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首页> 外文期刊>ACS applied materials & interfaces >Catalytic Palladium Film Deposited by Scalable Low-Temperature Aqueous Combustion
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Catalytic Palladium Film Deposited by Scalable Low-Temperature Aqueous Combustion

机译：通过可伸缩的低温含水燃烧沉积催化钯薄膜

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This article describes a novel method for depositing a dense, high quality palladium thin film-via a one-step aqueous combustion process which can be easily scaled up. Film deposition of Pd from aqueous solutions by conventional chemical or electrochemical methods is inhibited by hydrogen embrittlement, thus resulting in a brittle palladium film. The method outlined in this work allows a direct aqueous solution deposition of a mirror-bright, durable Pd film on substrates including glass and glassy carbon. This simple procedure has many advantages including a very high deposition rate (>10 cm(2) min(-1)) and a relatively low deposition temperature (250 degrees C), which makes it suitable for large-scale industrial applications. Although preparation of various high-quality oxide films has been successfully accomplished-via solution combustion synthesis (SCS) before, this article presents the first report on direct SCS production of a metallic film. The mechanism of Pd film formation is discussed with the identification of a complex formed between palladium nitrate and glycine at low temperature. The catalytic properties and stability of films are successfully tested in alcohol electrooxidation and electrochemical oxygen reduction reaction. It was observed that combustion deposited Pd film on a glassy carbon electrode showed excellent catalytic activity in ethanol oxidation without using any binder or additive. We also report for the first time the concept of a reusable "catalytic flask" as illustrated by the Suzuki-Miyaura cross-coupling reaction. The Pd film uniformly covers the inner walls of the flask and eliminates the catalyst separation step. We believe the innovative concept of a reusable catalytic flask is very promising and has the required features to become a commercial product in the future.
机译：本文介绍了一种用于沉积密集的高品质钯薄膜的新方法 - 通过一步水性燃烧过程可以容易地缩放。通过常规化学或电化学方法从水溶液中磷沉积Pd，通过氢气脆化抑制，从而导致脆性钯膜。该工作中概述的方法允许在包括玻璃和玻璃碳的基板上的镜面明亮的耐用Pd膜的直接水溶液沉积。这种简单的程序具有许多优点，包括非常高的沉积速率（> 10cm（2）分钟（-1））和相对低的沉积温度（250℃），这使其适用于大规模的工业应用。虽然在通过溶液燃烧合成（SCS）之前成功地完成了各种高质量氧化膜的制备，但本文介绍了关于金属膜的直接SCS产生的第一个报告。通过在低温下鉴定在硝酸钯和甘氨酸之间形成的复合物来讨论Pd成膜的机制。在醇电氧化和电化学氧还原反应中成功地测试薄膜的催化性能和稳定性。观察到玻璃碳电极上的燃烧沉积Pd膜在乙醇氧化中显示出优异的催化活性，而不使用任何粘合剂或添加剂。我们还报告了第一次可重复使用的“催化瓶”的概念，如Suzuki-miyaura交叉偶联反应所示。 Pd膜均匀地覆盖烧瓶的内壁，并消除催化剂分离步骤。我们相信可重复使用的催化烧瓶的创新概念非常有前途，并拥有未来成为商业产品的所需功能。

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