Ultra-small, size-controlled Ni(OH)2 nanoparticles: elucidating the ...
网页2015年6月5日 · Three identified Raman peaks at ~310, ~450 and ~3580 cm −1 are observed, which can be assigned to the E-type vibration of the Ni-OH lattice, Ni-O stretching (vNi-O) and symmetric stretching...
Ni/NiO nanosheets for alkaline hydrogen evolution reaction: In …
网页2020年11月20日 · The Raman band at 446 cm −1 is related to metal-oxygen vibrations (ν Ni−O) A 1g in β-Ni(OH) 2. The Raman peak at 519 cm −1 is best assigned to a second-order acoustic mode of β-Ni(OH) 2 [51, 52, 53, 54, 55, 42, 56, 52]. The potential dependence of the Raman spectra of surface β-Ni(OH) 2 on NiO is presented in Fig. 4 d.
A Review on the Application of In-Situ Raman …
网页The improved HER electrocatalytic performance of the Ni/β-Ni(OH) 2 composite can be attributed to Ni(OH) 2 efficiently dissociating water to form hydrogen intermediates, and the improved electrical conductivity from the formation of an ohmic contact between the metal and metal hydroxide.
Applications of in Situ Raman Spectroscopy for Identifying Nickel ...
网页2014年2月6日 · We conclude that Raman spectroscopy may be applied to observe Ni(OH) 2 materials in situ during chemical and electrochemical treatments. Such measurements provide information on the proportions of α- and β-Ni(OH) 2 and their fine structural details with high sensitivity.
Raman and Infrared Spectroscopy of α and β Phases of Thin …
网页2012年5月29日 · Ni(OH) 2 films can be rapidly identified in pure and mixed samples using Raman or IR spectroscopy by measuring their strong O–H stretching modes, which act as fingerprints. Thus, this work establishes methods to measure the phase, or phases, and disorder at a Ni(OH) 2 sample surface and to correlate desired chemical properties to their ...
Amorphous nickel hydroxide nanospheres with ultrahigh capacitance …
网页2013年5月21日 · Two major peaks with binding energies at 857.2 and 874.8 eV correspond to Ni 2p 3/2 and Ni 2p 1/2, respectively, yielding a spin-energy separation of 17.6 eV characteristic of the Ni...
Structure of Ni(OH) 2 intermediates determines the efficiency of …
网页The NiO NS are obtained upon annealing of preformed β-Ni (OH) 2 into pristine NiO with low defect concentrations and favorable electronic configuration for dye sensitization. The NiO NS consist of fibers self-assembled from nanoparticles yielding a …
Synergistic Effect of Ni/Ni(OH)2 Core‐Shell Catalyst Boosts …
网页2024年4月23日 · In situ Raman spectroscopy reveals Ni and Ni (OH) 2 are interconvertible according to the applied potential, facilitating the cascade nitrate reduction synergistically.
Single atom tungsten doped ultrathin α-Ni(OH) 2 for enhanced
网页2019年5月14日 · Here, we report one single atom W 6+ doped Ni (OH) 2 nanosheet sample (w-Ni (OH) 2) with an outstanding oxygen evolution reaction (OER) performance that is, in a 1 M KOH medium, an...
In situ Raman spectroscopic study towards the growth and …
网页2021年8月3日 · In situ Raman spectroscopy reveals the gradual growth of Ni/Ni(OH) 2 heterostructure during the first 30 min of the aging treatment and combined with polarization measurements, it suggests a positive relation between the Ni/Ni(OH) 2 amount and HER performance of the electrode.