“…[40,97,98] Here the role of US should be more or less similar to that of high-speed stirrers. [16] The mechanical effect originates from the asymmetric collapse of cavitation bubbles near the liquid-solid phase boundary disrupting the interface and impelling jets of liquid into the catalyst surface (liquid jet impingement), [21,99] leading to the grinding of solid catalysts to become smaller particles, revealing new, previously unexposed surface and therefore, resulting in a dramatic increase in surface area, dispersion and BET surface area. [100] Increased adsorption/desorption rates of either liquid species at the catalyst surface or gas dissolution in the liquid phase may also enhance/alter reaction outcome.…”