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Sodium hypophosphite

About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.


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Journal ArticleDOI
TL;DR: The results showed that photolysis of the three disulfide linkages in the insulin molecule occurred at random, and the thiols formed were carboxymethylated.

4 citations

Journal ArticleDOI
21 Mar 2011
TL;DR: In this article, the mechanism to explain ACD-electroless deposition of nickel layers is reviewed and the fundamental characteristics of the process underlined, in comparison with the nickel electrodeposition.
Abstract: Deposition of metals and other materials (oxide, polymer, salt) from aqueous solutions without an external current are described in the literature as electroless deposition. The mechanism to explain ACD-electroless deposition of nickel layers are reviewed and the fundamental characteristics of the process underlined, in comparison with the nickel electrodeposition. Results obtained with the secondary current pulse method during deposition with the ACD-electroless process are presented and show the main differences between the two processes: ACD-electroless process shows a reversible behaviour, whilst electroplating process is strongly irreversible. The results are interpreted according to the reactions prevailing at the reacting surface and strengthened by the electrochemical characterization performed in the ACD electrolyte and in sodium hypophosphite only solution.

4 citations

Journal ArticleDOI
TL;DR: In this paper, a composite Cu-PTFE coating was prepared by electroless copper plating with sodium hypophosphite as the reducing agent, the thickness of the composite was 5∼10μm.
Abstract: A composite Cu-PTFE coating was prepared by electroless copper plating with sodium hypophosphite as the reducing agent. The thickness of the composite was 5∼10μm. It consisted of 5 per cent PTFE an...

4 citations

Journal ArticleDOI
TL;DR: In this paper, the size of the Co nanoparticles is controlled down to 2 nm using density functional theory calculations and two H-adatoms from water are bonded onto the pyridine-like nitrogen of carbon nitride nanotubes (CNNTs).
Abstract: We report a new route to fabricate size-controlled Co nanoparticles (NPs) on carbon nitride nanotubes (CNNTs). The size of the Co nanoparticles is controlled down to 2 nm. Our density functional theory calculations provide the clue for the formation mechanism of these size-controllable Co NPs in the presence of sodium hypophosphite, water, Co2+ ions and OH− ions on the pyridine-like nitrogen of CNNTs. First, two H-adatoms from water are bonded onto the pyridine-like nitrogen while sodium hypophosphite is bonded with the oxygen of water. Next, the reduction of Co2+ ions occurs via combination with two electrons donated from these two H-adatoms. The Co NPs-CNNT fabricated via this method shows the highest hydrogen generation rate of 19.6 kg h−1 per kg of catalyst from aqueous metal hydride solution. This superior catalytic activity (about 82 times higher than that for the Co powder in the bulk state) is attributed to the increased surface area, as well as the approx. 1.5 times larger number of Co nanoparticle catalysts with about 2 nm sizes formed via mediation of the two H-adatoms bonded to the pyridine-like nitrogen.

4 citations

Patent
24 Aug 2016
TL;DR: In this article, a chemical nickel plating method for the surface of a magnesium alloy is described, which includes the following specific steps that the magnesium alloy was subjected to mechanical polishing, oil removal, oxidation film removal and activation and then put into a chemical plating solution, the temperature of the plating mixture ranges from 80 DEG C to 90 DEGC, the pH value of the mixture was adjusted with ammonia water to range from 5.0 to 6.5, and the time ranges from 30 min to 90 min.
Abstract: The invention discloses a chemical nickel plating method for the surface of a magnesium alloy. The method includes the following specific steps that the magnesium alloy is subjected to mechanical polishing, oil removal, oxidation film removal and activation and then put into a chemical plating solution, the temperature of the plating solution ranges from 80 DEG C to 90 DEG C, the pH value of the plating solution is adjusted with ammonia water to range from 5.0 to 6.5, and the plating time ranges from 30 min to 90 min; and the chemical plating solution comprises 10-25 g/L of nickel sulfate, 10-25 g/L of sodium hypophosphite, 5-20 g/L of ammonium bifluoride, 10-30 mL/L of hydrofluoric acid, 5-20 g/L of a complexing agent and 0.01-0.2 g/L of a stabilizing agent. The magnesium alloy is put into a passivation solution to be soaked for 1 minute to 3 minutes at the room temperature; and then the magnesium alloy is washed and dried and is subjected to heat treatment for 1 hour to 3 hours at the temperature of 250 DEG C to 350 DEG C, and a plating layer with the metallic luster is obtained on the surface of the magnesium alloy. The plating layer obtained through the chemical nickel plating method has the excellent corrosion resistance, the self-corrosion potential is increased greatly relative to that of a base body, and the self-corrosion current is lowered remarkably.

4 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202315
202234
202125
202051
2019116
201890