Dandelion-like P-Doped Fe-Co-Se Grown on Carbon Cloths for Enhanced Electrocatalytic Oxygen Evolution

As a representative anodic reaction, the oxygen evolution reaction (OER) is often combined with hydrogen evolution, carbon dioxide reduction, and other cathodic reactions. Bimetallic selenides can satisfy the requirement of efficiency and economy for OER. However, the OER performance of Fe-Co-Se is less than satisfactory, restricted by the limited inherent active sites. Therefore, by doping P into Fe-Co-Se, the electron density and mass transfer were successfully adjusted. The 3D dandelion-like flower Fe-Co-Se-P/CC showed ?(10) of 210 mV and the 45.3 mV dec(-1) Tafel slope better than Fe-Co-Se/CC and RuO2. Experimental investigations demonstrated that outstanding OER activity was ascribed to the double modulation influences of P dopant both in electron environment and morphology which could not only improve conductivity but also enrich catalytic reactive sites. This work presents another choice for the design of a transition metal OER catalyzer and propels the development of electrocatalytic oxygen production to higher efficiency and lower cost.

Automated summary

By doping phosphorus into Fe-Co-Se, the electron density and mass transfer were successfully adjusted, leading to improved oxygen evolution reaction (OER) performance. This research provides another option for the design of transition metal OER catalysts and promotes the development of electrocatalytic oxygen production with higher efficiency and lower cost.