Synthesis and characterization of Co3O4 nanoplates by simple thermolysis of the [Co(NH3)6]2(C2O4)3·4H2O complex

Efficient Ammonia Production Beginning from Enhanced Air Activation

“…X‐ray powder diffraction (XRD) is conducted to analyze the crystal structure for the as‐prepared Co 3 O 4 NPs and commercial Co 3 O 4 for comparison. As shown in Figure 2b, the characteristic reflection peaks of Co 3 O 4 NPs and commercial Co 3 O 4 correspond to Co 3 O 4 with spinel structure (JCPDS No.76‐1802), [ 37,38 ] implying the successful synthesis of Co 3 O 4 phase in Co 3 O 4 NPs. Obviously, the crystallinity of Co 3 O 4 NPs is much weaker than that of commercial Co 3 O 4 , which commonly means that Co 3 O 4 NPs have smaller particle sizes or more lattice defects as active sites during the catalytic reaction (vide infra).…”

“…Developing efficient catalysts is the key to improving the eNO x RR performance. The Co 3 O 4 NPs are prepared by a pre cipitation method followed by calcination at 320 °C (Figure 2a ), [37,38] implying the successful synthesis of Co 3 O 4 phase in Co 3 O 4 NPs. Obviously, the crystallinity of Co 3 O 4 NPs is much weaker than that of commercial Co 3 O 4 , which commonly means that Co 3 O 4 NPs have smaller particle sizes or more lattice defects as active sites during the catalytic reaction (vide infra).…”

Synthesis of nickel and cobalt oxide nanoparticles by pulsed underwater spark discharges

“…Meanwhile, the second transition (4 eV) is the real bandgap of Co 3 O 4 , and it is due to charge transfer from O 2 − (π*Γ) to Co 2+ (σ*t 2 ), which corresponds to inter-band transitions. 64,67 The bandgap energy of the nanoparticles (E g, nano ) can be linked to the bandgap energy of the bulk material (E g,bulk ) and to the nanoparticles' diameter (D) through Brus's equation, 68…”

Unveiling the Surface Chemical Reactions during Multi-Phase Catalytic Oxidation of Soot on Nanoengineering/Interfacing/Doping-Prepared Mn-CeO2 Catalysts Using TG-MS and Operando DRIFTS-MS

“…To encourage soot combustion by better catalyst preparation, it is important to undertake efforts to increase the soot-catalyst interaction efficiency. The aerosol pyrolysis method is based on heating, nanoengineering, interfacing, and doping and can prepare the catalysts with rational performances. − However, no report could be found on soot oxidation using a catalyst prepared using aerosol pyrolysis.…”