Doping CeO2/Ce(OH)CO3/CF nanohybrids with Gd for structural tuning and oxygen evolution reaction performance enhancing

Cerium-based compounds hold great promise for applications in the field of catalysis and energy due to their synergetic electrochemical performance. Herein, a novel two-dimensional (2D) Gd decorated CeO2/Ce(OH)CO3 nanohybrid has been prepared by a one-step hydrothermal method and pioneered as an efficient and stable electrocatalyst for OER. Interestingly, the content of Ce(OH)CO3, morphology, and oxygen vacancies of CeO2/Ce (OH)CO3 nanohybrids can be controlled by changing the amount of Gd doping. Among them, the 2% Gd-doped CeO2/Ce(OH)CO3 nanosheet demonstrates dramatically enhanced oxygen evolution reaction (OER) performances with a low overpotential of 292 mV at 10 mA cm-2 and possesses excellent stability over 40 h, outperforming some recently reported Ceria-based OER catalysts. Our findings provide a possible way to develop new electrocatalysts with excellent OER abilities for energy conversion applications.