Metal–ligand core–shell nanocomposite catalysts for the selective semihydrogenation of alkynes

~4%

~95%

~94%

~93%

~3%

~3%

~99%

~95%

~3%

~2%

~1%

~97%

~99%

~98%

~2%

~2%

~96%

~4%

~2%

~5%

~96%