Cactus-like NiCo2S4@NiFe LDH hollow spheres as an effective oxygen bifunctional electrocatalyst in alkaline solution

Probing the Co role in promoting the OER and Zn–air battery performance of NiFe-LDH: a combined experimental and theoretical study

“…O, 10 mmol NH 4 F, and 25 mmol urea were co-dissolved in 50 mL of deionized water under stirring. 34 Then, the mixture was subjected to sonication for 30 min to ensure that all the reagents were dissolved. Subsequently, the solution was transferred into a Teon autoclave (50 mL) and heated at 120 C for 8 h. The as-obtained solid was washed several times with DI water and ethanol, collected by centrifugation, and then dried for 12 h. The collected white solid is the nal product NiFe-LDH.…”

Layered Double Hydroxide Catalysts Preparation, Characterization and Applications for Process Development: An Environmentally Green Approach

“…There are enormous applications of LDHs catalysts, with few examples used as support for different catalytic materials [3-5] and as catalysts for organic transformations such as epoxidation reaction of olefins (styrene, cyclohexene) Mg-Al hydrotalcite [6], Aldol and Knoevenagel condensation Ni-Al hydrotalcite [7], Heck-Suzuki reaction Mg Al-LDH-Pd° [8], hydroxylation of phenol, Michael reaction, transesterification CoNiAl hydrotalcite, LDHs as oxidation catalysts [9][10][11] and CO2 absorbents [9], anion exchangers Ni-Al-LDH-Sn [10]. LDHs has vast applications in the area of environmental catalysis (Table 1), CuMgAl LDHs, which can be used in diesel engine soot [11][12][13], ion exchange/adsorption [14], drugs-Levodopa LDH nano composite shows minimal toxicity potential of a PC12 cell Parkinson's disease model in a dose [15], anti-cancer nano medicine [16], Lysozyme-LDH for antimicrobial activity [17], MgFe LDH-Mo can be used for degradation of methyl orange by photochemical method [18], Iron(III) Porphyrin MgAl LDHs [19,20], electroactive and photoactive materials MgAlCu Hydrotalcite [12], electrochemistry [21,22], fuel cell, and water splitting [22][23][24][25][26], LDHs carbon nano composites Ni/Co supercapacitors [27], Mg Al LDHs nano flakes humic acid adsorption [28], Biochar-Fe LDH for phenol removal [29], waste water treatment [30], LDHs nano carriers for drug delivery [31], LDHs based nano systems for cancer therapy [32], NiCo2S4@NiFe LDH hollow spheres as electrocatalysts [33]. Many reviews have been published focusing over particular examples, i.e.…”

New Aptamer/MoS2/Ni-Fe LDH Photoelectric Sensor for Bisphenol A Determination

“…Satellite peaks appeared at 878.9 and 861.7 eV. The peaks at 712.4 and 724.6 eV in the Fe 2p species ( Figure 2 C) were attributed to the Fe 2p 3/2 and Fe 2p 1/2 states of Fe 3+ , which appeared because Fe in NiFe-LDH existed in the 3+ oxidation state [ 33 ]. The peaks in the XPS spectrum of Mo 3d 3/2 at 231.6 eV and Mo 3d 5/2 at 228.4 eV were attributed to Mo 4+ in Figure 2 D [ 34 , 35 ].…”