Mechanism driven design of trimer Ni₁Sb₂ site delivering superior hydrogenation selectivity to ethylene.

ABSTRACT: Mechanism driven catalyst design with atomically uniform ensemble sites is an important yet challenging issue in heterogeneous catalysis associated with breaking the activity-selectivity trade-off. Herein, a trimer Ni₁Sb₂ site in NiSb intermetallic featuring superior selectivity is elaborated for acetylene semi-hydrogenation via a theoretical guidance with a precise synthesis strategy. The trimer Ni₁Sb₂ site in NiSb intermetallic is predicted to endow acetylene reactant with an adequately but not excessively strong σ-adsorption mode while ethylene product with a weak π-adsorption one, where such compromise delivers higher ethylene formation rate. An in-situ trapping of molten Sb by Ni strategy is developed to realize the construction of Ni_1<

SUBMITTER: Ge X 

PROVIDER: S-EPMC9492709 | biostudies-literature | 2022 Sep

REPOSITORIES: biostudies-literature