Category Chemistry/Nanotechnology

Photoelectrochemical Water-Splitting Efficiency hits 4.5%

Cu2O photocathodes with Band-tail States Assisited Hole Transport for Standalone Solar Water Splitting. Nature Communications 16 January 2020. DOI: 10.1038/s41467-019-13987-5

Solar-to-fuel conversion offers a promising technology to solve energy problems, yet device performance could be limited by undesired sunlight absorption. Researchers show copper thiocyanate can assist hole transport in oxide photoelectrodes and enable a 4.55% solar-to-hydrogen efficiency in tandem devices.

Photoelectrochemical (PEC) water splitting for hydrogen fuel generation has been considered the Holy Grail of electrochemistry. But to achieve it, many scientists believe the materials have to be abundant and low cost.

The most promising oxide photocathodes are cuprous oxide (Cu2O) photoelectrodes...

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ESA opens Oxygen Plant, making Air Out of Moondust

Oxygen and metal from lunar regolith
Oxygen and metal from lunar regolith

ESA’s technical heart has begun to produce oxygen out of simulated moondust. A prototype oxygen plant has been set up in the Materials and Electrical Components Laboratory of the European Space Research and Technology Centre, ESTEC, based in Noordwijk in the Netherlands.

“Having our own facility allows us to focus on oxygen production, measuring it with a mass spectrometer as it is extracted from the regolith simulant,” comments Beth Lomax of the University of Glasgow, whose Ph.D. work is being supported through ESA’s Networking and Partnering Initiative, harnessing advanced academic research for space applications.

“Being able to acquire oxygen from resources found on the Moon would obviously be hugely useful for future lunar settlers, both...

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Towards Sustainability – from a By-product of the Biodiesel industry to a Valuable Chemical

Figure 1. Sustainable biodiesel and hydrogen energy cycles
Sustainable biodiesel and hydrogen energy cycles

One of the main waste by-products of the biodiesel industry, glycerol, can be used as a raw material for the generation of valuable dihydroxyacetone and hydrogen, the latter of which can be used as 100% clean fuel.

Scientists develop a cheap and efficient copper-based catalyst that can be used to convert glycerol, one of the main by-products of the biodiesel industry, into a valuable compound called dihydroxyacetone. In addition, this same process produces hydrogen molecules from water, and these could be used as a clean type of fuel, further highlighting the impact of this research in terms of energy sustainability.

Hydrogen (H2) is a very attractive candidate as a replacement of fossil fuels because it can be produced from water (H...

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‘Superdiamond’ carbon-boron cages can trap and tap into different properties

The bipartite sodalite type clathrate structure, which consists of truncated octahedral “host” cages that trap strontium “guest” atoms, was synthesized under high-pressure and high-temperature conditions using a laser heating technique. Image is courtesy of Tim Strobel.

A long-sought-after class of “superdiamond” carbon-based materials with tunable mechanical and electronic properties was predicted and synthesized by Carnegie’s Li Zhu and Timothy Strobel. Their work is published by Science Advances.

Carbon is the fourth-most-abundant element in the universe and is fundamental to life as we know it. It is unrivaled in its ability to form stable structures, both alone and with other elements.

A material’s properties are determined by how its atoms are bonded and the structural ar...

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