Spinel Mn鈥揅o Oxide in N-Doped Carbon Nanotubes as a Bifunctional Electrocatalyst Synthesized by Oxidative Cutting

详细信息    查看全文

• 作者：Anqi Zhao ; Justus Masa ; Wei Xia ; Artjom Maljusch ; Marc-Georg Willinger ; Guylhaine Clavel ; Kunpeng Xie ; Robert Schl枚gl ; Wolfgang Schuhmann ; Martin Muhler
• 刊名：Journal of the American Chemical Society
• 出版年：2014
• 出版时间：May 28, 2014
• 年：2014
• 卷：136
• 期：21
• 页码：7551-7554
• 全文大小：273K
• 年卷期：v.136,no.21(May 28, 2014)
• ISSN：1520-5126

文摘

The notorious instability of non-precious-metal catalysts for oxygen reduction and evolution is by far the single unresolved impediment for their practical applications. We have designed highly stable and active bifunctional catalysts for reversible oxygen electrodes by oxidative thermal scission, where we concurrently rupture nitrogen-doped carbon nanotubes and oxidize Co and Mn nanoparticles buried inside them to form spinel Mn鈥揅o oxide nanoparticles partially embedded in the nanotubes. Impressively high dual activity for oxygen reduction and evolution is achieved using these catalysts, surpassing those of Pt/C, RuO₂, and IrO₂ and thus raising the prospect of functional low-cost, non-precious-metal bifunctional catalysts in metal鈥揳ir batteries and reversible fuel cells, among others, for a sustainable and green energy future.