Electrocatalytic Performance of Electroless Deposited Nickel Boride Materials for Water Oxidation

Overview of nickel boride Ni2B powder

Nickel boride is a compound of nickel and boron, and its molecular formula is Ni2B. It is one of the borides of nickel. The chemical formula "Ni2B" and the name "nickel boride" are generally used for nickel boron catalysts obtained by reacting nickel salts with sodium borohydride. To

Nickel boride catalysts can reduce unsaturated ethers, alcohols, aldehydes, esters, amines and amides to corresponding saturated compounds without hydrogenation. Unsaturated nitriles can be reduced to primary amines, while the epoxide remains unchanged. In addition to sodium borohydride, dimethoxyborane (Meo) 2BH4 or lithium borohydride LiBH4 can also be reacted with nickel chloride to obtain a nickel boride catalyst for this type of reaction. It is worth emphasizing that in the combined catalytic reduction of 2-methylquinoline and various transition metal salts (such as CoCl2, NiCl2, CuCl2, CrCl3, and sodium borohydride), only NiCl2 exhibits catalytic activity.

At present, fossil energy is on the verge of exhaustion, and energy and environmental issues have become increasingly prominent. Compared with traditional energy sources, hydrogen energy has the advantages of environmental friendliness, recyclability and high efficiency, so it has become a kind of energy with greater application prospects. The primary problem in the use of hydrogen energy is how to efficiently, low-cost, and sustainably produce At present, there are mainly four methods of hydrogen production from fossil fuels, hydrogen production from biomass, hydrogen production from photolysis of water, and hydrogen production from water electrolysis. The principle of hydrogen production by electrolysis of water is simple, the equipment cost is low, the process is relatively mature, and it is in line with sustainable development. Therefore, it has become a research hotspot. Under alkaline conditions, the electrolysis water reaction consists of two half reactions, namely the hydrogen evolution reaction at the cathode (HER: 2H2O+2e-→H2+2OH-) and the oxygen evolution reaction at the anode ( OER:4OH-→O2+2H2O+4e-). However, in actual operation, the existence of high barrier makes both reactions very slow and requires a higher overpotential. Especially the oxygen evolution reaction at the anode, due to the higher overpotential The existence of potential causes a large amount of energy loss, making it difficult for electrolyzed water to be used commercially. At present, researchers generally believe that noble metal anode catalysts (such as IrO2, RuO2) have excellent performance, but their price is expensive and the output is scarce. Fit.

Graphene (Graphene), nickel mesh (Ni foam, NF), titanium mesh (Ti mesh, TM), and carbon cloth (CC) supported nickel boride materials are prepared by electroless deposition/electroless plating methods. The nickel boride layer grown on the graphene substrate is composed of regular nanoparticles and is uniform and dense. The electrocatalytic performance of several materials for water oxidation under alkaline conditions (1.0 mol/L KOH electrolyte) was carried out. The results show that the nickel boride material (NiB_x/graphene) grown on the graphene substrate has the best electrocatalytic performance for water oxidation. The overpotential when the current density reaches 10 mA/cm~2 is only 277 mV, correspondingly The Tafel slope is 57 mV/dec. The graphene-supported nickel boride material is sintered, and the measured overpotential is 330 mV. Compared with the unsintered sample, the electrocatalytic activity is decreased. The graphene-supported material prepared by this method is Nickel boride materials have both high electrocatalytic activity and stability, providing a new idea for the preparation of low-cost, high-efficiency water oxidation non-precious metal electrocatalysts.

Application of Nickel Boride Ni2B Powder

The nickel boride catalyst is prepared by reacting nickel chloride and nickel chloride with a borohydride reagent (such as NaBH 4 of sodium borohydride). It can be used for selective hydrogenation reaction, desulfurization reaction, dehalogenation reaction, hydrolysis reaction and reduction reaction of functional groups such as nitro group.

The nickel boride catalyst prepared by the reaction of NiCl2 and NaBH4 can also be used for the desulfurization reaction. Compared with the Raney nickel catalyst used in the traditional desulfurization reaction, a higher yield can be obtained, and the disadvantages of Raney nickel, such as strong alkali, flammability, and sensitivity to air and moisture, are avoided.

In addition, thioamides, sulfides and sulfides can all be desulfurized under the catalysis of nickel boride to obtain corresponding hydrocarbons. In the presence of nickel boride, primary, secondary and tertiary aliphatic nitro compounds can be reduced to amines.

The combination of NiCl2/NaBH4 can also achieve dehalogenation and hydrolysis reactions, reducing many α-bromoketones to ketones, or reducing dibromoketones to alkenes, and reducing benzyl, allyl and propargyl esters to corresponding alkanes .

Nickel boride Ni2B powder price

The price of nickel boride Ni2B powder varies randomly with factors such as production cost, transportation cost, international situation, exchange rate, and supply and demand of nickel boride Ni2B powder market. Tanki New Materials Co., Ltd. aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for nickel boride Ni2B powder, please feel free to contact us for the latest price of nickel boride Ni2B powder.

Supplier of Nickel Boride Ni2B Powder

As a global supplier of nickel boride Ni2B powder, Tanki New Materials Co., Ltd. has extensive experience in advanced engineering material properties, applications and cost-effective manufacturing. The company has successfully developed a series of boride powder materials (including nickel boride Ni2B powder, molybdenum boride, tungsten boride, etc.), high-purity targets, functional ceramics and structural devices, and provide OEM services.