铜含量对钴（χ）铜（y）合金纳米颗粒修饰的碳纳米纤维甲醇氧化电催化活性的影响。

Influence of copper content on the electrocatalytic activity toward methanol oxidation of Co(χ)Cu(y) alloy nanoparticles-decorated CNFs.

作者信息

Ghouri Zafar Khan, Barakat Nasser A M, Kim Hak Yong

机构信息

Advanced Materials Institute for BIN Convergence, Department of BIN Convergence Technology, Chonbuk National University, Jeonju 561-756, Republic of Korea.

Department of Organic materials &Fiber Engineering, Chonbuk National University, Jeonju 561-756, Republic of Korea.

出版信息

Sci Rep. 2015 Nov 16;5:16695. doi: 10.1038/srep16695.

In this study, CoCu alloy nanoparticles-incorporated carbon nanofibers are introduced as effective non precious electrocatalyst for methanol oxidation in alkaline medium. The introduced electrocatalyst has been synthesized by simple and effective process; electrospinning. Typically, calcination, in nitrogen atmosphere, of electrospun nanofibers composed of cobalt acetate, copper acetate and poly (vinyl alcohol) leads to form carbon nanofibers decorated by CoCu nanoparticles. The nanofibrous morphology and alloy structure have been confirmed by SEM, TEM and XRD analyses. Investigation of the electrocatalytic activity indicates that copper content has strong influence, the alloy nanoparticles having the composition Cu5%Co95% showed distinct high performance; 100 times higher than other formulations. Overall, the introduced study revealed the veil about the distinct role of copper in enhancing the electrocatalytic activity of cobalt-based materials.

在本研究中，引入了负载钴铜合金纳米颗粒的碳纳米纤维，作为碱性介质中甲醇氧化的有效非贵金属电催化剂。所引入的电催化剂通过简单有效的静电纺丝工艺合成。通常，在氮气气氛中对由醋酸钴、醋酸铜和聚乙烯醇组成的电纺纳米纤维进行煅烧，会形成由钴铜纳米颗粒修饰的碳纳米纤维。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）和X射线衍射（XRD）分析证实了纳米纤维的形态和合金结构。电催化活性研究表明，铜含量有很大影响，组成成分为Cu5%Co95%的合金纳米颗粒表现出显著的高性能，比其他配方高出100倍。总体而言，所引入的研究揭示了铜在增强钴基材料电催化活性方面独特作用的面纱。