Some fuel cells are powered by hydrogen. scientists are looking into the decomposition of water (h2o) to make hydrogen fuel with the of the sun’s energy. what challenge do scientists face with this task?

The answer is A : Decomposing water requires a high activation energy. This is why the fuel cells require a highly efficient photo-absorbing material such as indium phosphide and silicon for the photoelectrochemical (PEC) process. They ar able to efficiently absorb energy from the sun to enable the splitting of water-based electrolyte to one of its components; hydrogen. However, these semiconductor photo-absorbers are unstable in the electrolyte as they are easily oxidized and degraded during the electrolysis process.