Controlled growth of porous oxygen-deficient NiCo₂O₄ nanobelts as high-efficiency electrocatalysts for oxygen evolution reaction

Abstract

Owing to the distinctive chemical properties and cost-effectiveness, transition metal oxides (TMOs) promise intriguing potential in electrocatalysis applications. Herein, porous NiCo2O4 nanobelts with controlled oxygen deficiencies were synthesized based on...

NiFe2O4 Nanofibers with Surface Oxygen Vacancies for Piezo-Catalytic Hydrogen Peroxide Production

“…The crystal structure of the NFO samples with oxygen defects was not significantly varied, meaning that a new phase was not formed by annealing in different atmospheres. The diffraction peaks showed a slight shift, which may be the result of the oxygen vacancies for the samples in addition to the annealing atmosphere under the other similar preparation conditions. , …”

“…The diffraction peaks showed a slight shift, which may be the result of the oxygen vacancies for the samples in addition to the annealing atmosphere under the other similar preparation conditions. 28,36 The morphology and microstructure of NFO−N 2 were characterized by SEM and TEM. Figure 1c,d shows the wellformed nanofibers of the samples.…”

“…Peng et al reported that the oxygen precipitation reaction of NiFe 2 O 4 was promoted by constructing oxygen defects . Controlled porous NiCo 2 O 4 as high-efficiency electrocatalysts were synthesized by Yao et al Therefore, the introduction of oxygen defects into anti-spinel materials has a wide range of applications in pollutant degradation, CO 2 reduction, hydrogen evolution, H 2 O 2 production, and other aspects. − The appropriate amount of oxygen deficiency can enhance the active site, promote charge transfer, and accelerate redox reactions to increase piezoelectric catalytic activity. − However, the application of spinel piezoelectric catalysts with oxygen defects has been less studied. Therefore, it is meaningful to explored if NiFe 2 O 4 (NFO) with adjustable oxygen defects becomes a potentially versatile piezoelectric catalyst among numerous anti-spinel materials.…”

“…26 Peng et al reported that the oxygen precipitation reaction of NiFe 2 O 4 was promoted by constructing oxygen defects. 27 Controlled porous NiCo 2 O 4 as high-efficiency electrocatalysts were synthesized by Yao et al 28 Therefore, the introduction of oxygen defects into anti-spinel materials has a wide range of applications in pollutant degradation, CO 2 reduction, hydrogen evolution, H 2 O 2 production, and other aspects. 29−31 The appropriate amount of oxygen deficiency can enhance the active site, promote charge transfer, and accelerate redox reactions to increase piezoelectric catalytic activity.…”

In situ grown hierarchical NiO nanosheet@nanowire arrays for high-performance electrochromic energy storage applications

“…The characteristic spectrum of the colored film exhibits two peaks at 474 and 557 cm −1 attributed to the e g bending vibration and A 1g stretching vibrational modes in NiOOH, respectively. 69–71 Compared to the uncycled colored state film, the peak of the cycled film is sharper and a characteristic peak located at 550 cm −1 appears, indicating an increased NiOOH concentration. Moreover, in the bleached state, the broad peak at 1095 cm −1 is lower in intensity than that of the initial bleached film, implying a lower amount of NiO.…”