Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education of China, School of Physics and Technology, Wuhan University , Wuhan 430072, PR China.
ACS Appl Mater Interfaces. 2017 Oct 18;9(41):35927-35935. doi: 10.1021/acsami.7b12403. Epub 2017 Oct 9.
Porous CoSe on carbon cloth is prepared from a cobalt-based metal organic framework template with etching and selenization reaction, which has both a larger specific surface area and outstanding electrical conductivity. As the catalyst for oxygen evolution reaction, the porous CoSe achieves a lower onset potential of 1.48 V versus the reversible hydrogen electrode (RHE) and a small potential of 1.52 V (vs RHE) at an anodic current density of 10 mA cm. Especially, the linear sweep voltammogram curve of the porous CoSe is in consist with the initial curve after durability test for 24 h. When tested as an electrode for supercapacitor, it can deliver a specific capacitance of 713.9 F g at current density of 1 mA cm and exhibit excellent cycling stability in that a capacitance retention of 92.4% can be maintained after 5000 charge-discharge cycles at 5 mA cm. Our work presents a novel strategy for construction of electrochemical electrode.
多孔 CoSe 负载于碳布上，是通过刻蚀和硒化反应，以钴基金属有机骨架为模板制备的，它具有更大的比表面积和出色的导电性。作为析氧反应的催化剂，多孔 CoSe 具有更低的起始电位（相对于可逆氢电极（RHE）为 1.48 V）和更小的电位（相对于 RHE 为 1.52 V），在 10 mA cm 的阳极电流密度下。特别是，多孔 CoSe 的线性扫描伏安曲线与经过 24 小时耐久性测试后的初始曲线一致。当用作超级电容器的电极时，它可以在电流密度为 1 mA cm 时提供 713.9 F g 的比电容，并在 5 mA cm 时经过 5000 次充放电循环后保持 92.4%的电容保持率，表现出优异的循环稳定性。我们的工作为电化学电极的构建提供了一种新策略。
