<br>镓基室温液态金属中的活性铂，用于增强还原反应,RSC Advances

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镓基室温液态金属中的活性铂，用于增强还原反应
RSC Advances ( IF 3.9 ) Pub Date : 2023-10-16 , DOI: 10.1039/d3ra06571e
Nichayanan Manyuan ₁ , Hideya Kawasaki ₁

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室温镓基液态金属（LMs）因其独特的流体和催化特性组合而最近在催化中的应用引起了全世界的广泛关注。LM 中的铂负载有望提高各种反应体系的催化性能。然而，用于 Ga-based LMs 的 Pt 负载方法尚未得到充分开发，无法提高催化性能和 Pt 利用效率。在本研究中，开发了一种使用 Pt 溅射沉积（Pt（dep）-LMs）制备 Pt 掺入 LMs 的新方法。Pt（dep）-LMs 包含直径为 0.89 ± 0.6 μm 的分散良好的 Pt 薄片。使用亚甲蓝（MB）还原和在酸性水溶液中制氢等模型反应研究了 Pt 负载量为 ∼0.7 wt% 的 Pt（dep）-LM 的催化活性。与负载传统铂黑的改性活物料（∼0.7 wt%）相比，Pt（dep）-LM 显示出更高的 MB 还原率（三倍）和产氢量（三倍）。与 Pt（dep）-LMs 相比，Pt 负载量为 ∼0.7 wt% 的固体基 Ga 不会催化反应。这些结果表明，Pt 溅射制备的 Pt（dep）-LMs 中发生了 Pt 活化，并且 LMs 的流体特性增强了催化还原反应。因此，这些发现突出了 Pt 沉积方法的卓越性能和使用 Pt-LM 基催化剂的优势。

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Activated platinum in gallium-based room-temperature liquid metals for enhanced reduction reactions

Room-temperature gallium-based liquid metals (LMs) have recently attracted significant attention worldwide for application in catalysis because of their unique combination of fluidic and catalytic properties. Platinum loading in LMs is expected to enhance the catalytic performance of various reaction systems. However, Pt-loaded methods for Ga-based LMs have not yet been sufficiently developed to improve the catalytic performance and Pt utilization efficiency. In this study, a novel method for the fabrication of Pt-incorporated LMs using Pt sputter deposition (Pt(dep)-LMs) was developed. The Pt(dep)-LMs contained well-dispersed Pt flakes with diameters of 0.89 ± 0.6 μm. The catalytic activity of the Pt(dep)-LM with a Pt loading of ∼0.7 wt% was investigated using model reactions such as methylene blue (MB) reduction and hydrogen production in an acidic aqueous solution. The Pt(dep)-LMs showed a higher MB reduction rate (three times) and hydrogen production (three times) than the LM loaded with conventional Pt black (∼0.7 wt%). In contrast to the Pt(dep)-LMs, solid-based Ga with a Pt loading of ∼0.7 wt% did not catalyze the reactions. These results demonstrate that Pt activation occurred in the Pt(dep)-LMs fabricated by Pt sputtering, and that the fluidic properties of the LMs enhanced the catalytic reduction reactions. Thus, these findings highlight the superior performance of the Pt deposition method and the advantages of using Pt-LM-based catalysts.

更新日期：2023-10-16

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