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Porous three-dimensional network of Pd-Cu aerogel toward formic acid oxidation

机译：PD-Cu气凝胶的多孔三维网络对甲酸氧化

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摘要

New self-assembled architectures have received great interest in nanotechnology, and are a highly desired target in recent studies. Among self-assembled architectures, noble metal aerogels are an important class owing to their collective characters as well as widespread applications. The synthesis of noble metal aerogels still faces several obstacles such as long hydrogel creation time and complicated multistep strategies. In this paper, we propose an efficient and useful approach to create the three-dimensional network of a Pd-Cu aerogel. This way offers a number of advantages including one-pot synthesis, simplicity, and short time to prepare the hydrogel. The Pd-Cu aerogel was prepared by the reduction of H2PdCl4 and CuCl2 in the presence of sodium carbonate by using glyoxylic acid monohydrate as a reducing agent followed by supercritical CO2 drying. The Pd-Cu aerogel was applied as an anode catalyst for electrooxidation process of formic acid, and depicts much higher electrocatalytic activity and durability compared to the Pd/C. We believe that the exceptional three-dimensional nanostructures fabricated by this route are powerful and promising catalysts for application in direct formic acid fuel cells (DFAFCs), which may open great opportunities for widespread applications such as catalysis, sensors, optoelectronics, electrochemical energy systems, etc.
机译：新的自组装架构对纳米技术感兴趣，并且是最近的研究中的一个非常值的目标。在自组装的架构中，由于其集体人物以及广泛的应用，贵族金属气凝胶是一个重要的课程。贵族金属气凝胶的合成仍然面临着几种障碍，例如长水凝胶创建时间和复杂的多学室策略。在本文中，我们提出了一种有效和有用的方法来创建PD-Cu气凝胶的三维网络。这种方式提供了许多优点，包括单罐合成，简单性和短时间来制备水凝胶。通过使用乙醛酸一水合物作为还原剂在碳酸钠存在下，通过将H 2 PdCl4和CuCl 2减少来制备Pd-Cu气凝胶。随后是超临界CO 2干燥。将PD-Cu气凝胶用作甲酸电氧化过程的阳极催化剂，并与Pd / C相比，描绘了更高的电催化活性和耐久性。我们认为，该途径制造的特殊三维纳米结构是强大的含有甲酸燃料电池（DFAFCS）的催化剂，这可能对广泛应用，如催化作用，传感器，光电子，电化学能源系统开辟了很大的机会，等等。

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