A team of Scottish-based scientists has developed a new technique for creating hydrogen fuel. Working at Heriot-Watt University, they’ve created a system that uses sunlight to create hydrogen more cheaply and efficiently than before. Hydrogen is the lightest element in the Universe. A gas at room temperature, it burns with oxygen to give off heat and water vapour. (In air there are also small amounts of nitrogen oxide.) Unlike carbon-based fossil fuels, there is no carbon dioxide (CO2) to add to the planet’s climate concerns. It is that feature which has made it a prime candidate to be a major part of our future energy supplies. But before what has already been dubbed the “hydrogen economy” can fully develop, it first has to be economical. Hydrogen can be produced using fossil fuels, which adds to CO2 emissions. Another, cleaner method appears simple: harvest energy from the sun using solar cells, then pass the resulting electricity through water. The water splits cleanly into hydrogen and oxygen. It’s called PEC – photoelectrochemical water splitting.
BBC 26th March 2018 read more »