PVC-NHC-Pd(0): An efficient and reusable heterogeneous catalyst for highly cis-selective semihydrogenation of alkynes using formic acid as hydrogen source

A ligand-free in situ-generated cobalt nanoparticle catalyst for (Z)-selective transfer semihydrogenation of alkynes

“…Thus, people are more inclined to choose the method of transfer hydrogenation. So far, the hydrogen sources used for transfer hydrogenation include borane, 12,13 silane, [14][15][16][17] acids, [18][19][20][21][22] alcohols, [23][24][25][26] water, [27][28][29][30] etc. NH 3 ÁBH 3 , as a new type of energy material, has high hydrogen storage mass fraction (19.6 wt%) and bulk hydrogen storage density (0.145 kg H 2 L À1 ).…”

Selective photosynthesis of Z‐olefins through crystalline metal–organic cage‐initiated expeditious cascade reactions

“…[15][16][17][18] To ensure the safety of the reaction, investment in equipment related to hydrogen transportation and use is essential, but this will significantly increase the cost of the reaction. 19 To solve this problem, researchers have attempted to use some hydrogen-rich chemicals (e.g., formic acid 20,21 or ammonia borane 22,23 ) as the hydrogen source, in situ catalytic release of hydrogen or hydrogen radicals, and then alkyne hydrogenation to reduce the potential hazards of hydrogen usage. However, these chemical feedstocks still have low toxicity and corrosiveness, and the decomposition process is energy-intensive (e.g., heating) and yields undesirable products.…”

“…In addition to the above considerations, a common source of reactant hydrogen for the operation of alkyne semi‐hydrogenation is high‐pressure hydrogen 15–18 . To ensure the safety of the reaction, investment in equipment related to hydrogen transportation and use is essential, but this will significantly increase the cost of the reaction 19 . To solve this problem, researchers have attempted to use some hydrogen‐rich chemicals (e.g., formic acid 20,21 or ammonia borane 22,23 ) as the hydrogen source, in situ catalytic release of hydrogen or hydrogen radicals, and then alkyne hydrogenation to reduce the potential hazards of hydrogen usage.…”