Improving the Hydrogenation Performance of Nano-Catalysts by Constructing a Cavity-Constrained Fluidized System.

Nano-catalysts demonstrate exceptional performance in heterogeneous reactions, yet their potential is often underutilized due to a lack of attention to engineering design. In this study, an innovative encapsulated structure is presented for nano-catalysts and a corresponding catalytic system. Using an oil-in-water droplet strategy, millimeter-sized hollow spherical alumina (AlO-HS) is fabricated with an average diameter of ≈3 mm and a hollow void size of ≈1 mm.

Four 3D Co(ii) MOFs based on 2,4,6-tris(4-pyridyl)-1,3,5-triazine and polycarboxylic acid ligands and their derivatives as efficient electrocatalysts for oxygen reduction reaction.

Different aromatic polycarboxylic acids are employed as auxiliary ligands to give rise to structural diversities in Co(ii)-tpt (tpt = 2,4,6-tris(4-pyridyl)-1,3,5-triazine) frameworks. By introducing various secondary aromatic polycarboxylate anions, namely, biphenyl-3,4',5-tricarboxylic acid (Hbpt), 1,3,5-benzenetricarboxylic acid (Hbtc) and 2,6-dimethyl pyridine-3,5-dicarboxylic acid (Hdmdcpy) into the Co(ii)-tpt system (tpt = 2,4,6-tris(4-pyridyl)-1,3,5-triazine), four new complexes [Co(tpt)(Hbpt)]·0.5DMDP (1) (DMDP = N,N' = dimethylpropyleneurea), [Co(btc)(tpt)(HO)]·3HO (2), [Co(btc)(tpt)Cl]·DMDP·1.