Ni3N/NF as Bifunctional Catalysts for Both Hydrogen Generation and Urea Decomposition.
Shengnan HuChuanqi FengShiquan WangJianwen LiuHuimin WuLei ZhangJiujun ZhangPublished in: ACS applied materials & interfaces (2019)
Oxygen evolution reaction (OER) has a high overpotential, which can significantly reduce the energy efficiency in water decomposition. Using urea oxidation reaction (UOR) to replace OER has been a feasible and energy-saving approach because of its lower electrode potential. Furthermore, UOR is also an important process in wastewater treatment. This paper successfully synthesizes a high-performance bifunctional catalyst for urea electrolysis. The catalyst is nickel nitride bead-like nanospheres array supported on Ni foam (Ni3N/NF). Several characterization methods are used to analyze the catalyst's morphology, structure, and composition as well as catalytic activity/stability, including X-ray diffraction, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and electrochemical methods (cyclic voltammetry, linear sweep voltammetry, electrochemical impedance spectroscopy, and CAM). A concurrent two-electrode electrolyzer (Ni3N/NF∥Ni3N/NF) is constructed and used to validate the catalyst performance, and the results show that the cell achieves 100 mA·cm-2 at 1.42 V, while the cell voltage of Pt/C∥IrO2 is 1.60 V, indicating that the Ni3N/NF catalyst is superior to precious metals.
Keyphrases
- metal organic framework
- electron microscopy
- wastewater treatment
- signaling pathway
- lps induced
- highly efficient
- ionic liquid
- high resolution
- reduced graphene oxide
- pi k akt
- nuclear factor
- oxidative stress
- visible light
- gold nanoparticles
- room temperature
- single cell
- inflammatory response
- transition metal
- single molecule
- antibiotic resistance genes
- cell therapy
- solid state
- toll like receptor
- electron transfer
- stem cells
- label free
- magnetic resonance
- magnetic resonance imaging
- quantum dots
- human health
- risk assessment
- mesenchymal stem cells