Reconstruction Effects on Surface Properties of Co/Mg/Al Layered Double Hydroxide

Sokol, Denis; Klemkaitė-Ramanauskė, Kristina; Khinsky, Aleksander; Baltakys, K.; Beganskienė, Aldona; Baltušnikas, Arūnas; Pinkas, Jiří; Kareiva, Aivaras

doi:10.5755/j01.ms.23.2.15184

Cited by 10 publications

(8 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…3 B ) [27] , [58] . The reduced intensity of CO 3 2– band observed in all exfoliated materials due to the increased inter-layer spacing as a result of forming mono-/few layer sheets after exfoliation [49] , [59] . After exfoliation, the metal–oxygen (M−O) bands around 640 cm −1 and 450 cm −1 became weaker, suggesting a decrease in the metal–oxygen bonding ( Fig.…”

Section: Resultsmentioning

confidence: 90%

The impact of ultrasonic parameters on the exfoliation of NiFe LDH nanosheets as electrocatalysts for the oxygen evolution reaction in alkaline media

Munonde

Zheng

2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

Highlights The influence of parameters on ultrasonic exfoliation of the NiFe LDH in pure water was studied. Various Concentration, amplitude, sonication times were investigated for exfoliation. The optimum condition of ultrasonic exfoliation of 60%, 10 mg mL −1 and 15 min. The best OER activity shows 250 mV overpotential at a current density of 10 mA cm −1. Enriched Fe 3+ were found on the surface of the exfoliated NiFe LDH.

show abstract

Section: Resultsmentioning

confidence: 90%

The impact of ultrasonic parameters on the exfoliation of NiFe LDH nanosheets as electrocatalysts for the oxygen evolution reaction in alkaline media

Munonde

Zheng

2021

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

show abstract

“…Layered double hydroxides have found various applications in many areas, such as catalysis 16 , drug delivery 17 , adsorption 18 , separation 19 , energy storage 20 , hydrogen and oxygen evolution reactions 21 , and corrosion protection 22 . Majority of the commercially produced LDHs are made by co-precipitation 23 , by hydrothermal synthesis 24 or via the route that combines both these methods 25 . All these three mentioned techniques make possible a production of well-crystalized product with good reproducibility; however, they are rather time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Sonication accelerated formation of Mg-Al-phosphate layered double hydroxide via sol-gel prepared mixed metal oxides

Sokol

Vieira

Žarkov

et al. 2019

Sci Rep

Self Cite

View full text Add to dashboard Cite

Single-phase magnesium-aluminium layered double hydroxide (LDH) intercalated with dihydrogen phosphate was successfully produced by hydration of nanopowder of the respective mixed metal oxide (MMO) obtained using sol-gel based method followed by a two-step anion exchange hydroxide-to-chloride and chloride-to-phosphate. The MMO with the metal cation ratio of Mg/Al = 2:1 was prepared using the aqueous sol-gel method. Processes of the parent Mg 2 Al-OH LDH formation and the successive anion-exchanges, ОН − → Cl − and Cl − → H 2 PO 4 − , were considerably accelerated via the application of high-power (1.5 kW) ultrasound. The crystalline phases formed at all stages of the Mg 2 Al-H 2 PO 4 LDH production were characterized using X-ray diffraction, scanning electron microscopy, scanning transmission electron microscopy, inductive coupled plasma optical emission spectroscopy, Fourier transform infrared spectroscopy, and thermogravimetric analysis. Based on the data of chemical analysis and the XRD data, the type of the intercalated phosphate anion was determined and the arrangement of this anion in the interlayer was modelled.

show abstract

“…Compared to Ca11, the Ca11_M sample presented a higher value for its specific surface area, which may also be related to the thickness of the interlayer affected by the OH À presence in the precipitant mixture. [48,73] Figure 9 presents the TPR profile for the Ca11_M sample, which shows one broad reduction peak starting after 400 °C with a maximum of 668 °C, a lower temperature than the Ca11 sample. Table 8 provides information on the integrated area and the deconvoluted peaks of the H 2 -TPR profile.…”

Section: Catalyst Characterization After Reaction Testsmentioning

confidence: 99%

Effect of Ca and Co over Ni–Al Mixed Oxides for Hydrogen Production by Ethanol Steam Reforming

Wenzel,

Perez‐Lopez

2023

Energy Tech

View full text Add to dashboard Cite

Ni–Al layered double hydroxide‐derived catalyst is modified with Ca and Co to improve their properties for ethanol steam reforming (ESR). The catalysts are prepared by coprecipitation and are characterized through N2 adsorption–desorption measurements, X‐Ray diffraction, temperature programmed reduction, temperature programmed oxidation, and NH3‐temperature programmed desorption. Catalyst activity tests are performed between 400 and 600 °C with the calcined catalysts and without reduction using ethanol and water in a 1:3 ratio in a fixed bed reactor with online gas chromatography analysis. The partial substitution of Ni by Co and Ca decreases the acidity of the catalyst. All samples remain stable after the reaction at 600 °C for 8 h and present a full ethanol conversion and high hydrogen selectivity, above 90%. The samples modified by Ca or Co are reduced to metallic phase during the reaction and reveal a smaller crystallite size than NiAl. The sample with Ca prepared with a different precipitant results in a catalyst with a more thermally stable active phase, low acidity, and higher specific surface area. This catalyst presents smaller crystallite size and low‐carbon formation after the reaction at 600 °C for 8 h, demonstrating higher potential for hydrogen production by ESR.

show abstract

Reconstruction Effects on Surface Properties of Co/Mg/Al Layered Double Hydroxide

Cited by 10 publications

References 24 publications

The impact of ultrasonic parameters on the exfoliation of NiFe LDH nanosheets as electrocatalysts for the oxygen evolution reaction in alkaline media

The impact of ultrasonic parameters on the exfoliation of NiFe LDH nanosheets as electrocatalysts for the oxygen evolution reaction in alkaline media

Sonication accelerated formation of Mg-Al-phosphate layered double hydroxide via sol-gel prepared mixed metal oxides

Effect of Ca and Co over Ni–Al Mixed Oxides for Hydrogen Production by Ethanol Steam Reforming

Contact Info

Product

Resources

About