CuS co-catalyst modified hydrogenated SrTiO<sub>3</sub> nanoparticles as an efficient photocatalyst for H<sub>2</sub> evolution

Zhou, Diwen; Wang, Ganyu; Feng, Yuqing; Chen, Wenqian; Chen, Jinyi; Yu, Zhichong; Wang, Jiajun; Tang, Liang

doi:10.1039/d1dt00825k

Cited by 18 publications

(6 citation statements)

References 45 publications

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“…on the surface and lattice oxygen (O−Sr/Ti) in the SrTiO 3 crystals, respectively. 24 In agreement with the Sr 3d and Ti 2p spectra, the Pt 2+ presence shifted the above two O 1s peaks positively to the binding energy of 532.27 and 529.67 eV, respectively. For 0.1Pt 2+ -SrTiO 3 , one more peak was centered at 530.86 eV, corresponding to the Pt−O bonding.…”

Section: Resultssupporting

confidence: 75%

Strong Electronic Interaction Enables Enhanced Solar-Driven CO₂ Reduction into Selective CH₄ on SrTiO₃ with Photodeposited Pt²⁺ Sites

Lu,

He,

Zhu

et al. 2024

Inorg. Chem.

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Targeting selective CO 2 photoreduction into CH 4 remains a challenge due to the sluggish reaction kinetics and poor hydrogenation ability of the unstable intermediate. Here, the active Pt 2+ sites were photodeposited on the SrTiO 3 photocatalyst, which was well demonstrated to manipulate the CH 4 product selectivity. The results showed that SrTiO 3 mainly yielded the CO (6.98 μmol g −1 ) product with poor CH 4 (0.17 μmol g −1 ). With the Pt 2+ modification, 100% CH 4 selectivity could be obtained with an optimized yield rate of 8.07 μmol g −1 . The prominent enhancement resulted from the following roles: (1) the strong electronic interaction between the Pt 2+ cocatalyst and SrTiO 3 could prompt efficient separation of the photoelectron−hole pairs. (2) The Pt 2+ sites were active to capture and activate inert CO 2 into HCO 3− and CO 3 2− species and allowed fast *COOH formation with the lowered reaction barrier. (3) Compared with SrTiO 3 , the formed *CO species could be captured tightly on the Pt 2+ cocatalyst surface for generating the *CH 2 intermediate by the following electron−proton coupling reaction, thus leading to the CH 4 product with 100% selectivity.

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Section: Resultssupporting

confidence: 75%

Strong Electronic Interaction Enables Enhanced Solar-Driven CO₂ Reduction into Selective CH₄ on SrTiO₃ with Photodeposited Pt²⁺ Sites

Lu,

He,

Zhu

et al. 2024

Inorg. Chem.

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“…Coupling with a cocatalyst could also improve the photocatalytic activity of a semiconductor catalyst by facilitating charge separation and transfer, suppressing the recombination reaction of photogenerated electron–hole pairs, and accelerating the rate of water splitting redox reactions. Various metals and their oxides have been combined with SrTiO 3 as cocatalysts; however, some of these compounds include precious elements that make them impractical for widespread utilization. − As a result, developing catalytic assemblies based on earth-abundant metals could lead to the advancement of low-cost and noble-metal-free systems for water splitting. CoFe Prussian blue analogues (PBAs) are coordination polymers with a general formula of A x Co y [Fe(CN) 6 ].nH 2 O (where A is an alkali or an alkaline earth metal ion occupying the tetrahedral interstitial sites), which consist of metal ions connected through cyanide bridging ligand .…”

Section: Introductionmentioning

confidence: 99%

Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO₃ Core–Shell Structures for Solar-Driven Water Oxidation

Peighambardoust,

Sadigh Akbari,

Lomlu

et al. 2023

ACS Mater. Au

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This study presents a pioneering semiconductor-catalyst core–shell architecture designed to enhance photocatalytic water oxidation activity significantly. This innovative assembly involves the in situ deposition of CoFe Prussian blue analogue (PBA) particles onto SrTiO3 (STO) and blue SrTiO3 (bSTO) nanocubes, effectively establishing a robust p–n junction, as demonstrated by Mott–Schottky analysis. Of notable significance, the STO/PB core–shell catalyst displayed remarkable photocatalytic performance, achieving an oxygen evolution rate of 129.6 μmol g–1 h–1, with stability over an extended 9-h in the presence of S2O8 2– as an electron scavenger. Thorough characterization unequivocally verified the precise alignment of the band energies within the STO/PB core–shell assembly. Our research underscores the critical role of tailored semiconductor-catalyst interfaces in advancing the realm of photocatalysis and its broader applications in renewable energy technologies.

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“…Hence, it is vital that the solar energy utilization be expanded and the rapid charge recombination be minimized through the STO modification. To strengthen the photocatalytic efficiency of STO in visible light utilization, techniques such as the doping of metal ions, anion doping, loading of metal, and coupling of two semiconductors with large and small band gap energies have been examined and become available [8]. Among them, coupling with other semiconductors is an attractive approach to achieve a more efficient separation of photogenerated electrons and holes, allowing for the strengthening of photocatalytic efficiency.…”

Section: Introductionmentioning

confidence: 99%

Effect of CuO Loading on the Photocatalytic Activity of SrTiO3/MWCNTs Nanocomposites for Dye Degradation under Visible Light

et al. 2022

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In this study, we report on the preparation of copper oxide/strontium titanate/multi-walled carbon nanotube (CuO/STO/MWCNTs) nanocomposites and their photocatalytic activity for degradation of dye under visible light. The crystalline structures of the nanocomposites were investigated by an X-ray diffraction (XRD) technique, which explored the successful fabrication of CuO/STO/MWCNTs nanocomposites, and the cubic STO phase was formed in all samples. For the morphological study, the transmission electron microscope (TEM) technique was used, which had proved the successful preparation of CuO and STO nanoparticles. The energy dispersive X-ray spectroscopy (EDX), dark field scanning transmission electron microscope (DF-STEM-EDX mapping), and X-ray photoelectron spectra (XPS) analysis were performed to evidence the elemental composition of CuO/STO/MWCNTs nanocomposites. The optical characteristics were explored via UV–Vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL) techniques. These studies clearly indicate the effect of the presence of CuO and MWCNTs on the visible absorption of the CuO/STO/MWCNTs nanocomposites. The photocatalytic activity of CuO/STO/MWCNTs nanocomposites was evaluated by the degradation of methylene blue (MB) dye under visible light irradiation, following first-order kinetics. Among the different x% CuO/STO/MWCNTs nanocomposites, the 5 wt.% CuO/STO/MWCNTs nanocomposites showed the highest photocatalytic efficiency for the degradation of MB dye. Moreover, the 5% CuO/STO/MWCNTs showed good stability and recyclability after three consecutive photocatalytic cycles. These results verified that the optimized nanocomposites can be used for photocatalytic applications, especially for dye degradation under visible light.

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CuS co-catalyst modified hydrogenated SrTiO₃ nanoparticles as an efficient photocatalyst for H₂ evolution

Abstract: CuS/STO-350 complexes exhibited photocatalytic hydrogen evolution activity superior to the pristine SrTiO3.

Cited by 18 publications

References 45 publications

Strong Electronic Interaction Enables Enhanced Solar-Driven CO₂ Reduction into Selective CH₄ on SrTiO₃ with Photodeposited Pt²⁺ Sites

Strong Electronic Interaction Enables Enhanced Solar-Driven CO₂ Reduction into Selective CH₄ on SrTiO₃ with Photodeposited Pt²⁺ Sites

Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO₃ Core–Shell Structures for Solar-Driven Water Oxidation

Effect of CuO Loading on the Photocatalytic Activity of SrTiO3/MWCNTs Nanocomposites for Dye Degradation under Visible Light

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CuS co-catalyst modified hydrogenated SrTiO3 nanoparticles as an efficient photocatalyst for H2 evolution

Abstract: CuS/STO-350 complexes exhibited photocatalytic hydrogen evolution activity superior to the pristine SrTiO3.

Cited by 18 publications

References 45 publications

Strong Electronic Interaction Enables Enhanced Solar-Driven CO2 Reduction into Selective CH4 on SrTiO3 with Photodeposited Pt2+ Sites

Strong Electronic Interaction Enables Enhanced Solar-Driven CO2 Reduction into Selective CH4 on SrTiO3 with Photodeposited Pt2+ Sites

Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO3 Core–Shell Structures for Solar-Driven Water Oxidation

Effect of CuO Loading on the Photocatalytic Activity of SrTiO3/MWCNTs Nanocomposites for Dye Degradation under Visible Light

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CuS co-catalyst modified hydrogenated SrTiO₃ nanoparticles as an efficient photocatalyst for H₂ evolution

Strong Electronic Interaction Enables Enhanced Solar-Driven CO₂ Reduction into Selective CH₄ on SrTiO₃ with Photodeposited Pt²⁺ Sites

Strong Electronic Interaction Enables Enhanced Solar-Driven CO₂ Reduction into Selective CH₄ on SrTiO₃ with Photodeposited Pt²⁺ Sites

Tunable Photocatalytic Activity of CoFe Prussian Blue Analogue Modified SrTiO₃ Core–Shell Structures for Solar-Driven Water Oxidation