Abstract. An oxygen evolution catalyst that forms as a thin film from Ni (aq) (2+) solutions containing borate electrolyte (Ni-B (i)) has been studied by in situ X-ray absorption spectroscopy. A dramatic increase in catalytic rate, induced by anodic activation of the electrodeposited films, is accompanied by structure and oxidation state changes.
A heterostructure of nickel boride/nickel catalyst was successfully developed for methanol electrooxidation reaction (MOR), delivering nearly formate …
Nickel(III) Borate • Na 3 BO 3. Sodium Borate • Mg(BO 3) 2. Magnesium Peroxoborate • Mg 2 B 2 O 5. Magnesium Pyroborate • K 3 BO 3. Potassium Borate • Mg 3 (BO 3) 2. Magnesium Borate • Na 4 B 2 O 5. Sodium Diborate • Na 2 B 4 O 7. Sodium Tetraborate • NaB 5 O 8. Sodium Pentaborate • Ca 3 (BO 3) 2. Calcium Borate • Na 2 B 6 O ...
As a three-dimensional electrode, Ni−Bi NA/TM exhibits high catalytic activity toward the oxygen evolution reaction and requires a low overpotential of 430 mV at 10 mA cm −2 in 0.1 m potassium borate (pH …
Metal borates for SIB anode: The CNBO as anode material shows a high initial reversible specific capacity of 544.2 mAh g −1 and retains good cycling performance with outstanding rate capabilities for SIBs. And the sodium-ion full cell using NVP cathode and CNBO anode shows a maximum energy density of 146 Wh kg −1, while maintains excellent cycle …
Herein we synthesized a series of amorphous nickel borate (AM-NiBO) nanosheets by varying corrosion time with in-situ electrochemical corrosion method. The …
Crystallinity-dependent activity was demonstrated on a new efficient electrocatalyst for the oxygen evolution reaction (OER) which consists of a nickel(II) borate thin layer on nickel boride (NB) nanoparticles (Ni-B i @NB) (see figure). The partially crystalline Ni-B i catalyst exhibits excellent OER performance.
Borate antimony glass doped with vanadium oxide V 2 O 5 and nickel ferrite NiFe 2 O 4 was prepared with a composition of (49.95-x) B 2 O 3 + 50 Sb 2 O 3 + 0.05 NiFe 2 O 4 + x V 2 O 5, x = (0.1, 0. ...
Nickel (atomic symbol: Ni, atomic number: 28) is a Block D, Group 4, Period 4 element with an atomic weight of 58.6934. The number of electrons in each of nickel's shells is [2, 8, 16, 2] and its electron configuration is [Ar]3d 8 4s 2. Nickel was first discovered by Alex Constedt in 1751.
The compound nickel (II) nitride consists of a nickel ion with a +2 charge and a nitride ion with a -3 charge. Since this compound is neutral, the charges must balance.
Nickel-borate oxygen-evolving catalyst that functions under benign conditions Mircea Dinca, Yogesh Surendranath, and Daniel G. Nocera1 ... as borate, is essential for facile electrodeposition and catalysis. ^^^^^ 80 85 90 95 100 I I I I I I I I I I I I I I I 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 V (vs NHE) Fig. 2. CVs scans of a Ni borate ...
The adsorption of borate ions at the nickel and/or nickel oxide-electrolyte electrochemical interface was studied at various concentrations and pH values in lithium and borate solutions. First, the passivation range of nickel was estimated using cyclic voltammetry. ... Electricité de France, Centre de recherche des Renardières, 77818, Moret ...
In this communication, a nickel-borate nanoarray supported on carbon cloth (Ni-Bi/CC) has been fabricated through oxidative polarization of a nickel oxide nanoarray on CC (NiO/CC) in a borate …
Moreover, this Ni−B i /RGO nanohybrid also displays excellent performance under near neutral condition, with a low onset potential of 352 mV and Tafel slop of 176 mV dec −1 in 0.1 m potassium borate (KB i, pH 9.2), better than most of Ni-based OER catalysts. Our research has paved a facile path for the development of highly active ...
The Li metal battery with ultrahigh-nickel cathode (LiNi x M 1− x O 2, M = Mn, Co, and x ≥ 0.9) under high-voltage is regarded as one of the most promising approaches to fulfill the ambitious target of 400 Wh/kg. However, the practical application is impeded by the instability of electrode/electrolyte interface and Ni-rich cathode itself.
Nickel (3+) borate. Molecular Formula BNiO. Average mass 117.503 Da. Monoisotopic mass 116.929398 Da. ChemSpider ID 26947398. - Charge.
The B–O bond lengths in BO 2 (1.255 Å) are shorter than the mean values of BO 3 (1.385 Å) and BO 4 (1.475 Å), respectively, and the O–B–O angle refined to 180°, which conforms to sp ...
The synthesis procedure of Ni-B i /Ti-Fe 2 O 3 nanofilms grown on fluorine-doped SnO 2 (FTO) glass substrates is shown in Fig. 1a. The pre-cleaned FTO glass was placed into the aqueous solution containing FeCl 3 •6H 2 O, NaNO 3, and TiCl 3 to prepare Ti-doped Fe 2 O 3 nanorod arrays with hydrothermal method. Then, the nickel-borate …
The influence of nickel-oxide (NiO) addition on the structural, optical, physical properties, and dielectric spectroscopy of lead-borated glass blocks of the chemical form: (70-x)B2O3-25Na2O-5PbO-xNiO: x = 0 (Ni-0.0)-2.5 (Ni-2.5) molar percentage was tested experimentally using various methods. X-ray diffraction measurements confirmed the …
This boride-derived oxide catalyzes oxygen evolution with an overpotential of 167 mV at 10 mA/cm 2 in 1 M KOH electrolyte and requires a record-low overpotential of …
Herein, we demonstrate a simple strategy to engineer 2D nickel boride/borate amorphous/amorphous heterostructures using a simple one-pot chemical reduction method, and provide a detailed insight into their electrocatalytic and magnetic performance. All heterostructures exhibited the same morphology with an amorphous …
This Ni-Bi/CC electrode exhibits superior catalytic activity for water oxidation in 0.1 M potassium borate (K-Bi) solution, yielding a geometrical catalytic current density of 10 mA cm-2 at an overpotential of 470 mV, and demonstrates outstanding long-term electrochemical durability for 25 h with Faradaic efficiency. The exploration of high …
B Macdougall, MJ Graham, Growth of thick anodic oxide-films on nickel in borate buffer solution. J Electrochem Soc 128, 2321–2325 (1981). Crossref. Google Scholar. 16. ... MRG de Chialvo, AC Chialvo, Oxygen evolution reaction on thick hydrous nickel-oxide electrodes. Electrochim Acta 33, 825–830 (1988).
Catalytic reforming of liquid hydrocarbons to produce H 2-enriched fuel in an auxiliary power unit is essential to the operation of fuel cell on board.This study explored ceria-supported nickel borate [Ni 3 (BO 3) 2] catalyst for conducting the above reaction under autothermal reforming (ATR) condition.In the present catalytic system operating at …
Much research attention has been paid to transition metal borates, especially nickel borate, for their potential application in energy conversion and storage. Herein, for the first time, amorphous nickel borate has been synthesized via a facile and scalable co-precipitation method at room temperature and hybrid supercapacitors have …
J O U R N A L O F M A T E R I A L S S C I E N C E 3 8 (2 0 0 3 ) 4041 – 4046 Study of nickel passivation in a borate medium M. BOINET, S. MAXIMOVITCH, F. DALARD Laboratoire d'Electrochimie et de Physico-Chimie des Matériaux et des Interfaces, UMR CNRS-INPG 5631, E.N.S.E.E.G., Domaine Universitaire, BP 75, 38402 Saint Martin …
The assembled AZBs with nickel borate as cathode electrode and zinc as anode materials has the capacity of 0.4 mAh/cm 2, Furthermore, its energy density can reach 0.77 mWh/cm 2 at 1.76 mW/cm 2. As shown in Fig. 1, AM-NiBO is synthesized by one-step in-situ potentiostatically electrochemical corrosion on nickel in 0.1 mol/L …
The development of high-performance, low-cost, and long-lasting electrocatalysts for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is urgently needed for effective electrochemical water splitting. In the present study, an engineering process was employed to prepare " base-hungry" amorphous–crystalline nickel …
One explanation could be the complexation of nickel ions by (poly)borates, which can increase the solubility of the solid phases. Two principal studies have focused on the nickel–boron complex formation. Palmer et al. have studied the solubility of nickel hydroxide in different media, including low concentrations of boric acid [6].
The free-standing pre-catalyst of NiFeB supported on Ni was fabricated by a straightforward electro-deposition method realized through CV (Fig. 1 a).During the preparation process, the oxygen vacancies can be generated in NiFe LDH due to the larger ionic radius of Fe 3+ than that of Ni 2+.Meanwhile, the borate species …
The results of this study suggest that complexation of nickel ions by borates can significantly enhance the solubility of nickel metal and nickel oxide depending on the concentration of boric acid and pH.
Amorphous hierarchical nanostructured nickel boride (Ni x B) /nickel borate (NiB x O y) composite (NB) materials were synthesized (Fig. 1 a) by facile chemical coprecipitation method.An aqueous solution of nickel nitrate hexahydrate (Ni(NO 3) 2 ·6H 2 O) and sodium borohydride (NaBH 4) were mixed in three different proportions (2:1, 1:1, …
Here, a heterostructure of nickel boride/nickel catalyst is developed to enable methanol electrooxidation into formate with a Faradaic efficiency of nearly . Operando electrochemical impedance ...
In this study, borate doping of nickel sulfide was found to yield catalysts which are effective for total water electrolysis. For the borate-doped nickel sulfides ((BO 3 ) x −Ni 3 S 4, x=0, 0.57, 0.78 and 1.08), the strong affinity of borate for hydroxyl groups facilitates the dissociation of adsorbed water molecules to oxygen.
Amorphous nickel borate (Ni-B i) cocatalyst is in-situ grown on ZnIn 2 S 4 nanosheets. • The Ni-B i accelerates the charge transfer and provides abundant active sites. • The composites show high photoactivity for benzaldehyde production and H 2 generation. • The optimal photoactivity of ZnIn 2 S 4 /Ni-B i is 23 times that of blank ZnIn …
Thin catalyst films with electrocatalytic water oxidation properties similar to those of a recently reported Co-based catalyst can be electrodeposited from dilute Ni2+ solutions in borate electrolyte at pH 9.2 (Bi). Thin catalyst films with electrocatalytic water oxidation properties similar to those of a recently reported Co-based catalyst can be …
In order to further boost the UOR kinetics, nickel borate (Ni–B i) is synthesized by a facile co-precipitation method, forming a nanosheet morphology and 3D hierarchical porous …
