An old workhorse of oxide investigations: new features of Co3O4

Electrochemical behaviour of Fe x Co3−x O4 with (x = 0, 1, 2 and 3) oxides thin film electrodes in alkaline medium

“…Thermodynamic redox potentials corresponding to Co 3 O 4 /CoOOH or Co(OH) 2 /CoOOH and CoOOH/CoO 4 are *0.100 and *0.420 V vs. SCE that compare well with the experimental peak potentials [13,[17][18][19]. Peak C 0 2 could be associated with the reduction of cobalt species in an oxidation state higher than ?2, probably a hydrated cobalt oxide, which is difficult to reduce.…”

Fabrication of porous nanosheet-based Co 3 O 4 hollow nanocubes for electrochemical capacitors with high rate capability

“…The shapes of the CV curves clearly confirm the pseudocapacitive behavior from Co 3 O 4 . There are two distinct pairs of redox peaks at a scan rate of 5 mV s -1 , which indicates that the energy storage mechanisms of Co 3 O 4 mainly originate from the reversible faradaic redox reactions related to Co 2+ /Co 3+ and Co 3+ /Co 4+ , respectively [38,39]. Moreover, the current densities and the positions of the redox peak progressively shift with increasing scan rate, which can be explained by the diffusion of OH -ions into the Co 3 O 4 hollow structures.…”

Electrochemical detection of trace amount of arsenic(III) at glassy carbon electrode modified with cobalt oxide nanoparticles

“…Cobalt oxide nanoparticles are known to be highly reactive and they have been employed in processes such as energy storage system [33], electrochromic thin films [34] magnetoresistive devices [35] and heterogeneous catalysis [36]. Furthermore, Co 3 O 4 and other cobalt-based oxides continue to attract considerable interest, mainly due to their excellent electrocatalytic activity toward various compounds, ozone and oxygen evolution [37,38]. The electrocatalytic property of the cobalt oxide film is very much depends on the deposition method.…”