Core@shell structured Co–CoO@NC nanoparticles supported on nitrogen doped carbon with high catalytic activity for oxygen reduction reaction

Abstract

A simple method has been developed for the synthesis of Co–CoO@NC/NC, which exhibits high and stable performance for the ORR.

Hierarchical porous zeolitic imidazolate frameworks (ZIF-8) and ZnO@N-doped carbon for selective adsorption and photocatalytic degradation of organic pollutants

“…22,51 As indicated from the XPS results illustrated in Fig. 1b, different oxygenated components were introduced to the developed ZnO@N-doped C. Hence, the adsorption of MeB on ZnO@N-doped C might be ascribed to the electrostatic interactions between the amino components of MeB and the oxygen components presented in ZnO@N-doped C. 51,52 Under UV light irradiation, the photocatalyst is expected to absorb the light energy creating reactive species such as hydroxyl radical (cOH) or ðO À 2 Þ. The formation of cOH was evaluated via the uorescence emission spectra using terephthalic acid (TPA, non-uorescence agent) that was converted to 2-hydroxy terephthalic acid (TPA-OH, C 6 H 4 (COOH) 2 + 2OHc / C 6 H 3 (COOH) 2 OH + H 2 O, uorescent agent, Fig.…”

Confinement Effects in Individual Carbon Encapsulated Nonprecious Metal‐Based Electrocatalysts

“…[85,122,167] Recently, alloying, doping, and heterojunction constructing are the three main strategies for modulating the NPM-based cores in order to design appropriate core-shell catalysts in different electrocatalytic systems (Figure 5). [67,111,168] In this review, alloying design particularly means the combination of no less than two kinds of different elements (including at least one metallic element) of similar amounts, so that the final core has the new alloy properties compared to the single element core. Whereas the doping design mainly refers to the introduction of small amount of heteroatom elements (including metallic elements and nonmetallic elements) into the NPM-based cores.…”

“…TEM image and LSV curves in C) Reproduced with permission. [ 168 ] Copyright 2018, Royal Society of Chemistry.…”

Cobalt-loaded cherry core biochar composite as an effective heterogeneous persulfate catalyst for bisphenol A degradation

“…As shown in Fig. 2d , the Co 2p spectrum consisted of two spin orbit peaks and two satellite peaks of Co 2p 1/2 and Co 2p 3/2 , and the peaks of Co 0 (778.8 eV, 794.1 eV) and Co 2+ (780.5 eV, 796.5 eV) were found in Co 2p 1/2 and Co 2p 3/2 , 36 confirming the existence of Co and CoO crystals; this was consistent with the XRD results.…”