1. Coupling of NiFe Layered Double Hydroxides with Sulfides for Highly Efficient Urea Electrolysis and Hydrogen Evolution.
- Author
-
Liu, Wenxian, Qin, Zhengguang, Dai, Xiaojing, Meng, Shibo, Niu, Xinxin, Shi, Wenhui, Wu, Fangfang, and Cao, Xiehong
- Subjects
- *
LAYERED double hydroxides , *ELECTROLYSIS , *UREA , *HYDROGEN evolution reactions , *SULFIDES , *HYDROXIDES - Abstract
Urea electrolysis is regarded as a prospective method for energy-saving hydrogen production. However, the practical application of this technology is limited by the lack of high-performance bifunctional catalysts for hydrogen evolution reaction (HER) and urea oxidation reaction (UOR). Herein, a heterostructure catalyst composed of NiFe layered double hydroxide (LDH) and sulfides (NiFe LDH-NiFeSx/NF) catalysts is prepared via a simple one-step hydrothermal approach. Remarkably, the prepared NiFe LDH-NiFeSx/NF required 138 mV and 1.34 V to achieve 10 mA cm−2 for HER and UOR in 1 M KOH and 0.33 M urea, respectively. Furthermore, when NiFe LDH-NiFeSx/NF is used as a cathode for urea electrolysis, only 1.44 V is required at 10 mA cm−2, which is much lower than the 1.53 V needed for overall water splitting. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF