Highly stable lamellar array composed of CoSe2 nanoparticles for supercapacitors

ZIF-67-derived Se-doped CoSe2 grown on carbon nanofibers as oxygen electrocatalysts for rechargeable Zn–air batteries

“…The formation of the Se-O bonding may be due to the mixing of a small amount of oxygen into a nitrogen atmosphere, followed by the oxidation of a small amount of Se on the surface to SeO 2 after the selenization process. 49 The N 1s spectrum is resolved into three peaks in Se-CoSe 2 /CNFs-12 and CoO x /CNFs (Fig. 5(d)), including pyrrolic-N, graphitic-N and pyridinic-N.…”

“…12,13 Among the various NPGM-based electrocatalysts, cobalt diselenide (CoSe 2 ) has gained increasing attention as the most promising substitute for Ru/Pt-based electrocatalysts owing to its advantage of low cost, abundant reserves, and high chemical stability. [14][15][16][17] According to molecular orbital theory, the electron configuration of CoSe 2 (t 5 2g e 2 g ) is close to optimal filling, which has the advantage of promoting proton transfer and is an ideal electrical conductor. [18][19][20][21][22] However, due to sluggish kinetics and poor electrical conductivity, CoSe 2 particles are easy to agglomerate during the reaction, and other disadvantages greatly limit their application in electrochemical reactions.…”