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    New Synthesis Route for Alternative Catalysts of Noble Metals

    July 30, 2017, Categories  Uncategorized

    Synthesis schemes of (a) conventional carbonaceous catalysts and (b) this work for ordered carbonaceous frameworks. Credit: Copyright: Hirotomo Nishihara

    Synthesis schemes of (a) conventional carbonaceous catalysts and (b) this work for ordered carbonaceous frameworks. Credit: Copyright: Hirotomo Nishihara

    Researchers have developed a new synthesis route for alternative catalysts of noble metals for versatile chemical reactions that could help address environmental concerns. Noble metals such as platinum are useful as catalysts for versatile chemical reactions including fuel cell vehicles and reduction of CO2 emission. However, they are too costly to be used for these purposes.

    As inexpensive alternatives, organic-based catalysts and carbonaceous catalysts were explored, but were ultimately found to be impractical...

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    New Catalyst for Hydrogen Production

    July 27, 2016, Categories  Chemistry/Nanotechnology, Physics, Technology/Electronics

    Structural comparison of penlandite with hydrogenases.

    Structural comparison of penlandite with hydrogenases. (a) Crystal structure of Ni4.5Fe4.5S8. The nickel and iron sites (brown) share the same positions within the crystal and are bridged by sulfur (yellow). (b) Active site of the [FeNi]-hydrogenase (PDB: 4U9H) as well as (c) [FeFe]-hydrogenase (X=NH, PDB: 1HFE).

    Mineral pentlandite works just as efficient as expensive platinum electrodes commonly used today. In contrast to platinum, pentlandite is affordable and found frequently on Earth. In addition to platinum, there are numerous other substances that can catalyse the reaction of water to hydrogen and oxygen and do not contain any precious metals. Among such compounds are the so-called metal chalcogenides...

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    Discovery of Efficient Catalyst eases way to Hydrogen Economy

    September 15, 2015, Categories  Physics, Technology/Electronics

    Bathed in simulated sunlight, this photoelectrolysis cell in the lab of Song Jin, a professor of chemistry at the University of Wisconsin-Madison, splits water into hydrogen and oxygen using a catalyst made of the abundant elements cobalt, phosphorus and sulfur. Credit: David Tenenbaum/University of Wisconsin-Madison

    Bathed in simulated sunlight, this photoelectrolysis cell in the lab of Song Jin, a professor of chemistry at the University of Wisconsin-Madison, splits water into hydrogen and oxygen using a catalyst made of the abundant elements cobalt, phosphorus and sulfur. Credit: David Tenenbaum/University of Wisconsin-Madison

    Jin’s research team reports a hydrogen-making catalyst containing phosphorus and sulfur – both common elements – and cobalt, a metal that is 1,000 times cheaper than platinum. This is in answer to the major roadblock to “hydrogen economy”, ie the need for platinum or other expensive noble metals in the water-splitting devices. Noble metals are normally used as they resist oxidation and include many of the precious metals, such as platinum, palladium, iridium and gold.

    Catalyst...

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