This is fun
C - carbon
O - oxygen
Co - cobalt
V - vanadium
Fe - iron
The Role of Composition of Uniform and Highly Dispersed Cobalt Vanadium Iron Spinel Nanocrystals for Oxygen Electrocatalysis
https://pubs.acs.org/doi/10.1021/acscatal.7b03529
https://wikidiff.com/vanadium/iron
The Pathopharmacological Interplay between Vanadium and Iron in Parkinson's Disease Models
https://pubmed.ncbi.nlm.nih.gov/32937783/
The effect of oxygen on physical and mechanicalproperties of vanadium
https://lib.dr.iastate.edu/cgi/viewcontent.cgi?article=3453&context=rtd
The vanadium-oxygen system
https://www.sciencedirect.com/science/article/abs/pii/0022508865900524
Vanadium One Iron Corp.
https://www.vanadiumone.com/