Manyuan Nichayanan, Kawasaki Hideya
Department of Chemistry and Materials Engineering, Kansai University 3-3-35, Yamate-cho, Suita Osaka 564-8680 Japan
RSC Adv. 2023 Oct 16;13(43):30273-30280. doi: 10.1039/d3ra06571e. eCollection 2023 Oct 11.
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.
室温下的镓基液态金属（LMs）因其独特的流体和催化性能组合，近年来在催化应用方面引起了全球的广泛关注。在液态金属中负载铂有望提高各种反应体系的催化性能。然而，用于镓基液态金属的铂负载方法尚未得到充分发展，以提高催化性能和铂的利用效率。在本研究中，开发了一种使用铂溅射沉积制备含铂液态金属（Pt(dep)-LMs）的新方法。Pt(dep)-LMs包含直径为0.89±0.6μm的分散良好的铂薄片。使用诸如亚甲基蓝（MB）还原和在酸性水溶液中制氢等模型反应，研究了铂负载量约为0.7 wt%的Pt(dep)-LMs的催化活性。与负载传统铂黑（约0.7 wt%）的液态金属相比，Pt(dep)-LMs表现出更高的MB还原率（三倍）和产氢量（三倍）。与Pt(dep)-LMs相反，铂负载量约为0.7 wt%的固态镓不催化这些反应。这些结果表明，在通过铂溅射制备的Pt(dep)-LMs中发生了铂活化，并且液态金属的流体性质增强了催化还原反应。因此，这些发现突出了铂沉积方法的卓越性能以及使用基于铂-液态金属催化剂的优势。
