Yin Xianzhi, Zhu Kai, Ye Ke, Yan Jun, Cao Dianxue, Zhang Dongming, Yao Jiaxin, Wang Guiling
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, PR China.
Shanxi Province Key Laboratory of Higee-Oriented Chemical Engineering, North University of China, Taiyuan 030051, PR China.
J Colloid Interface Sci. 2024 Jan 15;654(Pt A):36-45. doi: 10.1016/j.jcis.2023.10.011. Epub 2023 Oct 4.
The direct urea fuel cell (DUFC) is a power generation equipment with urea-rich wastewater or urine as fuel source. It has the unique ability to purify sewage while simultaneously generating electricity, making it a highly efficient and environmentally friendly option. In this paper, pomegranate seed-like Ni nano-blocks and Fe nanosheets were synthesized by electrodeposition and chemical reduction and attached to the carbonized melamine sponge matrix. The N-doped carbon sponge (NCS) provided a large number of polyhedral holes, which allowed for efficient gas escape through channels. The combination of Fe reduces the initial urea oxidation potential, reaction activation energy and reaction resistance. The synthesized FeNi supported on N-doped carbon sponge composite (FeNi@NCS) has a catalytic current density of 625 mA cm and a Tafel slope of 42.51 mV dec for urea electrooxidation reaction (UOR). Assembling the direct urine-hydrogen peroxide fuel cell (DUrHPFC) resulted in the highest performance output. The open circuit voltage (OCV) was 0.98 V, and the peak power density reached 9.61 mW cm. The results show that the prepared catalyst provides an opportunity to solve the problems that hinder the development of urea green cycle at present.
直接尿素燃料电池（DUFC）是一种以富含尿素的废水或尿液为燃料源的发电设备。它具有在净化污水的同时发电的独特能力，使其成为一种高效且环保的选择。本文通过电沉积和化学还原合成了石榴籽状的镍纳米块和铁纳米片，并将其附着在碳化三聚氰胺海绵基质上。氮掺杂碳海绵（NCS）提供了大量的多面体孔，允许气体通过通道有效逸出。铁的加入降低了初始尿素氧化电位、反应活化能和反应电阻。合成的负载在氮掺杂碳海绵复合材料（FeNi@NCS）上的铁镍对尿素电氧化反应（UOR）的催化电流密度为625 mA cm，塔菲尔斜率为42.51 mV dec。组装直接尿液-过氧化氢燃料电池（DUrHPFC）可实现最高性能输出。开路电压（OCV）为0.98 V，峰值功率密度达到9.61 mW cm。结果表明，所制备的催化剂为解决目前阻碍尿素绿色循环发展的问题提供了契机。
