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Summary of cuprous oxide (Cu2O) powder It is a red powdery solid, and it does not easily decompose in water. It is a bright red powdery solid that decomposes water very slowly. Copper oxide is used in the production of antifouling (to kill small marine animals), various copper salts for analytical purposes, red glasses, and copper coatings.
When used and stored as per the specifications, cuprous oxide is not known to decompose. It also does not react with air or vertical surfaces. Cuprous Oxide will not form copper salts with dilute sulfuric acids, but will substitute nitric. Soon it will turn blue. Even though cuprous oxide is stable when dry, it will oxidize slowly near air to produce copper oxide. Therefore, oxygen scavengers are needed. A reducing agent can easily reduce it to metallic Copper. Cuprous oxide, which is insoluble with water, is dissolved using aqueous ammonia and concentrated hydrohalic solution.

What is the color of cuprous oxide?
By using electrolysis or furnaces, cuprous oxide can be made. It can be reduced easily to metallic copper using hydrogen, carbon dioxide, charcoal, or iron. It is used to paint glass antifouling and gives it a red tint.
Why is cuprous oxide a red color?
Red copper is simply a reduced version of the black copper (CuO) oxide. During oxidative fire, the copper will convert to copper oxide (CuO), producing a normal green in the glass or glaze. Reduction firing will keep the Cu2O structure and produce a typical red copper color.

What is cuprous oxide used for?
1. Suitable for pesticides
2. Antibacterial fibres and clothing can be used.
3. Cuprous oxide is suitable for use in agricultural fungicides.
4. Preservatives are suitable for primers on ships to prevent microorganisms.
5. Copper salts are used in the manufacturing of analytical reagents.
6. Use as a catalyst in organic synthesis.
7. Cuprous oxide, a pigment, is used in ceramics as a glaze to produce shades of blue, red, and green.
8. In animal feed, it has been mistakenly added as a nutritional supplement. Copper is not readily absorbed due to low biological activity.
9. Also used in welding copper alloys

Is cuprous oxide dangerous?
It is toxic if swallowed. Skin absorption by the skin may cause harm. May cause skin irritation. It may cause irritation in the eyes.
What is CuO and Cu2O difference?
Cu2O and CuO are obtained using pyrometallurgical techniques to extract copper ore. Copper is the main ingredient in many wood preservatives. It can also be used to color different glazes.

How does a cuprous oxidize form?
Generally, the order of forming an oxide phase from copper by thermal oxidation is Cu-Cu+Cu2O-Cu2O-Cu2O+CuO-CuO. Cu2O is formed at around 200degC. CuO forms between 300degC-1000degC.
How to store cuprous oxid
Cuprous oxide (Cu2O) powder should be stored dry, cool, in a sealed container, and not exposed to air. A heavy pressurization should also be avoided, and the items transported as usual.

Photoelectrochemical Nitrogen Reduction to Ammonia on Copper Oxide and Cuprous Oxide Photocathodes
By reducing the N2 with a photoelectrochemical technique, water can then be used in ambient conditions as a source of hydrogen to produce NH3. The photoelectrochemical N 2 reduce can be significantly reduced in energy by utilizing solar power. The photoelectrochemical process for reducing N2 in this study was carried out using CuO or Cu2O photocathodes. These photocathodes are notoriously poor at water-reduction reactions and their main reaction, therefore, is to compete against N2 reduction. CuO and Cu2O Photocathodes, when tested under simulated sun with isotope marked 15N2 and a 0.1M KOH solution, produced 15NH3 at Faraday efficiencies between 17% and 22%, respectively, under the reversible hydrogen electrode. . These potentials have a much greater positive value than the thermodynamic potential for N2, which shows that the use of electrons photo-excited in CuO and Cu2O can reduce energy requirements for the production of NH3. The use of light excited electrons to reduce N2, moisture and corrosive lighting was carefully studied.

Scientists use ultrafine cupsrous oxide less that 3 nanometers for visible light nitrogen fixation
Zhang Tierui and the Institute of Physics and Chemistry of Chinese Academy of Sciences’ latest research has produced ultrafine cuproous oxide (Cu2O) that is smaller than 3 micrometers and has been able to fix nitrogen using visible light. Recently, related papers were published in the German “Applied Chemistry” magazine.
In this study, using ascorbic acids to perform a topological reduction on a double hydroxide layer containing divalent cupron, the team was able to prepare ultrafine pellets with uniform sizes and lateral measurements less than 3 micrometers. The ultrafine cupro-nickel oxide supported on the substrate can efficiently and reliably realize the visible light-driven N2-NH3 Photocatalytic Reduction (under 400nm photocatalysis the reaction rate is up to 4.10 mmol *GCu2O-1*h-1). The high activity of this catalyst can be attributed to a number of factors, including the long lifetime photogenerated ions trapped in the trap and the presence of sufficient activation site. This work is a guide for the future design ultrafine catalysts used in ammonia synthesis and other applications.

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