Synthesis of Co/CeO₂ hetero-particles with abundant oxygen-vacancies supported by carbon aerogels for ORR and OER

Abstract

It is highly significant for the fabrication of rechargeable metal-air battery to develop cost-efficient and high-performance electrocatalysts of bifunctionality for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR)....

Simultaneous optimization of CoIr alloy nanoparticles and 2D graphitic-N doped carbon support in CoIr@CN by Ir doping for enhanced oxygen and hydrogen evolution reactions

“…Compared with micropores, mesopores would be more capable of increasing the mass transport of reaction intermediates and exposing the active sites to promote electrochemical reaction kinetics. 31,33…”

“…Compared with micropores, mesopores would be more capable of increasing the mass transport of reaction intermediates and exposing the active sites to promote electrochemical reaction kinetics. 31,33 X-ray diffraction (XRD) characterization was employed to investigate the crystalline structures of catalysts. The XRD patterns of 2D MOF match with the ZIF-9(III) patterns mentioned in previous reports (Fig.…”

Design of advanced aerogel structures for oxygen reduction reaction electrocatalysis

“…Co–CeO 2 and CeO 2 –Fe 2 O 3 bimetallic NPs demonstrated enhanced catalytic activity when compared to the single‐metal‐based NPs. This improvement was attributed to the rich oxygen vacancies in the rare metal oxides (CeO 2 ) that can promote the chemisorption and activation of O 2 55,56 . Different studies have been focusing on well‐dispersed PGM‐Free bimetallic NPs, 54,57 for example, CoFe NPs on CA.…”

Boosting the oxygen evolution reaction performance through defect and lattice distortion engineering

“…However, their low earth abundance and high cost have obvious disadvantages for their large-scale application in water splitting. In the past, great progress has been made to synthesize highly efficient, durable, and cost-effective OER catalysts based on transition non-noble metal compounds, such as transition-metal oxides, 3 phosphides, 4 nitrides, 5 selenides, 6 and alloys, 7 due to their abundance, low cost, and controllability, and these reported catalysts possess excellent catalytic activities and durable stability toward the OER. Although great advances have been made recently in the development of non-noble metal OER electrocatalysts, developing alternative OER electrocatalysts with low overpotential and high stability is highly required but remains challenging.…”