Nearly monodisperse Cu|pd alloyed Nanocrystals: Ultrasound induced stepwise thermoreduction in organic Medium, and catalytic alcoholysis for hydrogen evolution

Zhu, Yiming; Xu, Guoteng; Zhang, Jun; Li, Xiang; Wei, Xuefeng; Song, Kexing

doi:10.1016/j.fuel.2023.128628

Cited by 3 publications

(2 citation statements)

References 52 publications

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“…The high‐resolution XPS spectrum of the Pd 3d core‐level of the Pd/Al 2 O 3 catalyst (Figure 4(b)) shows two prominent peaks (blue‐colored) centered around 340.3 and 334.3 eV, which attributed to 3d 3/2 and 3d 5/2 regions of metallic Pd. The other additional peaks (orange‐colored) observed around 342.7 and 335.8 eV are attributed to 3d regions of PdO [27–30] …”

Section: Resultsmentioning

confidence: 99%

“…The other additional peaks (orangecolored) observed around 342.7 and 335.8 eV are attributed to 3d regions of PdO. [27][28][29][30] To calculate the activation energy (Ea # ) of the Pd/Al 2 O 3 catalyst in the MB hydrolysis, the catalytic reaction was performed at different temperatures ranging from 298 to 328 K (Figure 5(a)). As can be seen from the figure, the rate of H 2 production gradually increases with increasing temperature, and the rate constant values obtained from the slope of each line from Figure 5(a) are graphed to obtain Arrhenius plot (Figure 5(b).…”

Section: Resultsmentioning

confidence: 99%

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Hydrogen Production from Morpholine−Borane by Aluminum Oxide‐Supported Pd Nanoparticles

Oğuzyer,

Yurderi,

Zahmakıran

et al. 2023

ChemistrySelect

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Morpholine−borane (MB) is a promising hydrogen storage material and developing effective catalysts for the catalytic hydrolysis reaction of MB has become a fascinating topic in catalysis. Here, we report the preparation of Al2O3‐supported Pd nanoparticles (Pd/Al2O3) by an impregnation‐reduction method and their utilization as catalysts in the catalytic hydrolysis reaction of MB for hydrogen (H2) production. These Pd/Al2O3 are characterized by a combination of several advanced analytical techniques. Pd/Al2O3 catalysts with a mean diameter of 3.12±0.35 nm provide H2 production with a turnover frequency (TOF) value of 495.3 mol(H2) ⋅ molPd−1 ⋅ h−1 in the hydrolysis of MB in complete conversion at 298 K. Additionally, the activation energy (Ea#), activation enthalpy (ΔH#), and activation entropy (ΔS#) values of Pd/Al2O3 catalysts in the hydrolysis reaction of MB are calculated as 30.36 kJ ⋅ mol−1, 28.42 kJ ⋅ mol−1, and −158.52 J ⋅ mol−1 ⋅ K−1, respectively, from Arrhenius and Eyring‐Polanyi equations.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hydrogen Production from Morpholine−Borane by Aluminum Oxide‐Supported Pd Nanoparticles

Oğuzyer,

Yurderi,

Zahmakıran

et al. 2023

ChemistrySelect

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Porous silica supported Ag core-Pd shell composite: Seed-mediated stepwise reduction and tunable dispersion for boosting catalytic hydrogen evolution

Zhu

Zhang

et al. 2024

Fuel

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Localized Electron Redistribution in Methanol Molecules over the Sea Urchin-like Tricobalt Tetroxide/Copper Oxide Nanostructures for Fast Hydrogen Release

Liao,

Li,

Feng

et al. 2024

ACS Appl. Mater. Interfaces

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Catalytic methanolysis of ammonia borane (NH 3 BH 3 ) is a prospective technology in the field of hydrogen energy in which hydrogen production and hydrogen storage can be integrated together. The splitting of the O−H bond is identified as the rate-determining step (RDS) in this reaction. Thus, a deep understanding of the relationship between the electronic structure of the catalyst, especially the localized electron density of active sites, and the breaking behaviors of the O−H bond is of extreme importance for the rational design of robust catalysts for the reaction. In this work, sea urchin-like tricobalt tetroxide/copper oxide (Co 3 O 4 /CuO) nanostructures with rich oxygen vacancies (O v ) were fabricated by a simple synthetic route. In NH 3 BH 3 methanolysis, the optimal Co 3 O 4 /CuO sample exhibited ultrahigh catalytic activity with a turnover frequency (TOF) of 87.5 min −1 . Interestingly, when NH 3 BH 3 methanolysis was carried out under visible-light illumination, the TOF further increased to 116.4 min −1 , which is the highest TOF value among those of the noble-metal-free catalysts ever documented in the literature. Theoretical calculation results evidenced that the Cu site in the Co 3 O 4 /CuO sample was in charge of the adsorption and activation of methanol molecules. Both the O v and visible-light illumination can help electrons on the Cu site flow to the adsorbed methanol molecule, thus leading to localized electron redistribution of the methanol molecule and the extension of the O−H bond. The cooperation of O v and visible light makes splitting of the O−H bond easier, which is favorable for fast hydrogen release from NH 3 BH 3 methanolysis. This study helps us to gain an insight into the influence of localized electron redistribution of methanol molecules on the RDS, which conduces to the rational design of highly effective nanocatalysts. Moreover, the coinduction strategy for localized electron redistribution with oxygen vacancy engineering and visible-light illumination opens up a route to boost catalytic activity in NH 3 BH 3 methanolysis.

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Nearly monodisperse Cu|pd alloyed Nanocrystals: Ultrasound induced stepwise thermoreduction in organic Medium, and catalytic alcoholysis for hydrogen evolution

Cited by 3 publications

References 52 publications

Hydrogen Production from Morpholine−Borane by Aluminum Oxide‐Supported Pd Nanoparticles

Hydrogen Production from Morpholine−Borane by Aluminum Oxide‐Supported Pd Nanoparticles

Porous silica supported Ag core-Pd shell composite: Seed-mediated stepwise reduction and tunable dispersion for boosting catalytic hydrogen evolution

Localized Electron Redistribution in Methanol Molecules over the Sea Urchin-like Tricobalt Tetroxide/Copper Oxide Nanostructures for Fast Hydrogen Release

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