There is a growing need for grid-scale storage technology to mitigate the intermittency of renewables and enable the transition towards a decarbonized energy system. Hydrogen as an energy carrier could offer a climate-friendly solution to this. It can be produced from renewable sources, is able to be stored for long periods of time, and has applications across the energy supply chain; offering a potential replacement for fossil fuels within the transport and heat sectors.

Globally, the predominant method for hydrogen production is steam reforming of natural gas or other hydrocarbons (SMR), which would require the use of carbon capture and storage (CCS) technologies to be ‘carbon neutral’. Another production method, which is currently small-scale in the

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