Visible-light-induced electron density enrichment of the active sites in the core-satellite structured CuWO4@NiO for fast hydrogen generation from ammonia borane methanolysis

Liao, Jinyun; Wu, Qinglin; Ye, Xuan; Zhang, Tianwei; Li, Yuanzhong; Ren, Jianwei; Liu, Quanbing; Wu, Ming; Li, Hao

doi:10.1016/j.cej.2023.146599

Cited by 14 publications

(1 citation statement)

References 52 publications

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“…Consequently, the electrons are inclined to flow from CoP to NiCoP because of the lower work function of CoP, resulting in an electron-rich NiCoP and an electron-deficient CoP at the interface. [53,54] It is supposed that the electron-deficient component can promote the dissociation of the H 2 O molecule, while the electron-rich component favors the activation of the AB molecule in the hydrolysis of AB. [55] The catalytic performance of various samples for the hydrolytic dehydrogenation of AB was assessed at room temperature by measuring the volume of hydrogen released through the drainage method.…”

Section: Resultsmentioning

confidence: 99%

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

Chen,

Luo,

Zhang

et al. 2024

Chemistry A European J

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The exploration of stable, efficient, and low‐cost catalysts toward ammonia borane hydrolysis is of vital significance for the practical implementation of this hydrogen production technology. Integrating interface engineering and nano‐architecture engineering is a favorable strategy to elevate catalytic performance, as it can modify the electronic structure and provide sufficient active sites simultaneously. In this work, urchin‐like NiCoP/CoP heterostructures are prepared via a three‐step hydrothermal‐oxidation‐phosphorization synthesis route. It is demonstrated that the original Ni/Co molar ratio and the amount of phosphorus are crucial for adjusting the morphology, enhancing the exposed surface area, facilitating charge transfer, and modulating the adsorption and activation of H2O molecules. Consequently, the optimal Ni1Co2P heterostructure displays remarkable catalytic properties in the hydrolysis of ammonia borane with a turnover frequency (TOF) value of 30.3 molH2·min‐1·molmetal‐1, a low apparent activation energy of 25.89 kJ·mol‐1, and good stability. Furthermore, by combining infrared spectroscopy and isotope kinetics experiments, a possible mechanism for the hydrolysis of ammonia borane was proposed.

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Section: Resultsmentioning

confidence: 99%

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

Chen,

Luo,

Zhang

et al. 2024

Chemistry A European J

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Built‐in Electric Field in Yolk Shell CuO‐Co₃O₄@Co₃O₄ with Modulated Interfacial Charge to Facilitate Hydrogen Production from Ammonia Borane Methanolysis Under Visible Light

Li,

Liao,

Feng

et al. 2024

Adv Funct Materials

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Developing highly efficient and low‐cost catalysts is an endless challenge in the field of producing H2 from ammonia borane (AB). Herein, the manufacture of yolk‐shell CuO‐Co3O4@Co3O4 nanocomposites are reported by using Cu2O@CuO as a template, in which CuO‐Co3O4 is encapsulated into the Co3O4 hollow nanocubes. Due to the unique morphology and built‐in electric field (BIEF) induced by the CuO‐Co3O4 interface, the CuO‐Co3O4@Co3O4 nanocomposites display remarkable catalytic activity in AB methanolysis. The turnover frequency (TOF) is 24.8 min‐1 in the absence of light and significantly increases to 33.9 min‐1 when exposed to visible light. The experimental and theoretical calculations demonstrate that charge migration from CuO to Co3O4 results in the formation of dual active sites (Cu and Co sites) in charge of adsorption and activation of CH3OH and AB, respectively. Visible light‐induced acceleration is likely caused by type‐II heterojunction, which allows a large number of photogenerated electrons to accumulate in the CuO conduction band. This effectively activates the adsorbed CH3OH on the Cu site, rendering it easier to break the O−H bond. A plausible reaction mechanism involved the activation of the O−H bond of CH3OH, as the RDS is proposed according to the FT‐IR and kinetic isotope effect (KIE) experiments. This work offers an avenue to rationally design high‐performance yolk‐shell catalyst for rapid hydrogen production from AB methanolysis reaction under visible light.

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Nanosized Pd@Ag heterojunction with tunable shapes: Morphological modulation for improving plasma-mediated catalytic hydrogen evolution

Zhu,

Zhang,

Zhang

et al. 2024

Fuel

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Visible-light-induced electron density enrichment of the active sites in the core-satellite structured CuWO4@NiO for fast hydrogen generation from ammonia borane methanolysis

Cited by 14 publications

References 52 publications

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

Built‐in Electric Field in Yolk Shell CuO‐Co₃O₄@Co₃O₄ with Modulated Interfacial Charge to Facilitate Hydrogen Production from Ammonia Borane Methanolysis Under Visible Light

Nanosized Pd@Ag heterojunction with tunable shapes: Morphological modulation for improving plasma-mediated catalytic hydrogen evolution

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Visible-light-induced electron density enrichment of the active sites in the core-satellite structured CuWO4@NiO for fast hydrogen generation from ammonia borane methanolysis

Cited by 14 publications

References 52 publications

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

Regulation of Electronic Structures of the Urchin‐Like NiCoP/CoP Nanocatalysts for Fast Hydrogen Evolution

Built‐in Electric Field in Yolk Shell CuO‐Co3O4@Co3O4 with Modulated Interfacial Charge to Facilitate Hydrogen Production from Ammonia Borane Methanolysis Under Visible Light

Nanosized Pd@Ag heterojunction with tunable shapes: Morphological modulation for improving plasma-mediated catalytic hydrogen evolution

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Product

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Built‐in Electric Field in Yolk Shell CuO‐Co₃O₄@Co₃O₄ with Modulated Interfacial Charge to Facilitate Hydrogen Production from Ammonia Borane Methanolysis Under Visible Light