decorated on reduced graphene oxide-wrapped TiO nanotube arrays (TNTAs@RGO/MoS ). Such a cascade configuration renders a directional migration of charge carriers and controlled immobilization of active sites, thereby showing much higher photoactivity for water splitting to H than binary TNTAs@RGO and TNTAs/MoS . The photoactivity comparison and mechanistic analysis reveal the double-edged sword role of RGO on boosted charge separation/transfer versus active site control in this composite system. The as-observed inconsistency between boosted charge transfer and lowered photoactivity over TNTAs@RGO is attributed to the decrease of active sites for H evolution, which is significantly different from the previous reports in literature. The findings of the intrinsic relationship of balanced benefits from charge separation/transfer and active site control could promote the rational optimization of photocatalyst design by cooperatively manipulating charge flow and active site control, thereby improving the efficiency of photocatalysis for target photoredox processes.

show abstract

Section: Resultssupporting

confidence: 59%

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO₂ Nanotube Arrays@RGO/MoS₂ Heterostructure

Quan

Xie

Weng

et al. 2018

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…Bare SiO 2 spheres show no photocurrent response under visible light irradiation ( λ > 420 nm), which is consistent with its large band gap 47 . After coupling with Au GSH clusters, the obvious photocurrent density over SAB verifies the substantial photosensitization effect of Au GSH clusters on the PEC performance of SAB in the range of visible light 15 , 63 , 64 . With the coating of TiO 2 thin layer, the SABT-0.05 sample exhibits higher photocurrent density than SAB, which suggests that the separation of photoinduced charge carriers over SABT-0.05 has been efficiently facilitated as compared to that of SAB.…”

Section: Resultsmentioning

confidence: 70%

“…3d . Electrochemical impedance spectroscopy (EIS), as a method to monitor charge transfer process on the electrode and at the contact interface between electrode and electrolyte 64 , has further confirmed that the SABT with thin shell of TiO 2 layer improves the charge carrier migration of SABT composites efficiently as compared to that with thick one (Supplementary Fig. 29 ).…”

Section: Resultsmentioning

confidence: 85%

Stabilizing ultrasmall Au clusters for enhanced photoredox catalysis

et al. 2018

Self Cite

View full text Add to dashboard Cite

Recently, loading ligand-protected gold (Au) clusters as visible light photosensitizers onto various supports for photoredox catalysis has attracted considerable attention. However, the efficient control of long-term photostability of Au clusters on the metal-support interface remains challenging. Herein, we report a simple and efficient method for enhancing the photostability of glutathione-protected Au clusters (Au GSH clusters) loaded on the surface of SiO2 sphere by utilizing multifunctional branched poly-ethylenimine (BPEI) as a surface charge modifying, reducing and stabilizing agent. The sequential coating of thickness controlled TiO2 shells can further significantly improve the photocatalytic efficiency, while such structurally designed core-shell SiO2-Au GSH clusters-BPEI@TiO2 composites maintain high photostability during longtime light illumination conditions. This joint strategy via interfacial modification and composition engineering provides a facile guideline for stabilizing ultrasmall Au clusters and rational design of Au clusters-based composites with improved activity toward targeting applications in photoredox catalysis.

show abstract

“…Zhang and co‐workers demonstrated that Pd/TiO 2 nanostructures are highly photo‐active for the dehydrogenation C−O coupling of ethanol into DEE . Xu's group reported that the decoration of Pd nanocubes onto TiO 2 nanosheets allows simultaneous DEE production and H 2 evolution under ultraviolet light . However, the only ultraviolet light response of TiO 2 and the expensive noble metal co‐catalysts restrict the large‐scale actual application of photocatalytic acetal reactions.…”

Section: Figurementioning

confidence: 99%

Visible‐Light Direct Conversion of Ethanol to 1,1‐Diethoxyethane and Hydrogen over a Non‐Precious Metal Photocatalyst

Chao

Zhang

et al. 2018

Chemistry A European J

View full text Add to dashboard Cite

Converting renewable biomass and their derivatives into chemicals and fuels has received much attention to reduce the dependence on fossil resources. Photocatalytic ethanol dehydrogenation–acetalization to prepare value‐added 1,1‐diethoxyethane and H2 was achieved over non‐precious metal CdS/Ni‐MoS2 catalyst under visible light. The system displays an excellent production rate and high selectivity of 1,1‐diethoxyethane, 52.1 mmol g−1 h−1 and 99.2 %, respectively. In‐situ electron spin resonance, photoluminescence spectroscopy and transient photocurrent responses were conducted to investigate the mechanism. This study provides a promising strategy for a green application of bioethanol.

show abstract

Decorating geometry- and size-controlled sub-20 nm Pd nanocubes onto 2D TiO₂ nanosheets for simultaneous H₂ evolution and 1,1-diethoxyethane production

Abstract: The morphological characteristics of metal play a pivotal role in affecting the activity of metal–semiconductor composite photocatalysts for solar energy conversion.

Cited by 91 publications

References 86 publications

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO₂ Nanotube Arrays@RGO/MoS₂ Heterostructure

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO₂ Nanotube Arrays@RGO/MoS₂ Heterostructure

Stabilizing ultrasmall Au clusters for enhanced photoredox catalysis

Visible‐Light Direct Conversion of Ethanol to 1,1‐Diethoxyethane and Hydrogen over a Non‐Precious Metal Photocatalyst

Contact Info

Product

Resources

About

Decorating geometry- and size-controlled sub-20 nm Pd nanocubes onto 2D TiO2 nanosheets for simultaneous H2 evolution and 1,1-diethoxyethane production

Abstract: The morphological characteristics of metal play a pivotal role in affecting the activity of metal–semiconductor composite photocatalysts for solar energy conversion.

Cited by 91 publications

References 86 publications

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO2 Nanotube Arrays@RGO/MoS2 Heterostructure

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO2 Nanotube Arrays@RGO/MoS2 Heterostructure

Stabilizing ultrasmall Au clusters for enhanced photoredox catalysis

Visible‐Light Direct Conversion of Ethanol to 1,1‐Diethoxyethane and Hydrogen over a Non‐Precious Metal Photocatalyst

Contact Info

Product

Resources

About

Decorating geometry- and size-controlled sub-20 nm Pd nanocubes onto 2D TiO₂ nanosheets for simultaneous H₂ evolution and 1,1-diethoxyethane production

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO₂ Nanotube Arrays@RGO/MoS₂ Heterostructure

Revealing the Double‐Edged Sword Role of Graphene on Boosted Charge Transfer versus Active Site Control in TiO₂ Nanotube Arrays@RGO/MoS₂ Heterostructure