Extended Data Fig. 9: Photooxidation of GLY for selective HPA synthesis under various O2 pressure.

a, Production rate under the reaction condition of 0.2 M GLY, 298 K, 2 atm O2 (left) and 1 atm O2 (right). c, Production rate under the reaction condition of 0.5 M GLY, 298 K, 5 atm O2 (left) and 1 atm O2 (right). e, Production rate under the reaction condition of 0.1 M GLY, 298 K, 5 atm O2 (left) and 1 atm O2 (right). b, d, f, HPA selectivity and GLY conversion under the reaction condition of 0.2 M GLY at 298 K in 2 atm O2 (left) and 1 atm O2 (right) (b), 0.5 M GLY at 298 K in 5 atm O2 (left) and 1 atm O2 (right) (d) and 0.1 M GLY at 298 K in 5 atm O2 (left) and 1 atm O2 (right) (f).