Construction of New Active Sites: Cu Substitution Enabled Surface Frustrated Lewis Pairs over Calcium Hydroxyapatite for CO₂ Hydrogenation.

ABSTRACT: Calcium hydroxyphosphate, Ca₁₀ (PO₄ )₆ (OH)₂ , is commonly known as hydroxyapatite (HAP). The acidic calcium and basic phosphate/hydroxide sites in HAP can be modified via isomorphous substitution of calcium and/or hydroxide ions to enable a cornucopia of catalyzed reactions. Herein, isomorphic substitution of Ca²⁺ ions by Cu²⁺ ions especially at very low levels of exchange created new analogs of molecular surface frustrated Lewis pairs (SFLPs) in Cu_x Ca_10-x (PO₄ )₆ (OH)₂ , thereby boosting its performance metrics in heterogeneous CO₂ photocatalytic hydrogenation. In situ Fourier transform infrared spectroscopy characterization and density functiona

SUBMITTER: Guo J 

PROVIDER: S-EPMC8425883 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature