Scalable Electrocatalytic Urea Wastewater Treatment Coupled with Hydrogen Production by Regulating Adsorption Behavior of Urea Molecule  

作　　者：Chunming Yang Huijuan Pang Xiang Li Xueyan Zheng Tingting Wei Xu Ma Qi Wang Chuantao Wang Danjun Wang Bin Xu 

机构地区：[1]Shaanxi Key Laboratory of Chemical Reaction Engineering,School of Chemistry and Chemical Engineering,Yan’an University,Yan’an 716000,People’s Republic of China [2]College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,People’s Republic of China [3]Hubei Three Gorges Laboratory,Yichang 443007,People’s Republic of China

出　　处：《Nano-Micro Letters》2025年第7期177-189,共13页纳微快报(英文版)

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.22162025,22168040);the Youth Innovation Team of Shaanxi Universities,the Open and Innovation Fund of Hubei Three Gorges Laboratory(SK232001);the Regional Innovation Capability Leading Program of Shaanxi(2022QFY07-03,2022QFY07-06).

摘　　要：Electrocatalytic urea wastewater treatment technology has emerged as a promising method for environmental remediation.However,the realization of highly efficient and scalable electrocatalytic urea wastewater treatment(SEUWT)is still an enormous challenge.Herein,through regulating the adsorption behavior of urea functional groups,the efficient SEUWT coupled hydrogen production is realized in anion exchange membrane water electrolyzer(AEMWE).Density functional theory calculations indicate that self-driven electron transfer at the heterogeneous interface(NiO/Co_(3)O_(4))can induce charge redistribution,resulting in electron-rich NiO and electron-deficient Co_(3)O_(4),which are superior to adsorbing C=O(electron-withdrawing group)and–NH_(2)(electron-donating group),respectively,regulating the adsorption behavior of urea molecule and accelerating the reaction kinetics of urea oxidation.This viewpoint is further verified by temperature-programmed desorption experiments.The SEUWT coupled hydrogen production in AEMWE assembled with NiO/Co_(3)O_(4)(anode)and NiCoP(cathode)can continuously treat urea wastewater at an initial current density of 600 mA cm^(-2),with the average urea treatment efficiency about 53%.Compared with overall water splitting,the H_(2) production rate(8.33 mmol s^(-1))increases by approximately 3.5 times.This work provides a cost-effective strategy for scalable purifying urea-rich wastewater and energy-saving hydrogen production.

关 键 词：Urea wastewater treatment Hydrogen production Adsorption behavior Heterogeneous interface 

分 类 号：O646[理学—物理化学]