CO2 reduction to commodity chemicals and fuels holds great promise to alleviate the global warming. The realization typically requires earth-abundant catalysts and inexpensive driving force. In this paper, Jiuli and coauthors reported a Cu2+-substituted hydroxyapatite (Ca10(PO4)6(OH)2) mineral photocatalyst achieving peak CO2-to-CO performance of 215 μmol per gram catalyst per hour without CH4 byproduct. The activity originates from novel active sites of surface frustrated Lewis pairs—the proximal Lewis acidic Cu2+ and Lewis basic OH-, which selectively produce CO via a formate intermediate. See full story at Advanced Science.
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