Exploring the Pyrolysis Mechanism towards OER Performance Optimization of Salophen-ligated Binuclear Cobalt Complex

Exploring pyrolysis process is an efficient way to study the relationship between molecular level of the precursor structure and electrocatalytic functional materials in practice.Here,the unique semi-enclosed sector structure of Salophen ligands with highly symmetric N,N,0,0 mode was introduced to construct binuclear Co complex[Co2(salophen)(CI)2(C2H3N)](compound 1),which provides pre-liminary theoretical basis for the efficient coreshell structure electrocatalysts obtained by pyrolysis regulation.Moreover,we adopted TG-MS to real-time track the pyrolysis process from precursors of binuclear Co complexes with Salophen ligand to efficient catalytic materials with core-shell nano structures.As expected,the 1-600 sample achieves ultra-low overpote ntial of 256 mV at 10 mA·cm^(-2) and high catalytic stability within 10 h in 1 mol/L KOH solution.This work highlights salophen-ligated complex as excellent precursor material system for the an alysis of pyrolysis evoluti on process,and provides an opport unity for targeted preparati on of efficie nt oxy-gen evoluti on reacti on(OER)nano catalysts.