Solid surface frustrated Lewis pair constructed on layered AlOOH for hydrogenation reaction
Shulin Liu, Minghua Dong, Yuxuan Wu, Sen Luan, Yu Xin, Juan Du, Shaopeng Li, Huizhen Liu, Buxing Han
Abstract
Abstract Designing heterogeneous solid surface frustrated Lewis pair (ssFLP) catalyst for hydrogenation is a new challenge in catalysis and no research has been reported on the construction of ssFLP on boehmite (AlOOH) surfaces up to now as far as we know. Herein, AlOOH with a layer structure is prepared and it is found that the Lewis basic O Hv site (one H removed from OH) and an adjacent Lewis acidic unsaturated Al site (Al 3+ unsatur .) proximal to a surface OH v (OH vacancy) on AlOOH layers could form the ssFLP. The layered structure of AlOOH and its abundant OH defects over the surface result in a high concentration of O Hv /Al 3+ unsatur . FLPs, which are conducive to highly efficient hydrogen activation for hydrogenation of olefins and alkynes with low H-H bond dissociates activation energy of 0.16 eV under mild conditions (T = 80°C and P(H 2 ) = 2.0 MPa). This work develops a new kind of hydrogenation catalyst and provides a new perspective for creating solid surface FLP.