Spinel Mn–Co Oxide in N-Doped Carbon Nanotubes as a Bifunctional Electrocatalyst Synthesized by Oxidative Cutting,Journal of the American Chemical Society

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Spinel Mn–Co Oxide in N-Doped Carbon Nanotubes as a Bifunctional Electrocatalyst Synthesized by Oxidative Cutting
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2014-05-14 , DOI: 10.1021/ja502532y
Anqi Zhao ₁ , Justus Masa ₂ , Wei Xia ₁ , Artjom Maljusch ₂ , Marc-Georg Willinger ₃ , Guylhaine Clavel ₃ , Kunpeng Xie ₁ , Robert Schlögl ₃ , Wolfgang Schuhmann ₂ , Martin Muhler ₁

Affiliation

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-Co 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-air batteries and reversible fuel cells, among others, for a sustainable and green energy future.

中文翻译：

N掺杂碳纳米管中的尖晶石Mn-Co氧化物作为氧化切割合成的双功能电催化剂

用于氧还原和放出的非贵金属催化剂臭名昭著的不稳定性是其实际应用的唯一未解决的障碍。我们通过氧化热裂解为可逆氧电极设计了高度稳定和活性的双功能催化剂，我们同时使掺氮碳纳米管破裂并氧化埋在其中的 Co 和 Mn 纳米颗粒，形成部分嵌入纳米管中的尖晶石 Mn-Co 氧化物纳米颗粒。使用这些催化剂实现了令人印象深刻的氧还原和析出双重活性，超过了 Pt/C、RuO2 和 IrO2，从而提高了功能性低成本、非贵金属双功能催化剂在金属-空气电池和可逆燃料电池等，以实现可持续和绿色能源的未来。

更新日期：2014-05-14

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