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Earth Sciences
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200
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Earth Sciences
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Materials Science
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A research team led by Prof. Chen Changlun from the Hefei Institutes of Physical Science of the Chinese Academy of Sciences, together with collaborators, developed advanced cobalt-doped nickel hydroxide bipolar electrodes ...
Analytical Chemistry
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Emissions of nitrous oxide—a greenhouse gas more potent than carbon dioxide or methane—continued unabated between 1980 and 2020, a year when more than 10-million metric tons were released into the atmosphere primarily ...
Earth Sciences
Jun 11, 2024
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152
Air pollution is a severe risk to human health and the environment, particularly from fine particulate matter (PM2.5) and ozone (O3). Despite global efforts, many cities continue to face significant exposure risks from these ...
Environment
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76
Phototherapy is a safe and effective method for tumor treatment, including photothermal therapy (PTT) and photodynamic therapy (PDT). PTT refers to the use of laser to activate photothermal conversion agents and use high ...
Bio & Medicine
Jun 14, 2024
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24
Global emissions of nitrous oxide—a potent greenhouse gas—are outpacing expectations and putting climate change goals in peril, a major study published on Wednesday found.
Environment
Jun 15, 2024
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39
Layers of carbon atoms in a honeycomb array are a true supermaterial: their unusually high conductivity and favorable mechanical properties could further the development of bendable electronics, new batteries, and innovative ...
Nanomaterials
Jun 14, 2024
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1
Fingerprint detection is one of the most important techniques in forensic investigation. When fingerprints are dusted with a carbon-based powder, the material will adhere to the moisture and grease left behind by the unique ...
Nanomaterials
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102
Redox (shorthand for reduction-oxidation reaction) describes all chemical reactions in which atoms have their oxidation number (oxidation state) changed. This can be either a simple redox process such as the oxidation of carbon to yield carbon dioxide or the reduction of carbon by hydrogen to yield methane (CH4), or it can be a complex process such as the oxidation of sugar in the human body through a series of very complex electron transfer processes.
The term redox comes from the two concepts of reduction and oxidation. It can be explained in simple terms:
Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation number — the actual transfer of electrons may never occur. Thus, oxidation is better defined as an increase in oxidation number, and reduction as a decrease in oxidation number. In practice, the transfer of electrons will always cause a change in oxidation number, but there are many reactions that are classed as "redox" even though no electron transfer occurs (such as those involving covalent bonds).
Non-redox reactions, which do not involve changes in formal charge, are known as metathesis reactions.
This text uses material from Wikipedia, licensed under CC BY-SA
