Thermoelectrochemical formation of Fe/Fe3C@hollow N-doped carbon in molten salts for enhanced catalysis

被引:50
作者
Weng, Wei [1 ,3 ]
Zhou, Jing [2 ]
Gu, Dong [2 ]
Xiao, Wei [1 ]
机构
[1] Wuhan Univ, Coll Chem & Mol Sci, Hubei Key Lab Electrochem Power Sources, Wuhan 430072, Peoples R China
[2] Wuhan Univ, Inst Adv Studies, Wuhan 430072, Peoples R China
[3] Wuhan Univ, Sch Resource & Environm Sci, Hubei Int Sci & Technol Cooperat Base Sustainable, Wuhan 430072, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金; 国家重点研发计划;
关键词
OXYGEN REDUCTION REACTION; POROUS FE; EVOLUTION; IRON; GRAPHENE; NANOPARTICLES; ELECTROCATALYSTS; NANOSHEETS; NANOTUBES; LAYERS;
D O I
10.1039/d0ta00565g
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The interaction between iron and non-metals is a classic topic in industrial iron/steel making and catalysis, in which the modulation of the linkage and distribution of iron and non-metals is a key factor to develop advanced Fe-based materials. Herein, a hybrid of Fe/Fe3C nanoparticles strongly encapsulated in a nitrogen-doped carbon (N-C) hollow shell is prepared through the thermoelectrochemical treatment of Fe2O3@polydopamine (Fe2O3@PDA) in molten NaCl-CaCl2 at 600 degrees C. The coupling of the thermal pyrolysis of PDA and electrochemical reduction of Fe2O3 contributes to generating Fe/Fe3C species at a relatively low temperature, ensuring structural integrity and in situ N doping for the hybrid to achieve a well-defined hollow structure and abundant active sites of Fe-N and C-N species. The hollow carbon skeleton guarantees efficient mass transfer and maximum exposure of active sites. Consequently, Fe/Fe3C@N-C exhibits appealing activity for electrocatalytic hydrogen evolution and Fenton-like reaction and importantly, it can be readily separated for reuse by a magnetic field.
引用
收藏
页码:4800 / 4806
页数:7
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