Synergistic catalytic effect of N-doped carbon embedded with CoFe-rich CoFe2O4 clusters as highly efficient catalyst towards oxygen reduction

FexCo3−xO4 Nanohybrids Anchored on a Carbon Matrix for High‐Performance Oxygen Electrocatalysis in Alkaline Media

“…The existence of Fe 3+ is confirmed from the peak at 710.6 eV. Two shake‐up satellite peaks are also found at 716.1 and 732.4 eV [31,37] . The O 1s spectrum can be de‐convoluted in to three distinct components (Figure 3b) denoted as O1, O2 and O3, respectively.…”

“…nanostructured mixed valence oxide catalysts attracted tremendous attention in scientific and technological fields [23–30] . The first row (3d) transition metal‐based mixed metal oxides and spinel with better performance than Pt/C have been developed for bi‐functional ORR and OER, since mixed metal oxides are stable in alkaline medium [31] . Moreover, prominent experimental results have been demonstrated when carbon‐based materials of high conductivity are used as supports [32–36] .…”

“…designed tuneable valence composition nanocubes of CoFe‐oxides for water splitting electrocatalysis [37,38] . Recently, the synthesis of N‐doped CoFe‐rich CoFe 2 O 4 ORR EC is reported by a simple and efficient method by Qian et al [31] . In addition, Indra et al.…”

“…[23][24][25][26][27][28][29][30] The first row (3d) transition metal-based mixed metal oxides and spinel with better performance than Pt/C have been developed for bi-functional ORR and OER, since mixed metal oxides are stable in alkaline medium. [31] Moreover, prominent experimental results have been demonstrated when carbon-based materials of high conductivity are used as supports. [32][33][34][35][36] Among various transition metal oxides, particularly of Co or Fe supported on carbon materials are found to be highly ORR active.…”

“…For example, Lalwani et al described the preparation of sulphur incorporated iron cobalt oxides as an OER EC whereas Guo et al designed tuneable valence composition nanocubes of CoFeoxides for water splitting electrocatalysis. [37,38] Recently, the synthesis of N-doped CoFe-rich CoFe 2 O 4 ORR EC is reported by a simple and efficient method by Qian et al [31] In addition, Indra et al presented a solvothermal route for the synthesis of cobalt iron oxides and utilized these materials as a bi-functional EC for ORR and OER. [39] The iron cobalt oxides supported on carbon increased a lot of consideration seeing their superior electrical properties.…”