In situ construction of Co/Co3O4 with N-doped porous carbon as a bifunctional electrocatalyst for oxygen reduction and oxygen evolution reactions

Electrocatalytic oxygen reduction by a Co/Co3O4@N-doped carbon composite material derived from the pyrolysis of ZIF-67/poplar flowers

“…The following d -spacings, 0.34, 0.18, and 0.24 nm, are assigned to the (002) plane of graphite carbon, (200) plane of Co, and (311) plane of Co 3 O 4 , respectively. 26 The elemental mapping images (Fig. S3, ESI † ) further indicate that Co, C, N, and O are distributed homogeneously on the Co/Co 3 O 4 @NC sample.…”

Plasma‐Assisted Synthesis of Co3O4‐Based Electrocatalysts on Ni Foam Substrates for the Oxygen Evolution Reaction

“…[ 7,12,16,17 ] Nevertheless, since bulk Co 3 O 4 presents a low surface area and—similarly to many transition metal oxides—suffers from a modest electronic conductivity, the full exploitation of its electrochemical performances inevitably requires a tailored design and engineering of the anode structure. [ 5,16,18–23 ] To this aim, important degrees of freedom are offered by a proper choice of the substrate, the modulation of the catalyst properties, and, eventually, the introduction of suitable co‐catalysts, whose synergistic interactions with Co 3 O 4 may afford a favorable improvement of the resulting electrochemical behavior. As concerns the substrate, the use of porous and highly conductive scaffolds enables an efficient catalyst dispersion and adhesion on the substrate, providing thus favorable pathways for both mass and charge transport.…”

A multi-functional porous cobalt catalyst for the selective hydrogenative ring-opening and rearrangement of furfural to cyclopentanol

“…The shakeup satellites located at 785.6 eV and 789.2 eV were assigned to Co 2p 3/2 , while those at the binding energies of 802.7 eV and 805.3 eV were attributed to Co 2p 1/2 , indicating that the oxidation states of Co were Co 2+ and Co 3+ , respectively. 21 The existence of metallic Co 0 species in the Co-200 catalyst was seen from the shoulder peaks around Co 2p 1/2 at 794.9 eV and Co 2p 3/2 at 779.7 eV. 22 These results confirmed that the Co-200 catalyst contained both Co 0 and Co 3 O 4 species.…”