High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation. Issue 15 (6th April 2021)

• Record Type: Journal Article
• Authors: Wu, Jin; Xie, Renjie; Hu, Xiangchen; Nie, Zhiwei; Shi, Yanuo; Yu, Yi; Yang, Nan
• Is Part Of: Journal of materials chemistry. Volume 9:Issue 15(2021)
• Page Start: 9753
• Page End: 9760
• Publication Date: 2021-04-06
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/d1ta00001b
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The as-prepared amorphous Fe-doped CoWO4 bifunctional electrocatalyst shows a low overpotential of 259 and 118 mV to reach a current density of 10 mA cm −2 for the OER and HER in 1 M KOH, respectively. Abstract : Exploring high-performance and low-cost bifunctional electrocatalysts is crucial for developing highly efficient overall water splitting cells. In this work, a facile and cheap co-precipitation method, which is compatible with large-scale production, is applied to prepare amorphous Fe-doped CoWO4 bifunctional electrocatalysts. Low overpotentials of 259 and 118 mV to reach a current density of 10 mA cm −2 for the OER and HER in 1 M KOH are found, respectively. Moreover, no detectable potential decay is observed at 50 mA cm −2 for at least 15 h, revealing its excellent long-term stability. Finally, a highly efficient overall water splitting cell is assembled with amorphous Fe-doped CoWO4 as a bifunctional electrocatalyst. A low cell voltage of 1.55 V is required to achieve a current density of 10 mA cm −2, which surpasses the benchmark IrO2 ‖Pt/C cell.