“…But mild conditions usually require noble-metal catalysts for O 2 activation. 15,16 Hayashi et al reported the liquid phase oxidation of lactic acid over a Te/Pd/C catalyst, giving an 80% lactic acid conversion and a 50% pyruvic acid yield at 90 °C. 17 Recently, Yin et al compared the activity of methyl lactate and the selectivity to methyl pyruvate on noble-metal catalysts, such as Pt/AC, Pd/AC, Rh/AC, Au/AC, and Ru/AC, under the same reaction conditions.…”