Precise regulation of the wettability of Pt/CNTs by atomic layer deposition-based ozone pulse strategy for enhanced catalytic hydrogenation performance in aqueous phase
Precise regulation of the wettability of Pt/CNTs by atomic layer deposition-based ozone pulse strategy for enhanced catalytic hydrogenation performance in aqueous phase
复制标题
通过基于原子层沉积的臭氧脉冲策略精确调节 Pt/CNT 的润湿性，以增强水相催化加氢性能
DOI：
10.1016/j.carbon.2021.12.037
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发表时间：
2022
期刊：
影响因子：
10.9
通讯作者：
Yong Qin
中科院分区：
文献类型：
--
作者：
Shuangfeng Xing;Zhe Gao;Zhengxing Lv;Shichao Zhao;Mi Xiong;Jianyuan Zhang;Guofu Wang;Yong Qin
非均相催化剂的润湿性对其性能起着至关重要的作用。开发具有可调润湿性的非均相催化剂以优化催化性能是高度期望的。然而，为了设计和开发高性能催化剂，精确调节催化剂的润湿性仍然具有挑战性。在这里，我们介绍了一个简单的原子层沉积为基础的臭氧脉冲（ALD-O3 pulse）的策略，以定制的Pt/CNTs的表面润湿性。催化剂的接触角可以通过控制ALD-O3脉冲循环次数来精确调节。对于4-硝基苯酚的加氢反应，经ALD-O3脉冲处理的催化剂相对于未处理的催化剂活性有所提高。优化后的样品（200 O3-Pt/CNTs）的周转频率是未处理的Pt/CNTs的两倍以上。详细的分析表明，适当的润湿性200 O3-Pt/CNTs有利于平衡供应的4-硝基苯酚和氢分子的Pt位，从而提高催化活性。ALD-O3脉冲策略具有一定的推广性，可应用于许多其他多相反应。
The wettability of heterogeneous catalysts plays a crucial role in their performance. Developing heterogeneous catalysts with tunable wettability to optimize catalytic performances is highly desired. However, it remains challenging to precisely regulate the wettability of the catalyst for the design and development of high-performance catalysts. Here, we introduce a facile atomic layer deposition-based ozone pulse (ALD-O3pulse) strategy to tailor the surface wettability of Pt/CNTs. The contact angle of the catalyst can be precisely regulated by controlling the ALD-O3pulse cycle numbers. For the hydrogenation reaction of 4-nitrophenol, catalysts with ALD-O3pulse treatment enhanced the catalytic activities with respect to their untreated counterpart. The turnover frequency of the optimized sample (200O3–Pt/CNTs) is more than twice the value of the untreated Pt/CNTs. Detailed analyses reveal that the appropriate wettability of 200O3–Pt/CNTs facilitates a balanced supply of 4-nitrophenol and hydrogen molecules to Pt sites, thus enhancing the catalytic activity. The ALD-O3pulse strategy is generalizable and can be applied to many other heterogeneous reactions.