Effcient and stable hydrogen evolution and antibiotic degradation in all-pH-scale water/alkaline seawater using Fe-Co phosphide hollow nanocages fabricated from metallurgical solid waste  

作　　者：Zekun Zhao Suqin Li Yongkui Li Qingqing Xia Haiping Lei Hao Zhang Shuqiang Jiao 

机构地区：[1]School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Bejing 100083,China [2]State Key Laboratory of Advanced Metalurgy,University of Science and Technology Bejing,Bejing 100083,China

出　　处：《Journal of Energy Chemistry》2025年第2期661-675,I0014,共16页能源化学(英文版)

基　　金：supported by the National Natural Science Foundation of China(51874039).

摘　　要：The utilization of seawater,a plentiful and cost-effective resource,instead of freshwater for H_(2)production through electrolysis has garnered significant attention.Herein,we present the synthesis of open-structured Fe-Co phosphide(FCP)nanocages for the overall seawater electrolysis,employing metallurgical solid waste(steel rolling sludge,SRS)as the precursor material.The FCP nanocages demonstrate exceptional catalytic activity for the hydrogen evolution reaction(HER)in all pH scales,achieving performance comparable to that of Pt/C catalysts at high current densities,The electrolyzer assembled with FCP‖FCP requires 1.57 and 1.68 V to achieve current densities of 10 and 100 mA cm^(-2),respectively.Furthermore,the assembled FCP electrolyzer showcases over 100 h of cycling stability and nearly 100%Faradaic efficiency.Crucially,it can be powered by commercially available silicon solar panels,operating under an intensity of 100 mW cm^(-2),and by wind-driven sources,rendering it highly promising for real-world applications,The seawater hydrogen evolution system coupled with levofloxacin(LEV)degradation was constructed for the first time.The oxidation potential of LEV oxidation reaction(LEVOR)was significantly lower than that of oxygen evolution reaction(OER),indicating that the LEV degradation reaction occurred preferentially and achieved a removal efficiency of 98.57%within 60 min.This study provides effective strategies for valorizing SRS and offers insights into the fabrication of highperformance catalysts.

关 键 词：Metallurgical solid waste Fe-Cophosphide nanocages All-pH-scale Synergistic catalysis High current density Levofloxacin 

分 类 号：O64[理学—物理化学]