Pt nanoparticles exhibit good catalytic performance for the hydrogenation of phenol. However, the supported Pt nanoparticles often encounter leakage and growth in the reaction process. Herein, a confined Pt catalyst is elaborately designed and prepared by atomic layer deposition template-assisted method. The specific preparation process is as follows. ZnO single crystal nanowires are used as the sacrificed templates, and the sequential deposition of Pt nanoparticles (20 cycles) and TiO₂ layer (300 cycles) on ZnO nanowires templates by atomic layer deposition (ALD) is conducted, followed by removal of ZnO nanowires using acetic acid. The characterization results demonstrate that Pt nanoparticles have been imbedded into the inter wall of titanium oxide nanotubes. Compared with the supported Pt nanoparticles, the confined Pt nanoparticles exhibit enhanced catalytic activity and stability for phenol hydrogenation. TEM, XPS and CO chemisorption characterization results confirm that the confined catalyst possesses stronger Pt-TiO₂ interaction, resulting in the improved catalytic performance.

Graphic Abstract

Present here is the preparation of confined Pt catalyst by atomic layer deposition for the enhanced catalytic performance of the phenol hydrogenation. The high activity and good stability under the mild reaction conditions of this confined catalyst prepared by atomic layer deposition may have application prospect in industrialization.

中文翻译：

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通过原子层沉积提高苯酚氢化催化性能的 TiO2 纳米管中的铂纳米粒子

Pt纳米颗粒对苯酚的加氢表现出良好的催化性能。然而，负载的 Pt 纳米粒子在反应过程中经常会遇到泄漏和生长。在此，通过原子层沉积模板辅助方法精心设计和制备了一种受限的 Pt 催化剂。具体制备过程如下。ZnO 单晶纳米线用作牺牲模板，Pt 纳米颗粒（20 个循环）和 TiO ₂的顺序沉积通过原子层沉积 (ALD) 在 ZnO 纳米线模板上进行层（300 次循环），然后使用乙酸去除 ZnO 纳米线。表征结果表明，Pt 纳米颗粒已经嵌入到氧化钛纳米管的内壁中。与负载的 Pt 纳米粒子相比，受限的 Pt 纳米粒子表现出增强的苯酚氢化催化活性和稳定性。TEM、XPS 和 CO 化学吸附表征结果证实，受限催化剂具有更强的 Pt-TiO ₂相互作用，从而提高了催化性能。

图形摘要

这里介绍的是通过原子层沉积制备受限 Pt 催化剂，以提高苯酚氢化的催化性能。这种通过原子层沉积制备的受限催化剂在温和反应条件下的高活性和良好的稳定性可能具有工业化应用前景。