Nickel phosphide on Ni foam as anode and peroxymonosulfate as the chemical oxidizer for effective direct urea fuel cell  

作　　者：Jingwei Hao Shen Zhao Ran Mao Xu Zhao 

机构地区：[1]Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Journal of Environmental Sciences》2021年第12期84-91,共8页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundations of China (Nos. 21777176, 51808535);the National Water Pollution Control and Treatment Science and Technology Major Project (No. 2018ZX074110-002);the Chinese Academy of Sciences (No. QYZDB-SSW-DQC018);。

摘　　要：The direct urea fuel cell(DUFC) is a low cost and competitive approach for contemporaneous urine or urea-contaminated wastewater treatment and electricity generation. However,the lack of efficient urea oxidation reaction(UOR) electrocatalysts and suitable electron acceptors remains a challenge for practical applications. Here, we developed a DUFC system using Ni2 P@Ni foam as the anode and peroxymonosulfate(PMS) as the chemical oxidizers.The Ni2 P@Ni foam anode showed a high oxidation activity for UOR with an onset potential of 0.30 V vs. Ag/Ag Cl and Tafel slope of 34.4 m V/dec. PMS with high theoretical potential improved the cell voltage to 1.43 V. A power density of DUFC up to 4.91 m W/cm2 was achieved using PMS at room temperature, which was approximately twice as high as using H2 O2(2.38 m W/cm2). NiII/NiⅢwas the redox active species on the Ni2 P anode in the DUFC process, and NiIIwas electrochemically oxidized to NiⅢ, which reverted to NiII by urea reduction. When real human urine was used as the fuel, a power density of 4.46 m W/cm2 can be achieved at room temperature. This DUFC with high cell performance showed potential application in urea wastewater treatment.

关 键 词：Direct urea fuel cell(DUFC) NI2P PEROXYMONOSULFATE Urine 

分 类 号：TM911.4[电气工程—电力电子与电力传动]