Affiliation:
1. State Key Laboratory of Green Chemical Engineering and Industrial Catalysis Center for Computational Chemistry and Research Institute of Industrial Catalysis School of Chemistry and Molecular Engineering East China University of Science and Technology 130 Meilong Road Shanghai 200237 China
2. School of Chemistry and Chemical Engineering Shanghai Jiao Tong University 800 Dongchuan Road Shanghai 200240 China
Abstract
AbstractGreen hydrogen production through electrochemical overall water splitting has suffered from sluggish oxygen evolution reaction (OER) kinetics, inferior conversion efficiency, and high cost. Herein, ultrafine PtIr clusters are synthesized via an electrodeposition method and decorated on the Co3O4 nanoflowers assembled by nanowires (PtIr‐Co3O4). The encouraging performances in electrochemical OER and hydrogen evolution reaction (HER) are achieved over the PtIr‐Co3O4 catalyst, with the overpotentials as low as 410 and 237 mV at 100 mA cm−2, respectively, outperforming the commercial IrO2 and Pt/C catalysts. Due to the ultralow loading of PtIr clusters, the PtIr‐Co3O4 catalyst exhibits 1270 A gIr−1 for OER at the overpotential of 400 mV. Our detailed analyses also show that the strong interactions between the ultrafine PtIr clusters and the Co3O4 nanoflowers enable the PtIr‐Co3O4 catalyst to afford 10 mA cm−2 for the overall water splitting at the potential of 1.57 V, accompanied by high durability for 100 h.
Funder
National Key Research and Development Program of China
National Natural Science Foundation of China