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首页> 美国卫生研究院文献>Nanomaterials >Cobalt Nanoparticles on Plasma-Controlled Nitrogen-Doped Carbon as High-Performance ORR Electrocatalyst for Primary Zn-Air Battery
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Cobalt Nanoparticles on Plasma-Controlled Nitrogen-Doped Carbon as High-Performance ORR Electrocatalyst for Primary Zn-Air Battery

机译：等离子体控制氮掺杂碳上的钴纳米颗粒作为一次锌空气电池的高性能ORR电催化剂

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Metal–air batteries and fuel cells have attracted much attention as powerful candidates for a renewable energy conversion system for the last few decades. However, the high cost and low durability of platinum-based catalysts used to enhance sluggish oxygen reduction reaction (ORR) at air electrodes prevents its wide application to industry. In this work, we applied a plasma process to synthesize cobalt nanoparticles catalysts on nitrogen-doped carbon support with controllable quaternary-N and amino-N structure. In the electrochemical test, the quaternary-N and amino-N-doped carbon (Q-A)/Co catalyst with dominant quaternary-N and amino-N showed the best onset potential (0.87 V vs. RHE) and highest limiting current density (−6.39 mA/cm ). Moreover, Q-A/Co was employed as the air catalyst of a primary zinc–air battery with comparable peak power density to a commercial 20 wt.% Pt/C catalyst with the same loading, as well as a stable galvanostatic discharge at −20 mA/cm for over 30,000 s. With this result, we proposed the synergetic effect of transitional metal nanoparticles with controllable nitrogen-bonding can improve the catalytic activity of the catalyst, which provides a new strategy to develop a Pt-free ORR electrocatalyst.
机译：在过去的几十年中，金属-空气电池和燃料电池已成为可再生能源转换系统的强大候选产品，引起了广泛关注。然而，用于增强空气电极处缓慢的氧还原反应（ORR）的铂基催化剂的高成本和低耐久性阻碍了其在工业上的广泛应用。在这项工作中，我们应用了等离子体工艺在具有可控制的季N和氨基N结构的氮掺杂碳载体上合成钴纳米颗粒催化剂。在电化学测试中，具有主要季铵和氨基N元素的季铵和氨基N掺杂碳（QA）/ Co催化剂表现出最佳的起始电势（相对于RHE为0.87 V）和最高的极限电流密度（- 6.39mA / cm 2）。此外，QA / Co用作一次锌-空气电池的空气催化剂，其峰值功率密度与市售20 wt。％Pt / C催化剂（具有相同的负载）相当，并且在-20 mA时具有稳定的恒电流放电/ cm超过30,000秒。以此结果，我们提出过渡金属纳米粒子与可控氮键的协同作用可以提高催化剂的催化活性，为开发无铂ORR电催化剂提供了新的策略。

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