Role of rhodium doping into lanthanum cobalt oxide (LaCoO3) perovskite and the induced bifunctional activity of oxygen evolution and reduction reactions in alkaline medium

Rhodium doping into the lanthanum cobalt oxide (LaCo1-xRhxO3) has induced significant bifunctional electrochemical activity towards the OER and ORR in alkaline solution with a substantially lower OER/ORR onset potential of 1.36/0.73 V vs HRE, smaller Tafel slope (116/90 mV/dec), low charge-transfer resistance, and an OER and ORR potential gap of only 0.65 V.