Controlled Incorporation of Ni(OH)₂ Nanoplates Into Flowerlike MoS₂ Nanosheets for Flexible All‐Solid‐State Supercapacitors

Unprecedented Synthesis of Holey 2D Layered Double Hydroxide Nanomesh for Enhanced Oxygen Evolution

“…The energy dispersive X‐ray spectra (EDS) analysis demonstrates the existence of Co, O, and Br (Figure e). XPS results (Figure b) further reveal that the satellite peaks become much weaker than those before oxidation, proving the co‐existence of Co 2+ and Co 3+ . The SEM image (Figure S3, Supporting Information) shows that, due to the topotactic nature of the conversion, the formed LDHs inherited the morphology and mesopores from their brucite‐like precursor.…”

“…In the high‐resolution X‐ray photoelectron spectroscopy (XPS) spectrum of Co 2p (Figure b), two bands centered at 780.6 and 796.7 eV correspond to the Co 2p 3/2 and Co 2p 1/2 spin–orbit peaks of Co(OH) 2 phase, respectively. The appearance of two strong satellite peaks is attributed to the Co 2+ oxidation state . The transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images (Figure c and Figure S1a, Supporting Information) reveal the hexagonal shaped MSC Co(OH) 2 nanoplates with about 1 µm in size.…”

“…The appearance of two strong satellite peaks is attributed to the Co 2+ oxidation state. [14] The transmission electron microscopy (TEM) and scanning electron microscopy (SEM) images ( Figure 2c and Figure S1a, Supporting Information) reveal the hexagonal shaped MSC Co(OH) 2 nanoplates with about 1 µm in size. Due to the inherent hexagonal lamellar structure, β-Co(OH) 2 single crystals tend to grow into hexagonal shape.…”

“…XPS results ( Figure 2b) further www.advenergymat.de www.advancedsciencenews.com reveal that the satellite peaks become much weaker than those before oxidation, proving the co-existence of Co 2+ and Co 3+ . [14] The SEM image ( Figure S3, Supporting Information) shows that, due to the topotactic nature of the conversion, the formed LDHs inherited the morphology and mesopores from their brucite-like precursor. For brucite, the octahedral basic layers are held together by Van der Waals forces, whereas the octahedral sites created by OH ions are occupied by divalent Co 2+ cations.…”

Microstructural and electron framework-engineered 3D NiSeP-integrated CuFe composites as trifunctional electrocatalysts for sensing and urea-assisted water-splitting applications

“…66 For the Ni(OH) 2 @NCW electrode, the existence of peaks around 310 and 450 cm −1 denotes the Raman signals of Ni(OH) 2 microstructures docked over the NCW support. 67 It can be observed that both the characteristic Raman signals of Ni(OH) 2 and CF composite coexisted in the prole of Ni(OH) 2 -CF@NCW, indicating the successful decoration of Ni(OH) 2 aky microarchitectures over the CF composite. As shown in the spectrum of NS-CF@NCW, the vibrational signals appeared around 154, 220, and 242 cm −1 representing the phonon modes of Ni-Se in NS, whereas the minor peaks around 208 and 271 cm −1 can be assigned to the vibrational modes of the Se-Se pair.…”