State Key Laboratory of Optoelectronic Materials and Technologies, School of Physics and Engineering, Sun Yat-sen University, 135 Xingang Road, Guangzhou 510275, PR China.
J Am Chem Soc. 2012 Feb 1;134(4):1954-7. doi: 10.1021/ja2093053. Epub 2012 Jan 20.
Nanocomposites consisting of the bimetallic carbide Co(6)Mo(6)C(2) supported on graphitic carbon ((g)C) were synthesized in situ by an anion-exchange method for the first time. The Co(6)Mo(6)C(2)/(g)C nanocomposites were not only chemically stable but also electrochemically stable. The catalyst prepared by loading Pt nanoparticles onto Co(6)Mo(6)C(2)/(g)C was evaluated for the oxygen reduction reaction in acidic solution and showed superior activity and stability in comparison with commercial Pt/C. The higher mass activity of the Pt-Co(6)Mo(6)C(2)/(g)C catalyst indicated that less Pt would be required for the same performance, which in turn would reduce the cost of the fuel cell electrocatalyst. The method reported here will promote broader interest in the further development of other nanostructured materials for real-world applications.
首次通过阴离子交换法原位合成了负载在石墨碳（(g)C）上的双金属碳化物 Co(6)Mo(6)C(2)的纳米复合材料。Co(6)Mo(6)C(2)/(g)C 纳米复合材料不仅化学稳定，而且电化学稳定。将 Pt 纳米颗粒负载在 Co(6)Mo(6)C(2)/(g)C 上制备的催化剂在酸性溶液中用于氧还原反应，与商业 Pt/C 相比表现出更高的活性和稳定性。Pt-Co(6)Mo(6)C(2)/(g)C 催化剂具有更高的质量活性，表明在相同性能下所需的 Pt 更少，从而降低了燃料电池电催化剂的成本。这里报道的方法将促进人们进一步开发其他用于实际应用的纳米结构材料的兴趣。
