American Chemical Society
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Octamolybdate-Based Metal–Organic Framework with Unsaturated Coordinated Metal Center As Electrocatalyst for Generating Hydrogen from Water

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posted on 2013-01-18, 00:00 authored by Yun Gong, Tao Wu, Peng Gang Jiang, Jian Hua Lin, Yong Xi Yang
Two octamolybdate-based MOFs with unsaturated coordinated metal centers formulated as Cu3(Mo8O26)­(H2O)2(OH)2(L1)4 (L1 = 4H-4-amino-1,2,4-triazole) (1) and Ag4(Mo8O26)­(L2)2.5(H2O) (L2 = 3,5-dimethyl-4-amino-4H-1,2,4-triazole) (2) were synthesized and structurally characterized by single-crystal X-ray diffractions. Complex 1 exhibits a 1D chain-like structure. In complex 2, 1D Ag-octamolybdate chains in the ac plane are covalently embedded into the 2D Ag-L2 layer, and the Ag-octamolybdate chains in the bc plane covalently link the 2D layers into 3D architecture. The two complexes both exhibit electrocatalytic activities toward generating H2 from water with lowered overpotentials and enhanced currents, and the Cu complex exhibits better electrocatalytic activity toward generating H2 from water than the Ag complex.