Douk Abdollatif Shafaei, Farsadrooh Majid, Damanigol Farzane, Moghaddam Alireza Ansari, Saravani Hamideh, Noroozifar Meissam
Department of Chemistry, University of Sistan and Baluchestan P. O. Box 98135-674 Zahedan Iran
RSC Adv. 2018 Jun 28;8(42):23539-23545. doi: 10.1039/c8ra03718c. eCollection 2018 Jun 27.
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 HPdCl and CuCl in the presence of sodium carbonate by using glyoxylic acid monohydrate as a reducing agent followed by supercritical CO 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,
新型自组装结构在纳米技术领域引起了极大的关注，并且是近期研究中备受期待的目标。在自组装结构中，贵金属气凝胶因其集体特性以及广泛的应用而成为重要的一类。贵金属气凝胶的合成仍然面临一些障碍，例如水凝胶形成时间长和多步策略复杂。在本文中，我们提出了一种有效且实用的方法来构建钯 - 铜气凝胶的三维网络。这种方法具有许多优点，包括一锅合成、操作简单以及制备水凝胶的时间短。通过在碳酸钠存在下，使用一水合乙醛酸作为还原剂还原氯钯酸和氯化铜，随后进行超临界二氧化碳干燥来制备钯 - 铜气凝胶。钯 - 铜气凝胶被用作甲酸电氧化过程的阳极催化剂，与钯/碳相比，表现出更高的电催化活性和耐久性。我们相信，通过这种途径制造的特殊三维纳米结构是用于直接甲酸燃料电池（DFAFC）的强大且有前景的催化剂，这可能为催化、传感器、光电子学、电化学能量系统等广泛应用带来巨大机遇。
