Energy & Green Tech

Toyota eyes Olympic platform to boost hydrogen tech

Toyota showcases its next-generation hydrogen-powered Mirai model at Wednesday's Tokyo Motor Show, but with the technology still lagging behind electric, the Japanese firm is hoping for an Olympic boost.

Energy & Green Tech

A new water-splitting technique to generate clean hydrogen

Electrolytic hydrogen production entails the generation of hydrogen from water using electrical power, which should ideally come from renewable power sources such as sunlight and wind. Although this method of producing hydrogen ...

Energy & Green Tech

Emissions-free transport speeding up in Europe

Hydrogen-powered cars are seen as a potential solution to the pollution caused by gasoline and diesel engines, but the mass roll-out of fuel cell electric vehicles (FCEVs) hasn't yet materialized. As noted in a report by ...

Energy & Green Tech

Algae and bacteria team up to increase hydrogen production

In line with the fight against climate change and the search for a sustainable future, there is the idea of a future society based on hydrogen used as a fuel. This biofuel of the future could be what cars and engines run ...

Energy & Green Tech

Researchers design roadmap for hydrogen supply network

Transportation is the largest source of greenhouse gas emissions in British Columbia. Researchers at the University of British Columbia have developed a hydrogen supply chain model that can enable the adoption of zero-emission, ...

Energy & Green Tech

France climbs aboard hydrogen train revolution

France is joining the hydrogen train revolution, the head of state rail operator SNCF said Thursday, announcing an order for 15 emissions-free regional trains to replace polluting diesel models.

Energy & Green Tech

Pollution-free hydrogen: green energy breakthrough?

Scientists said Tuesday they have developed a way of extracting hydrogen from oil without releasing greenhouse gases—a breakthrough they hailed as a "silver bullet" for cleaner energy and the climate.

Energy & Green Tech

Australia should learn from global hydrogen focus, report says

Countries around the world are now making rapid advances in hydrogen energy technologies and strategy—and Australia has much to learn from their experience, according to the authors of a new report by the University of ...


Collaborating to better understand metal degradation

Southwest Research Institute and The University of Texas at San Antonio are working together to understand the susceptibility of additively manufactured materials to hydrogen embrittlement, a common problem that can lead ...

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Hydrogen (pronounced /ˈhaɪdrədʒən/) is the chemical element with atomic number 1. It is represented by the symbol H. At standard temperature and pressure, hydrogen is a colorless, odorless, nonmetallic, tasteless, highly flammable diatomic gas with the molecular formula H2. With an atomic weight of 1.00794 u, hydrogen is the lightest element.

Hydrogen is the most abundant chemical element, constituting roughly 75% of the universe's elemental mass. Stars in the main sequence are mainly composed of hydrogen in its plasma state. Elemental hydrogen is relatively rare on Earth. Industrial production is from hydrocarbons such as methane with most being used "captively" at the production site. The two largest uses are in fossil fuel processing (e.g., hydrocracking) and ammonia production mostly for the fertilizer market. Hydrogen may be produced from water by electrolysis at substantially greater cost than production from natural gas.

The most common isotope of hydrogen is protium (name rarely used, symbol H) with a single proton and no neutrons. In ionic compounds it can take a negative charge (an anion known as a hydride and written as H−), or as a positively-charged species H+. The latter cation is written as though composed of a bare proton, but in reality, hydrogen cations in ionic compounds always occur as more complex species. Hydrogen forms compounds with most elements and is present in water and most organic compounds. It plays a particularly important role in acid-base chemistry with many reactions exchanging protons between soluble molecules. As the only neutral atom with an analytic solution to the Schrödinger equation, the study of the energetics and bonding of the hydrogen atom played a key role in the development of quantum mechanics.

Hydrogen is important in metallurgy as it can embrittle many metals, complicating the design of pipelines and storage tanks. Hydrogen is highly soluble in many rare earth and transition metals and is soluble in both nanocrystalline and amorphous metals. Hydrogen solubility in metals is influenced by local distortions or impurities in the crystal lattice.

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