Table 8. Catalytic Testing Results upon Reuse, Metal Leaching and XPS-Derived Au/Pd of PAA-Stabilized 1%AuPd/C Catalyst Prepared with or without Acid and Corresponding Metal Leaching (Au, Pd)^a.

					leaching (%)
catalyst	use (−)	actual metal loading (wt %)	productivityb (molH2O2 mmol–1Metal h–1)	degradationc (molH2O2 mmol–1Metal h–1)	Au	Pd	Au/Pd (−)
1%AuPd/GNP	1	0.48	1.9	1.7	0	0.06	0.2
	2		0.1	0.3			0.2
1%AuPd/GNP-H+	1	1.00	2.8	6.4	0	0.04	0.8
	2		0.9	3.1			0.8
1%AuPd/KBB	1	0.21	1.2	3.3	0	0.12	1.1
	2		0.1	0.1			N/Ad
1%AuPd/KBB-H+	1	1.00	1.9	7.3	0	0.10	1.5
	2		1.4	2.8			1.3

^aMetal leaching calculations are based on the actual metal loading of the catalyst.

^bH₂O₂ direct synthesis reaction conditions: catalyst (0.01 g), H₂O (2.9 g), MeOH (5.6 g), 5%H₂/CO₂ (2.9 MPa), 25%O₂/CO₂ (1.2 MPa), 0.5 h, 2 °C, 1200 rpm.

^cH₂O₂ degradation reaction conditions: catalyst (0.01 g), H₂O₂ (50 wt % 0.68 g), H₂O (2.22 g), MeOH (5.6 g), 5% H₂/CO₂ (2.9 MPa), 0.5 h, 2 °C, 1200 rpm.

^dNo Pd detected.