Table 2. Requirements of Homogeneous H₂O₂ Synthesis.

Requirement		Previous worka	This work
Safe	H2 (%)	95	95
	O2 (%)	5	5
	Temperature (°C)	40	23
	Solvent	Water	Water
One-pot	Reaction vessel	High-pressure glass cylinder	High-pressure glass cylinder
Direct synthesis	H2 (MPa)	0.76	0.475–1.8
	O2 (MPa)	0.04	0.025–0.1
	TON	3.8	910
	Catalyst (mmol %)	0.11	0.22
	Reactivity of RhI species to O2	RhI species hardly reacts with O2	RhI species reacts with O2

^aSee ref (19).