Intrinsic Activity of Oxygen Evolution Catalysts Probed at Single CoFe2O4 Nanoparticles
J. Am. Chem. Soc.: RESOLV member Prof. Kristina Tschulik's study presents nano impact electrochemistry as an additive-free method to overcome challenges in identifying intrinsic electrocatalytic activity due to inculsion of additives and binders during characterization.
This work overcomes the drawbacks of conventional techniques that use binders and additives to precisely characterize the intrinsic electrocatalytic activity of nanomaterials for the oxygen evolution reaction (OER). It is demonstrated that even under severe OER circumstances, individual CoFe2O4 nanoparticles retain their size and crystal structure by applying nano-impact electrochemistry to them, resulting in current densities in the kA/m² range. According to the study, the diffusion of oxygen away from the particle surface limits the OER at these nanoparticles.
