Zhang Longtao, Zhang Mingliang, Zhang Yu, Zhuo Wei, Chen Tong, Fang Yilin, Hong Jiaxiang, Wei Hehe, Gong Xue-Qing
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.
School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, China.
Chemistry. 2024 Jun 3;30(31):e202400329. doi: 10.1002/chem.202400329. Epub 2024 May 6.
Green 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 CoO nanoflowers assembled by nanowires (PtIr-CoO). The encouraging performances in electrochemical OER and hydrogen evolution reaction (HER) are achieved over the PtIr-CoO catalyst, with the overpotentials as low as 410 and 237 mV at 100 mA cm, respectively, outperforming the commercial IrO and Pt/C catalysts. Due to the ultralow loading of PtIr clusters, the PtIr-CoO catalyst exhibits 1270 A g for OER at the overpotential of 400 mV. Our detailed analyses also show that the strong interactions between the ultrafine PtIr clusters and the CoO nanoflowers enable the PtIr-CoO catalyst to afford 10 mA cm for the overall water splitting at the potential of 1.57 V, accompanied by high durability for 100 h.
