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Water splitting

Catalyst or spectator?

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The deposition of cobalt-phosphate onto photocatalytic haematite improves its ability to split water and thus create clean hydrogen fuel. The source of this improvement is, however, not yet understood, and now two separate studies suggest different roles for the deposited cobalt-phosphate.

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Figure 1: Results from Barroso, Durrant and colleagues indicate a non-catalytic role for Co-Pi.
Figure 2: Results from Hamman and colleagues suggest that Co-Pi improves PEC performance by reducing surface electron–hole recombination.

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  1. Daniel R. Gamelin is in the Department of Chemistry at the University of Washington, Seattle, Washington 98195-1700, USA,

    Daniel R. Gamelin

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  1. Daniel R. Gamelin
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Correspondence to Daniel R. Gamelin.

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Gamelin, D. Catalyst or spectator?. Nature Chem 4, 965–967 (2012). https://doi.org/10.1038/nchem.1514

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