[{β-SiNi 2 W 10 O 36 (OH) 2 (H 2 O)} 4 ] 24− : a new robust visible light-driven water oxidation catalyst based on nickel-containing polyoxometalate

[{β-SiNi2W10O36(OH)2(H2O)}2]12− (1)] was reported as an efficient, robust visible light-driven water oxidation catalyst for the first time. Of the reported polyoxometalates containing nickel, 1 shows the best photocatalytic O2 evolution activity with a TON of 335 and TOF of 1.7 s−1 [corrected].