When does bismuth become a semimetal?

Tartaric acid regulated the advanced synthesis of bismuth-based materials with tunable performance towards the electrocatalytic production of hydrogen peroxide

“…10,11 Belonging to the semimetal group, the small overlap between the bottom of the conduction band and the top of the valence band provides interesting physicochemical and catalytic properties to bismuth. [12][13][14][15] For instance, bismuth-based composites gained a signification interest as active materials for the photo-/electrocatalytic synthesis of valuable chemicals (production of hydrogen peroxide, 16 ammonia 17 , formate 18,19 , hydrogen 15,20,21 ), the control of the catalytic selectivity, [22][23][24][25] the sensing, 26 and energy conversion [27][28][29][30] applications.…”