Enhanced Oxygen Reduction Catalysis of Carbon Nanohybrids from Nitrogen-Rich Edges,Langmuir

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Enhanced Oxygen Reduction Catalysis of Carbon Nanohybrids from Nitrogen-Rich Edges
Langmuir ( IF 3.7 ) Pub Date : 2020-11-11 , DOI: 10.1021/acs.langmuir.0c01899
Jinquan Chang _{1,

2} , Luting Song ₁ , Cheng Liang _{1,

2} , Yuanqing Xu _{1,

2} , Weibiao Wang _{1,

2} , Wenyu Jiang _{1,

2} , Yanhong Ma ₁ , Yong Zhang _{1,

2}

Affiliation

The edge doping effect would help improve the carbon-based electrocatalysis. Herein, we present an all-mechanical technique for the fabrication of cut, exfoliated N-doped carbon nanotubes (C, E-N-CNTs). Such nanohybrids with an edge-N-rich structure are obtained through sequential doping and mechanical treatments of the pristine bulk-CNTs. The C, E-N-CNT/carbon black (C, E-N-CNT/C) demonstrates exciting oxygen reduction reaction (ORR) electrocatalysis with exceptionally low-onset potential (E₀, 913 mV versus RHE) and satisfactory half-wave potential (E_1/2, merely −7.3 mV shift compared with that of commercial 20% platinum/C (Pt/C)). Besides, the C, E-N-CNT/C presents significantly enhanced durability and tolerance in chronoamperometry test with methanol injection compared with the Pt/C. Our work would facilitate the mass production and full exploration of nonmetallic electrocatalysts.

中文翻译：

来自富氮边缘的碳纳米杂化物的增强的氧还原催化作用

边缘掺杂效应将有助于改善碳基电催化作用。在这里，我们提出了一种全机械技术，用于制造切割的，剥离的N型掺杂碳纳米管（C，EN-CNT）。通过对原始本体CNT进行顺序掺杂和机械处理，可以获得具有富N边缘结构的纳米杂化物。的C，EN-CNT /炭黑（C，EN-CNT / C）展示了令人兴奋的氧还原反应（ORR）电催化具有异常低开始电位（ê ₀，913毫伏与RHE）和满意的半波电势（Ë _1/2与商用20％铂/ C（Pt / C）相比，仅-7.3 mV的偏移。此外，与Pt / C相比，C，EN-CNT / C在使用甲醇注入的计时电流法测试中具有显着增强的耐久性和耐受性。我们的工作将促进非金属电催化剂的大规模生产和全面开发。

更新日期：2020-11-25

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