期刊
SUSTAINABLE ENERGY & FUELS
卷 6, 期 2, 页码 474-483出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1se01478a
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资金
- Human Resources Development Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Korean Government Ministry of Trade, Industry and Energy [20194030202470]
- Technology Development Program to Solve Climate Changes of the National Research Foundation - Ministry of Science and ICT [2016M1A2A2936784]
Urea electrolysis is an energy-saving and efficient method for hydrogen production, which plays an important role in the production of renewable energy.
A clean and sustainable hydrogen-based economy will usher in a new era. Therefore, the hydrogen production pathway is crucial. The urea (CO(NH2)(2)) electrolysis has recently been investigated as a promising energy-saving approach for renewable hydrogen production compared to conventional water (H2O) electrolysis. This is because of the minimal cell voltage, mitigation of urea-rich wastewater, and availability of electrocatalysts. Herein, we report trimetallic nickel-cobalt-iron layered triple hydroxide nanosheets (NiCoFe-LTH) grown on nickel foam (NF) via a one-step hydrothermal synthesis method. They were tested as catalysts for the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER) in direct urea fuel cells (DUFCs). NiCoFe-LTH/NF behaves as a highly active durable 2D catalyst electrode for the UOR and HER with the required potentials of 1.337 V and 180 mV to achieve catalytic current densities of 25 and 10 mA cm(-2) respectively, in 1 M KOH with 0.33 M urea. Moreover, this electrode also performs well in urea-electrolysis, requiring a very small potential of 1.49 V to achieve 10 mA cm(-2) over a period of 30 h. The developed urea electrolyzer is very effective at producing H-2. It is cost-effective and involves no difficulties in material synthesis or electrolyzer fabrication, paving the way for the development of clean renewable energy infrastructure.
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