Isolated Ni2+ Cations as the Active Centers for 1‑Butene Dimerization in Zeolites - Laura Löbbert; Abelina Ellert; Mengjie Zhou; Ricardo Bermejo-Deval; Noelia Barrabes; Rachit Khare; Maricruz Sanchez-Sanchez; Johannes A. Lercher (JACS Au)