Modulated FeCo nanoparticle in situ growth on the carbon matrix for high-performance oxygen catalysts

Three-dimensional nano-framework CoP/Co2P/Co3O4 heterojunction as a trifunctional electrocatalyst for metal–air battery and water splitting

“…6 Among the various candidates, cobalt-based catalysts attract particular attention due to their low cost, abundant resources and great potential for multiple catalytic reactions due to their multivalent nature and structural diversity. [7][8][9][10] Various strategies such as nanostructure design, doping engineering and integrating with conductive substrate, have been commonly employed to increase the abundant reaction sites on special surfaces, promote the intrinsic activity of the active site, lower the overpotential or facilitate charge transfer. Although some cobalt-based compounds can exhibit either one or two activities toward the ORR, OER or HER with high performance in alkaline solution, it remains challenging to achieve triple redox reactions (i.e., ORR, OER, and HER) on a single active site or on a single catalyst with a low overpotential.…”

FeCo/N-co-doped 3D carbon nanofibers as efficient bifunctional oxygen electrocatalyst for Zn–air batteries

“…As for FeCoNCF and FeCoNC, the XRD patterns displayed the (110), (200) and (211) crystalline planes of FeCo alloy (PDF#49-1568) corresponding to the sharp peaks at 44.9°, 65.3° and 82.7°, respectively. 44,45 This suggests that the PBA and BC composite was successfully synthesized.…”

“…Based on previous studies, it is suggested that this may be due to the downward shift of the d-band center, which optimizes the adsorption of oxygen containing intermediate species and enables FeCoNCF to have a better catalytic performance. 44,52,53 The N 1s spectrum shown in Fig. 2f exhibits peaks at 398.6 eV, 400.1 eV, 401.1 eV and 404.4 eV, corresponding to four types of N, pyridinic-N, pyrrolic-N, graphitic-N and oxidized-N, respectively.…”

Highly Disordered Fe-Doped CeO2 with Oxygen Vacancies Facilitates Electrocatalytic Water Oxidation

“…Electrochemical water splitting provides an efficient approach for the clean hydrogen fuel industry to address fossil fuel consumption and further reduce environmental pollution. − Considering the overall water splitting process, the oxygen evolution reaction (OER) is the bottleneck to limit the hydrogen production as a result of the large overpotential. , Noble-metal-based catalysts, such as ruthenium and iridium oxides, have been widely reported as highly efficient OER catalysts. − However, their practical application and commercialization are restricted by their high cost and scarcity. Therefore, considerable efforts have been made to explore earth-abundant electrocatalysts for the OER with a small overpotential, low price, and high stability. − …”