Platinum Nanoparticles Anchored on Covalent Triazine Frameworks Modified Cordierite for Efficient Oxidation of Hydrogen Isotopes

Xu, Meiyun; Chen, Fulong; Wang, Tao; Yu, Bin; Zhao, Zhe; Zhou, Lei; Hua, Daoben

doi:10.1021/acsanm.2c04202

Cited by 5 publications

(2 citation statements)

References 46 publications

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“…However, excellent hydrogen isotope oxidation efficiency usually requires high temperatures, up to 150 °C, and catalytic efficiency typically decreases with increasing metal particle size due to the exothermic reaction . Xu et al integrated Pt nanoparticles by constructing a covalent triazine framework on cordierite to enhance the efficiency of hydrogen isotope oxidation . The Pt nanoparticles were uniformly dispersed on the catalyst, with diameters of 1.8–2.4 nm, and the study also determined the hydrogen conversion rate under varying temperature and space velocity conditions.…”

Section: Introductionmentioning

confidence: 99%

Insight into the Catalytic Oxidation Mechanism of Hydrogen Isotopes by Pt Clusters Confined by Silicalite-1

Wei,

Zhou,

Luo

et al. 2024

Inorg. Chem.

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Highly efficient removal of low concentrations of hydrogen isotope gas in air is crucial for the safe operation of nuclear energy plants. Herein, silicalite-1-confined Pt cluster catalysts were used for the catalytic oxidation of hydrogen isotopes, and the related catalytic mechanism was revealed. Increased temperature in direct hydrogen reduction treatment slightly increased the size of Pt clusters from 1.6 nm at 400 °C to 1.8 nm at 600 °C. The catalyst reduced at 600 °C exhibited excellent performance (99%) in hydrogen isotope oxidation at 75 °C, as well as high stability and catalytic efficiency in continuous and intermittent operation for 7200 min. X-ray absorbance spectroscopy confirmed the existence of Pt clusters in the catalysts, and the theoretical results showed that the total net charge was −0.07 e, indicating a slight charge transfer from the zeolite to the Pt atoms. The metal−support interaction thermally stabilized Pt clusters and altered the metal electronic structure, which enhanced the catalytic activity following a hydroperoxyl (OOH)-mediated route. Based on the low reaction temperature, efficient hydrogen conversion rate, and high stability, the silicalite-1-confined Pt cluster catalyst is expected to be used in hydrogen isotope oxidation treatment to achieve nuclear safety.

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Section: Introductionmentioning

confidence: 99%

Insight into the Catalytic Oxidation Mechanism of Hydrogen Isotopes by Pt Clusters Confined by Silicalite-1

Wei,

Zhou,

Luo

et al. 2024

Inorg. Chem.

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“…This is the case for materials with high spin-orbit coupling and positive spin hall angle, which promote a raise in the spin-to-charge current conversion. Remarkably, Platinum (Pt) seems to be the best solution for both protecting against oxidation [ 21 , 22 , 23 , 24 , 25 , 26 ] and promoting spin-to-charge conversion [ 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Longitudinal Spin Seebeck Effect Thermopiles Based on Flexible Co-Rich Amorphous Ribbons/Pt Thin-Film Heterostructures

Correa,

Svalov,

Ferreira

et al. 2023

Sensors

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Thermoelectric phenomena, such as the Anomalous Nernst and Longitudinal Spin Seebeck Effects, are promising for sensor applications in the area of renewable energy. In the case of flexible electronic materials, the request is even larger because they can be integrated into devices having complex shape surfaces. Here, we reveal that Pt promotes an enhancement of the thermoelectric response in Co-rich ribbon/Pt heterostructures due to the spin-to-charge conversion. Moreover, we demonstrated that the employment of the thermopiles configuration in this system increases the induced thermoelectric current, a fact related to the considerable decrease in the electric resistance of the system. By comparing present findings with the literature, we were able to design a flexible thermopile based on LSSE without the lithography process. Additionally, the thermoelectric voltage found in the studied flexible heterostructures is comparable to the ones verified for rigid systems.

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Construction of Pt─O Sites on Pt Nanoclusters in Silicalite‐1 Zeolite for Efficient Catalytic Oxidation of Hydrogen Isotope Gases

Wei,

Zhou,

Wang

et al. 2024

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The construction, use, and maintenance of tritium‐related equipment will inevitably produce tritium‐containing radioactive waste gas, and the production of efficient catalysts for tritium removal remains a difficult problem. Herein, silicalite‐1 zeolite with entrapped Pt nanoclusters is skillfully post‐oxidized at an appropriate temperature, building highly active Pt─O sites on the nanoclusters to achieve efficient oxidation of hydrogen isotopes at low temperatures. The designed Pt─O sites can directly participate in the oxidation reaction of hydrogen isotopes. Compared to the case without Pt─O sites, the presence of these sites significantly reduces the reaction energy barrier to 0.55 eV, enabling the catalyst to achieve a hydrogen conversion rate of 99% at a low temperature of 40 °C. Specifically, the O atoms consumed by the Pt─O sites in the reaction are replaced by O2 gas and this cycle repeats, which is consistent with the Mars‐van Krevelen (M–K) theory. This ensures efficient catalytic oxidation of hydrogen isotopes, and provides an astonishingly high conversion rate of 99% in the nearly 34 days restart performance test. The results of this study provide insights into the strategic design of efficient catalysts for hydrogen isotope oxidation.

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Platinum Nanoparticles Anchored on Covalent Triazine Frameworks Modified Cordierite for Efficient Oxidation of Hydrogen Isotopes

Cited by 5 publications

References 46 publications

Insight into the Catalytic Oxidation Mechanism of Hydrogen Isotopes by Pt Clusters Confined by Silicalite-1

Insight into the Catalytic Oxidation Mechanism of Hydrogen Isotopes by Pt Clusters Confined by Silicalite-1

Longitudinal Spin Seebeck Effect Thermopiles Based on Flexible Co-Rich Amorphous Ribbons/Pt Thin-Film Heterostructures

Construction of Pt─O Sites on Pt Nanoclusters in Silicalite‐1 Zeolite for Efficient Catalytic Oxidation of Hydrogen Isotope Gases

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