State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, 135 Xingang Road, Guangzhou, 510275, PR China.
Chemistry. 2012 Jul 2;18(27):8490-7. doi: 10.1002/chem.201200496. Epub 2012 Jun 1.
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.
基于碳化钨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，如商业 Pt/C 电催化剂。在此，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材料电催化剂的通用方法。该纳米复合材料通过离子交换过程以局部和受控的方式制备，是一种有效的氧还原反应（ORR）电催化剂。与最先进的 Pt/C 相比，Pt-VC/GC 纳米复合材料催化剂的稳定性和耐久性都得到了提高。这种方法可以扩展到其他金属碳化物基纳米催化剂的合成。此外，这种制备高性能复合纳米催化剂的简单方法可以扩展到满足大规模生产的要求。
