Table 1. The CO resistance of Pt-based catalysts.

Conditions: 0.1 mmol of substrate, 3 ml of DMF, and 2 mg of catalyst. Gas: H₂ or 0.1%-CO/H₂. Reaction time: 1.5 hours (entries 1 to 6, 9 to 16, and 18 to 23) and 2 hours (entries 7, 8, and 17).

Entry	Catalyst	Product in Fig. 5	Gas	Con./Sel.%
1	Pt/C	2a	H2	99.9/69.5
2			H2/CO	0/0
3	Twinned Pt2Mo/C	2a	H2	99.9/95.7
4			H2/CO	99.9/99.9
5		2b	H2	99.9/96.4
6			H2/CO	99.9/96.7
7		2c	H2	99.9/99.9
8			H2/CO	99.9/99.9
9		2d	H2	99.9/99.9
10			H2/CO	99.9/99.9
11		2e	H2	99.9/99.9
12			H2/CO	99.9/99.9
13		2f	H2	99.9/99.9
14			H2/CO	99.9/99.9
15	Twinned Pt2W/C	2a	H2/CO	99.9/99.9
16		2b	H2/CO	99.9/94.4
17		2c	H2/CO	95.7/99.9
18		2d	H2/CO	99.9/99.9
19		2e	H2/CO	99.9/99.9
20		2f	H2/CO	99.9/99.9
21	Untwinned Pt2Mo/C	2a	H2	99.9/50.4
22			H2/CO	5.2/78.2
23	Untwinned Pt2Mo/Al2O3	2a	H2/CO	68.2/18.3
24	Untwinned Pt2Mo/MgO		H2/CO	17.8/17.6