Issue 15, 2021

High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation

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.

Graphical abstract: High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation

Supplementary files

Article information

Article type
Paper
Submitted
01 Jan 2021
Accepted
28 Mar 2021
First published
30 Mar 2021

J. Mater. Chem. A, 2021,9, 9753-9760

High-performance overall water splitting based on amorphous iron doped cobalt tungstate via facile co-precipitation

J. Wu, R. Xie, X. Hu, Z. Nie, Y. Shi, Y. Yu and N. Yang, J. Mater. Chem. A, 2021, 9, 9753 DOI: 10.1039/D1TA00001B

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