Electrochemical Deposition of a Metal–Organic Framework and Subsequent Conversion to Cobalt Selenide
Hyung‐Woo Jee, Ki‐Jung Paeng, Noseung Myung, Krishnan Rajeshwar
Abstract
Here, we prepared a cobalt–metal organic framework (MOF) by anodic electrodeposition at room temperature and transformed it first to Co3O4 by calcination. The MOF-derived Co3O4 was then employed as a sacrificial template to fabricate CoSe films via anion exchange with a NaHSe medium. Electrodeposited MOF films showed a uniform and well-defined dodecahedral morphology with a particle size in the 3–4 μm range. The MOF-derived Co3O4 retained the original dodecahedral morphology, and these morphological features were essentially preserved in CoSe derived from the Co3O4 template via anion exchange. Both the parent oxide and the chalcogenide were characterized by a variety of spectroscopic and microscopic methods. The MOF-derived CoSe was demonstrated as a nonenzymatic glucose sensor with an analytical sensitivity of 1423.9 μA mM–1 cm–2 and a lower detection limit of 1.53 μM.