Abstract
Photoinduced Hydrogen Fuel Production and Water Decontamination Technologies. Orthogonal Strategies with a Parallel Future?
Highlights
The photochemical splitting of water into H2 and O2 has fascinated photochemists since the OPEC oil embargo in 1973, yet progress has been slow largely because of the challenge of oxidizing water, an energetically uphill reaction.[1]
Whereas alcohols have been the preferred choice for sacrificial donors,[6] the reality is that numerous molecules that can be oxidized can fulfill this role, including many of the contaminants that are present in polluted waters (Figure 2)
Photochemical H2 generation and water treatment fit well the useful concepts of positive and negative photocatalysis developed by Corma and Garcia;[5] these concepts separate catalysis aimed at the production of valuable chemicals from catalysis aimed at water remediation
Summary
The photochemical splitting of water into H2 and O2 has fascinated photochemists since the OPEC oil embargo in 1973, yet progress has been slow largely because of the challenge of oxidizing water, an energetically uphill reaction (eqn 1).[1]. While the intimate understanding of the water-splitting process may require pure water in the absence of any sacrificial donors, the same may not be true for the practical generation of Whereas alcohols have been the preferred choice for sacrificial donors,[6] the reality is that numerous molecules that can be oxidized can fulfill this role, including many of the contaminants that are present in polluted waters (Figure 2).
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