Xu Qinglian, Yu Tianqi, Chen Jinli, Qian Guangfu, Song Hainong, Luo Lin, Chen Yongli, Liu Tengyu, Wang Yizhe, Yin Shibin
College of Chemistry and Chemical Engineering, School of Physical Science and Technology, State Key Laboratory of Processing for Non-Ferrous Metal and Featured Materials, Guangxi University, 100 Daxue Road, Nanning, 530004, China.
Guangxi Bossco Environmental Protection Technology Co., Ltd., 12 Kexing Road, Nanning 530007, China.
ACS Appl Mater Interfaces. 2021 Apr 14;13(14):16355-16363. doi: 10.1021/acsami.1c01188. Epub 2021 Apr 2.
Urea electrolysis has prospects for urea-containing wastewater purification and hydrogen (H) production, but the shortage of cost-effective catalysts restricts its development. In this work, the tomentum-like FeNi-MoO heterojunction nanosheets array self-supported on nickel foam (NF) as bifunctional catalyst is prepared by facile hydrothermal and annealing method. Only 1.29 V and -50.8 mV is required to obtain ±10 mA cm for urea oxidation and hydrogen evolution reaction (UOR and HER), respectively, showing great bifunctional catalytic activity. For overall urea electrolysis, it only needs 1.37 V to reach 10 mA cm and can last at 100 mA cm for 70 h without obvious activity attenuation, showing outstanding durability. Coupling interface constructions of FeNi-MoO heterostructures, novel morphology with a mesoporous and self-supporting structure could be the reason for this good performance. This work thus proposes a promising catalyst for boosting UOR and HER to realize efficient overall urea electrolysis.
尿素电解在含尿素废水净化和制氢方面具有前景，但缺乏具有成本效益的催化剂限制了其发展。在本工作中，通过简便的水热和退火方法制备了自支撑在泡沫镍（NF）上的绒毛状FeNi-MoO异质结纳米片阵列作为双功能催化剂。尿素氧化反应（UOR）和析氢反应（HER）分别仅需1.29 V和 -50.8 mV即可达到±10 mA cm²，显示出优异的双功能催化活性。对于整体尿素电解，仅需1.37 V即可达到10 mA cm²，并且可以在100 mA cm²下持续70 h而无明显活性衰减，显示出出色的耐久性。FeNi-MoO异质结构的耦合界面结构、具有介孔和自支撑结构的新颖形貌可能是这种良好性能的原因。因此，这项工作提出了一种有前景的催化剂，用于促进UOR和HER以实现高效的整体尿素电解。
