Photoelectrochemical CO2 Activation toward Artificial Leaves

They must have a high energy density both by volume and by weight. 

They must be easy to store without need of high pressure at room temperature. 

They must be of low toxicity and safe in handling and show limited risks in their distributed (nontechnical) use. 

They must show good integration into the actual energy infrastructure without need of new dedicated equipment. 

They must have a low impact on the environment in both their production and use. 

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