Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China; Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China.
Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
J Colloid Interface Sci. 2018 Jul 15;522:264-271. doi: 10.1016/j.jcis.2018.03.039. Epub 2018 Mar 14.
Monodisperse hollow mesoporous PdCo alloy nanospheres are prepared via a simple galvanic replacement reaction. The as-prepared PdCo hollow nanospheres have small diameter, such as PdCo nanospheres of diameter about 25 nm and mesoporous shells about 4-5 nm. The PdCo hollow mesoporous nanospheres possess the largest electrochemical active surface areas (ECSA, 53.91 m g), mass activity (1488 mA mg) and specific activity (2.76 mA cm) towards to methanol oxidation relative to the PdCo, PdCo hollow mesoporous nanospheres and commercial Pd/C catalysts. Moreover, the activity of PdCo after long-term stability tests is still the best and even better than those of fresh PdCo and commercial Pd/C catalysts. The PdCo catalysts not only effectively reduce the Pd usage by forming hollow structure, but also fully realize the Pd-Co alloying effects for enhancing the methanol oxidation catalytic performance.
通过简单的电替换反应制备了单分散的中空介孔 PdCo 合金纳米球。所制备的 PdCo 中空纳米球具有小的直径，例如直径约为 25nm 的 PdCo 纳米球和 4-5nm 的介孔壳。与 PdCo、PdCo 中空介孔纳米球和商业 Pd/C 催化剂相比，PdCo 中空介孔纳米球具有最大的电化学活性表面积（ECSA，53.91m²mg）、质量活性（1488mAmg）和比活性（2.76mAcm），用于甲醇氧化。此外，PdCo 的活性在长期稳定性测试后仍然是最好的，甚至优于新鲜的 PdCo 和商业 Pd/C 催化剂。PdCo 催化剂不仅通过形成中空结构有效降低了 Pd 的使用量，而且还充分实现了 Pd-Co 合金化效应，以增强甲醇氧化催化性能。
