期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 48, 期 84, 页码 32686-32698出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2023.05.067
关键词
Hydrogen evolution reaction; Electrocatalyst; Low-loading metalbased tungsten; oxide; Alkaline seawater electrolytes; Rhodium
This study investigates the use of low-loading metal-based tungsten oxide (WO3) as electrocatalysts for hydrogen evolution reaction (HER) in acid, alkaline, and alkaline-seawater electrolytes. Rhodium (Rh)-WO3 exhibits high HER activity in alkaline-seawater electrolyte and can be used as a cathode along with commercial ruthenium oxide (RuO2) as an anode for overall water splitting with excellent efficiency and stability.
One potential strategy to develop hydrogen evolution electrocatalysts for producing sustainable hydrogen in water electrolysis is creating electrocatalysts with low-cost, high activity, and high stability. Herein, we show that low-loading metal-based tungsten oxide (WO3) can be used as electrocatalysts for the hydrogen evolution reaction (HER) in acid, alkaline, and alkaline-seawater electrolytes. Among prepared electrocatalysts, rhodium (Rh)-WO3 exhibits a high HER activity with the values of overpotential of 48,116, and 98 mV to obtain a current density of 10 mA cm-2 in acid, alkaline, and alkaline-seawater electrolytes, respectively. In addition, the Rh-WO3 electrocatalyst shows high stability during the HER operation for over 60,000 s. Besides, the application of Rh-WO3 electrocatalyst as cathode and commercial ruthenium oxide (RuO2) as an anode for overall water splitting show excellent efficiency with only a potential of 1.45 V to a current density of 10 mA cm-2 in the alkaline-seawater electrolyte. The Rh-WO3//RuO2 cell also exhibits high stability for over 80,000 s and maintains a current of 15 mA cm2 at a cell voltage of 1.51 V. The results provide evidence that Rh-WO3 can be a promising HER catalyst for sustainable hydrogen production via alkaline-seawater electrolysis application.(c) 2023 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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