Grouping effect of single Ni-N4 sites in N-doped carbons boosts hydrogen transfer coupling of alcohols and amines.

Grouping effect of single Ni-N4 sites in N-doped carbons boosts hydrogen transfer coupling of alcohols and amines. Angew Chem Int Ed Engl. 2018 Sep 25;: Authors: Su H, Gao P, Wang MY, Zhai GY, Zhang JJ, Zhao TJ, Su J, Antonietti M, Li XH, Chen JS Abstract As a new type of heterogeneous catalyst with "homogeneous-like" activity, single-site transition metal materials were usually treated as integrated but separated active centers. Herein, we report a novel grouping effect of single Ni-N4 sites in N-doped carbon (Ni/NC), where effective ligand-stabilized polycondensation method endows Ni/NC nanocatalysts with a high content of single-site Ni up to 9.5 wt. %. The enhanced electron density at each single Ni-N4 site promotes a highly efficient hydrogen transfer, here exemplified with the coupling of benzyl alcohol and aniline into N-benzyl aniline with a turnover frequency (TOF) value of 7.0 mol N-benzyl aniline mol-1 metal h-1, outpacing that of stable non-noble-metal-based catalysts in the literature by a factor of 2. PMID: 30251296 [PubMed - as supplied by publisher]
Source: Angewandte Chemie - Category: Chemistry Authors: Tags: Angew Chem Int Ed Engl Source Type: research