Co/CoOx nanoparticles inlaid onto nitrogen-doped carbon-graphene as a trifunctional electrocatalyst

Optimization of Catalytic Sites in Cobalt‐Modified Nitrogen‐Doped Carbon towards High‐Performance Oxygen Reduction Electrocatalysts for Zinc‐Air Batteries

“…In the past research, the main focus for ORR catalysts lied in metallic nanoparticles (NPs), in which transition metals of Fe, Co, Ni have been widely studied . But the sintering and agglomeration of metals during the electrochemical process lead to degradation of catalyst and reduced stability .…”

The Role of Polyaniline Molecular Structure in Producing High‐Performance Fe‐N‐C Catalysts for Oxygen Reduction Reaction

“…The composition and molecular structures of precursors are very critical for structure formation and catalytic properties of the produced catalysts . For example, the aromatic ring and the cyanide group contained precursors are considered to benefit relatively high production of activity sites for ORR; and the use of Fe and Mn are proved to benefit the formation of graphene‐like structure, while the use of Co, Ni and Cu leads to a disordered or nanosheet structure . The ORR activities of the catalysts that produced by using different metals follow an order as Fe > Co > Cu > Mn > Ni .…”

“…For example, the aromatic ring and the cyanide group contained precursors are considered to benefit relatively high production of activity sites for ORR; and the use of Fe and Mn are proved to benefit the formation of graphene‐like structure, while the use of Co, Ni and Cu leads to a disordered or nanosheet structure . The ORR activities of the catalysts that produced by using different metals follow an order as Fe > Co > Cu > Mn > Ni . Recently, the polyaniline (PANI) derived catalysts exhibited Pt‐comparable activity towards ORR .…”

Fe3O4 Nanoparticles Supported on Arc‐synthesized Carbon Nanotubes as Advanced Electrocatalyst for Oxygen Reduction Reaction

“…Therefore, the development of low‐cost and high‐efficiency ORR electrocatalysts with their catalytic efficiencies close to Pt‐based catalysts is thus of great significance. In this endeavor, non‐precious Pt‐free ORR catalysts have been actively explored, such as heteroatom‐doped metal‐free carbon materials, transition metal oxides, metal chalcogenides, metal nanoparticles, metal/metal oxides, and etc. Among these substitutes, transition metal oxides (for example, Fe x O y , Co x O y and Mn x O y ) have been paid more attentions because of their natural advantages of low price, well‐off resources, environmental friendliness and considerable catalytic activity .…”