Ni(OH)₂ Coated CoMn-layered double hydroxide nanowires as efficient water oxidation electrocatalysts

Abstract

Core-shell nanowires of first-row transition metals are important members of nanostructured electrocatalysts for water oxidation owing to their superior electrocatalytic performance and tremendous promise as substitutes for noble-metal-based electrocatalysts. Recently,...

Effect of Iron Concentration and Annealing Conditions on the Catalytic Performance of Co–Mn Spinel Oxides with a Unique Nanowire–Nanosheet Coexisting Structure for Water Oxidation

“…To investigate the origin of outstanding OER performance and crystallinity effect due to calcination, XRD analysis was carried out at different calcination temperatures (Figure S5c). XRD images revealed that before annealing, the original sample exhibited a typical LDH structure (JCPDS no. 10-0144).…”

“…Then, dry nitrogen was used for drying the NFs. Based on our previous study, 10 the Co/ Mn molar ratio of 4:1 was further employed to synthesize precursors. A homogeneous precursor solution was then prepared by dissolving 2 mmol Co(NO 3 ) 2 •6H 2 O (0.5821 g), 0.5 mmol MnSO 4 •H 2 O (0.0845 g), 0−2 mmol FeCl 3 •6H 2 O (0−0.5406 g), 6 mmol CH 4 N 2 O (0.3604 g), and 5 mmol NH 4 F (0.1850 g) in 40 mL of ultrapure water.…”

“…Therefore, high-activity, earth-abundant, inexpensive, non-noble elements-based electrocatalysts are seen as potential candidates for water oxidation research. Until now, some success has been achieved with the use of non-precious metal-based catalysts for water oxidation. − This includes spinel transition metal-based oxides (TMO, such as NiMn 2 O 4 , FeCo 2 O 4 , CoMn 2 O 4 , and Co 2 MnO 4 ). For instance, Menezes and co-workers synthesized NiMn 2 O 4 with predesign ratios of Ni/Mn to boost the efficiency of OER .…”

Cucurbit[6]uril supported β-Ni(OH)2 nanoparticles as a heterogeneous catalyst for the synthesis of quinazolines via acceptorless dehydrogenative coupling of alcohols with nitriles

“…38,39 Nickel nanoparticles and their oxides have emerged as efficient catalysts in hydrogenolysis, 40,41 dehydrogenation, 42 condensation reactions, 43,44 reduction reactions, 45 and C-C bond formation. [46][47][48] A perusal of the literature reveals that Ni(OH) 2 NPs have been used in the field of electrocatalysis, [49][50][51][52][53] photocatalysis, [54][55][56][57] supercapacitors, [58][59][60][61] and heterogeneous catalysis, [62][63][64] yet Ni(OH) 2 NPs remain relatively less explored in the arena of catalysis. Unsupported Ni(OH) 2 NPs exhibit a tendency to agglomerate.…”

Highly Efficient and Stable Overall Water Splitting Electrocatalyst α-Co(OH)2@PN/NF with Hierarchical and Mesoporous Structure

“…In another work, 3D r-FeOOH/α-Ni(OH) 2 /NF with binary hybridized heterostructure was synthesized by fast room temperature reduction, and a small potential of 1.66 V was required for a large current density of 1.5 A cm −2 in base media. Li et al 24 synthesized Ni(OH) 2 @CoMn-LDH core-shell nanowires on nickel foam (NF) by hydrothermal process and followed by electrodeposition, which remained stable over 25 h.…”