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Abstract Highly efficient and inexpensive electrochemical splitting of water into hydrogen and oxygen gas constitutes the most critical capability needed for the development of a future hydrogen economy based on renewable energy. This work considers the prospects of developing a commercially-feasible water electrolyser with 95-100% energy efficiency (relative to the Higher Heating Value, HHV, of hydrogen) at the cells in the near future. We show that at least a 5-10% improvement in energy efficiency over the best, existing commercial water electrolysers would be needed. The elimination or mit...

Sponsored Content provided by Chris Jones - Managing Partner, Green Dot Heating & Air Once the weather turns colder, nothing sounds more appealing or inviting than the warm ambiance created by a fireplace. The images associated with fireplaces — stockings hung over a mantel, friends gathered around with cups of hot cocoa — are so deeply embedded in our culture that it is hard to imagine a high-end home without one. For those who worry about the harmful chemicals and volatile organic compounds emitted by wood burning fireplaces, or spend time thinking about efficiency metrics, the conver...