TY - JOUR
T1 - Low content of Fe3C anchored on Fe,N,S-codoped graphene-like carbon as bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions
AU - Li, Zeyu
AU - Gao, Qiuming
AU - Liang, Xiao
AU - Zhang, Hang
AU - Xiao, Hong
AU - Xu, Peng
AU - Liu, Zhengping
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/9
Y1 - 2019/9
N2 - A novel kind of non-precious metal Fe3C@Fe,N,S-GCM nanocomposite with very low metal content is obtained by a simple one-pot pyrolysis method using abundent, low cost and environmental friendly resouces. In the Fe3C@Fe,N,S-GCM nanocomposite, the Fe3C nanoparticles are uniformly anchored on the Fe,N,S-codoped graphene-like carbonaceous matrix. Synergetic multiple electrocatalytic active sites of Fe3C, Fe-Nx and N,S-co-doped carbon are identified for Fe3C@Fe,N,S-GCM. The Fe3C@Fe,N,S-GCM nanocomposite also possesses the high BET surface area and meso/macropore volume from the hierarchical porous superstructure, which may benefit the storing and transport of electrolyte ions. Attributed to the rational content and microstructure, the Fe3C@Fe,N,S-GCM presents a high bifunctional electrocatalytic activity for both oxygen reduction reaction (ORR)and oxygen evolution reaction (OER)with the ΔE (= EOER - EORR)of only 0.750 V. The bifunctional electrocatalytic activity is not only better than the commercial precious metal couples of RuO2 (OER)and Pt/C (ORR), but also represents the superiority among the non-precious metal ferrous bifunctional electrocatalysts.
AB - A novel kind of non-precious metal Fe3C@Fe,N,S-GCM nanocomposite with very low metal content is obtained by a simple one-pot pyrolysis method using abundent, low cost and environmental friendly resouces. In the Fe3C@Fe,N,S-GCM nanocomposite, the Fe3C nanoparticles are uniformly anchored on the Fe,N,S-codoped graphene-like carbonaceous matrix. Synergetic multiple electrocatalytic active sites of Fe3C, Fe-Nx and N,S-co-doped carbon are identified for Fe3C@Fe,N,S-GCM. The Fe3C@Fe,N,S-GCM nanocomposite also possesses the high BET surface area and meso/macropore volume from the hierarchical porous superstructure, which may benefit the storing and transport of electrolyte ions. Attributed to the rational content and microstructure, the Fe3C@Fe,N,S-GCM presents a high bifunctional electrocatalytic activity for both oxygen reduction reaction (ORR)and oxygen evolution reaction (OER)with the ΔE (= EOER - EORR)of only 0.750 V. The bifunctional electrocatalytic activity is not only better than the commercial precious metal couples of RuO2 (OER)and Pt/C (ORR), but also represents the superiority among the non-precious metal ferrous bifunctional electrocatalysts.
KW - Bifunctional electrocatalytic activity
KW - Doped graphene-like carbon
KW - Iron carbide nanoparticles
KW - Non-precious metal nanocomposite
KW - One-pot pyrolysis method
UR - https://www.scopus.com/pages/publications/85065841076
U2 - 10.1016/j.carbon.2019.05.012
DO - 10.1016/j.carbon.2019.05.012
M3 - 文章
AN - SCOPUS:85065841076
SN - 0008-6223
VL - 150
SP - 93
EP - 100
JO - Carbon
JF - Carbon
ER -