Yolk–Shell-Structured Cu/Fe@γ-Fe2O3 Nanoparticles Loaded Graphitic Porous Carbon for the Oxygen Reduction Reaction
MetadataShow full item record
Core–shell Cu/γ-Fe2O3@C and yolk–shell-structured Cu/Fe@γ-Fe2O3@C particles are prepared by a facile synthesis method using copper oxide as template particles, resorcinol-formaldehyde as the carbon precursor, and iron nitrate solution as the iron source via pyrolysis. With increasing carbonization temperature and time, solid γ-Fe2O3 cores are formed and then transformed into Fe@γ-Fe2O3 yolk–shell-structured particles via Ostwald ripening under nitrogen gas flow. The composition variations are studied, and the formation mechanism is proposed for the generation of the hollow and yolk–shell-structured metal and metal oxides. Moreover, highly graphitic carbons can be obtained by etching the metal and metal oxide nanoparticles through an acid treatment. The electrocatalytic activity for oxygen reduction reaction is investigated on Cu/γ-Fe2O3@C, Cu/Fe@γ-Fe2O3@C, and graphitic carbons, indicating comparable or even superior performance to other Fe-based nanocatalysts.
Showing items related by title, author, creator and subject.
Facile fabrication of core-shell structured Ag@carbon and mesoporous yolk-shell structured Ag@carbon@silica by an extended Stöber methodYang, T.; Liu, Jian; Zheng, Y.; Monteiro, M.; Qiao, S. (2013)Layer upon layer: A facile extended Stöber method has been developed for the synthesis of diverse metal–carbon spheres, which includes core–shell-structured Ag@carbon, rattle-type Ag,AgBr@meso-SiO2, and yolk–shell-structured ...
Hierarchical mesoporous yolk-shell structured carbonaceous nanospheres for high performance electrochemical capacitive energy storageYang, T.; Zhou, R.; Wang, D.; Jiang, San Ping; Yamauchi, Y.; Qiao, S.; Monteiro, M.; Liu, Jian (2015)Hierarchical mesoporous yolk–shell structured carbon nanospheres (YSCNs) with an ordered mesoporous carbon core and a microporous carbon shell show excellent electrochemical performance with a maximal specific capacitance ...
Graphene oxide/core-shell structured metal-organic framework nano-sandwiches and their derived cobalt/N-doped carbon nanosheets for oxygen reduction reactionsWei, J.; Hu, Y.; Liang, Y.; Kong, B.; Zheng, Z.; Zhang, J.; Jiang, San Ping; Zhao, Y.; Wang, H. (2017)A metal-organic framework (MOF) seed-mediated deposition route is developed to synthesize MOF/graphene oxide (GO)/MOF nano-sandwiches with core-shell structured MOF (i.e. ZIF-8@ZIF-67) crystals uniformly distributed on ...