Cu-assisted induced atomic-level bivalent Fe confined on N-doped carbon concave dodecahedrons for acid oxygen reduction electrocatalysis

Cu/Fe embedded N-doped carbon as a highly durable oxygen reduction electrocatalyst

“…A broad shoulder peak between 20° and 30° having a preferred orientation along the (002) planes confirmed the presence of low graphitic carbon. 44,45 Moreover, the higher degree of graphitization in the Cu : Fe doped compositions of HNC shows the formation of graphitic carbon due to Cu/Fe dual-atoms. It is worth noting that there are no noticeable Bragg peaks for metallic Cu and Fe in the XRD patterns of all the synthesized samples because of the low metal loading.…”

Fe‐ZIF8 Coating Cu Foil Derived Carbon as A pH‐Universal Electrocatalyst for Efficient Oxygen Reduction Reaction

“…Furthermore, doping Fe−N−C with the second metal species, especially copper, has also been investigated recently to improve ORR activity of Fe−N−C materials [14] . However, to further introduce of Cu into the Fe‐ZIF8 easily leads to the coordination competition among Zn 2+ , Fe 2+ /Fe 3+ and Cu 2+ during the nucleation and crystallization of MOF, tending to cause irregular distortion of ZIF structure [14c,15] . To avoid the disadvantages of liquid phase synthesis method, recently, a few papers report the strategy that thermally induces migrating of manganese, iron, cobalt, nickel and copper atom from the corresponding metal plates or metallic compounds at high temperature to in situ introduce the second metal doping [16] .…”