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首页> 外文期刊>Chemistry: A European journal >Ion-exchange-assisted synthesis of Pt-VC nanoparticles loaded on graphitized carbon: A high-performance nanocomposite electrocatalyst for oxygen-reduction reactions
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Ion-exchange-assisted synthesis of Pt-VC nanoparticles loaded on graphitized carbon: A high-performance nanocomposite electrocatalyst for oxygen-reduction reactions

机译：负载在石墨化碳上的Pt-VC纳米粒子的离子交换辅助合成：一种用于氧还原反应的高性能纳米复合电催化剂

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摘要

Carbide-based electrocatalysts are superior to traditional carbon-based electrocatalysts, such as the commercial Pt/C electrocatalysts, in terms of their mass activity and stability. Herein, we report a general approach for the preparation of a nanocomposite electrocatalyst of platinum and vanadium carbide nanoparticles that are loaded onto graphitized carbon. The nanocomposite, which was prepared in a localized and controlled fashion by using an ion-exchange process, was an effective electrocatalyst for the oxygen-reduction reaction (ORR). Both the stability and the durability of the Pt-VC/GC nanocomposite catalyst could be enhanced compared with the state-of-the-art Pt/C. This approach can be extended to the synthesis of other metal-carbide-based nanocatalysts. Moreover, this straightforward synthesis of high-performance composite nanocatalysts can be scaled up to meet the requirements for mass production. Nanocomposite electrocatalysts of platinum and vanadium carbide nanoparticles loaded onto graphitized carbon (Pt-VC/GC) can be prepared on a large scale in a localized and controlled fashion by an ion-exchange process. These electrocatalysts are effective for the oxygen-reduction reaction (ORR) and show enhanced electrocatalytic activity compared with the commercial Pt/C electrocatalyst (see figure).
机译：基于碳化物的电催化剂在质量活性和稳定性方面优于传统的基于碳的电催化剂，例如市售的Pt / C电催化剂。在本文中，我们报告了一种制备负载在石墨化碳上的铂和碳化钒纳米颗粒的纳米复合电催化剂的一般方法。通过使用离子交换过程以局部和受控方式制备的纳米复合材料，是用于氧还原反应（ORR）的有效电催化剂。与最新的Pt / C相比，可以提高Pt-VC / GC纳米复合催化剂的稳定性和耐久性。该方法可以扩展到其他基于金属碳化物的纳米催化剂的合成。此外，高性能合成纳米催化剂的这种直接合成可以按比例放大以满足大规模生产的要求。负载在石墨化碳上的铂和碳化钒纳米粒子的纳米复合电催化剂（Pt-VC / GC）可以通过离子交换过程以局部和受控的方式大规模制备。与市售Pt / C电催化剂相比，这些电催化剂对氧还原反应（ORR）有效，并显示出增强的电催化活性（见图）。

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