Protons left behind by the oxygen migrated to a second electrode made of platinum and formed into hydrogen.

ECONOMIST: Looking to leaves for a way to store solar power after sunset

A123 has developed a battery that uses a doped lithium nanophosphate electrode (cathode) that eliminates combustible oxygen from the system.

FORBES: Jump Start

The inquest heard that midwives did not regularly check her labour progress and after bringing a foetal scalp electrode to monitor the baby they found he had already been born and starved of oxygen.

BBC: Kamaljeet Singh and son Maninder