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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >Non-noble bimetallic alloy encased in nitrogen-doped nanotubes as a highly active and durable electrocatalyst for oxygen reduction reaction
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Non-noble bimetallic alloy encased in nitrogen-doped nanotubes as a highly active and durable electrocatalyst for oxygen reduction reaction

机译：在氮掺杂纳米管中包装的非贵金属双金属合金作为高活性和耐用的电催化剂，用于氧还原反应

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Exploring highly active, cost-effective and durable oxygen reduction reaction (ORR) electrocatalysts as substitutes for the rare platinum -based catalysts is of great significance in energy conversion and storage devices, such as alkaline fuel cells, metal-air batteries, etc. Herein, we fabricated a new type ORR electrocatalyst of Ni-Co nanocrystal alloy encapsulated in N-doped carbon nanotubes (NCNTs) through a facile, scalable route utilizing nickel acetate and cobalt chloride as metallic Ni and Co precursors, thiourea as a nitrogen and carbon source, respectively, under a Ni/Co atomic ratio of 3:7 at 700 degrees C. The obtained nanocomposite catalyst NiCo@NCNT-700 exhibited an outstanding ORR activity close to that of the state-of-the-art Pt/C catalyst and superior operational durability under alkaline conditions, which could be attributed to the co-contributions among the uniformly distributed Ni-Co alloy nanoparticles, graphitic NCNTs and the formation of Co-N species. This work provides a new insight for the rational design and development of efficient non-noble metal electrocatalysts by integrating electrochemically active units into the nanocomposite for challenging electrochemical energy-related technologies. (C) 2016 Elsevier Ltd. All rights reserved.
机译：探索高活性，成本效率和耐用的氧还原反应（ORR）电催化剂作为稀有铂的催化剂的替代品在能量转换和储存装置中具有重要意义，例如本文碱性燃料电池，金属空气电池等。 ，我们通过适用于金属Ni和Co前体，硫脲作为氮气和碳源，制造了一种新的Ni-Co纳米管（NCNT）中的Ni-Co纳米纳米（NCNT）中的Ni-Co纳米纳米管（NCNT）中的Ni-Co纳米管（NCNT）中的新型ORR电催化剂。作为氮气和碳源，硫脲分别在700℃下的Ni / Co原子比下为3：7。所得纳米复合催化剂NiCO @ NCNT-700呈现出近于最先进的PT / C催化剂的优异锻造活性和碱性条件下的优异操作耐久性，其可归因于均匀分布的Ni-Co合金纳米粒子，石墨NCNT和CO-N物种的形成。这项工作通过将电化学活性单元集成到纳米复合材料中，为高效的非贵金属电催化剂进行了高效设计和开发的新洞察力，以挑战电化学能量相关技术。 （c）2016 Elsevier Ltd.保留所有权利。

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