Li Bing, Zhu Rongmei, Xue Huaiguo, Xu Qiang, Pang Huan
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, China; AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory (ChEM-OIL), Yoshida, Sakyo-ku, Kyoto 606-8501, Japan.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225002 Jiangsu, China.
J Colloid Interface Sci. 2020 Mar 15;563:328-335. doi: 10.1016/j.jcis.2019.12.061. Epub 2019 Dec 20.
Two dimensional (2D) ultrathin nonprecious metal based catalysts show excellent electrocatalytic activities, due to the larger surface areas, more catalytic sites and more interconnected electron-transfer access than their bulk counterparts. Here, we synthesized cobalt pyrophosphate (CoPO) nanosheets with different thickness by a simple and efficient one-step hydrothermal process. The catalytic performance of the obtained CoPO was investigated via diverse electrochemical measurement. Due to the unique 2D structure and the flexible coordination of pyrophosphate group, the as-prepared CoPO catalyst had excellent electrocatalytic performance and good stability, which could rank among the most active nonprecious metal catalysts for oxygen evolution reaction and oxygen reduction reaction. In addition, the ultrathin CoPO nanosheets exhibited good performance as the air cathode catalyst for zinc air batteries.
二维（2D）超薄非贵金属基催化剂表现出优异的电催化活性，这是因为与它们的块状对应物相比，其具有更大的表面积、更多的催化位点以及更多相互连接的电子转移通道。在此，我们通过一种简单高效的一步水热法合成了不同厚度的焦磷酸钴（CoPO）纳米片。通过多种电化学测量方法研究了所得CoPO的催化性能。由于独特的二维结构和焦磷酸基团的灵活配位，所制备的CoPO催化剂具有优异的电催化性能和良好的稳定性，在用于析氧反应和氧还原反应的最活跃非贵金属催化剂中名列前茅。此外，超薄CoPO纳米片作为锌空气电池的空气阴极催化剂表现出良好的性能。
