Ruthenium or osmium complexes and their uses as catalysts for water oxidation
The present invention provides ruthenium or osmium complexes and their uses as a catalyst for catalytic water oxidation. Another aspect of the invention provides an electrode and photo-electrochemical cells for electrolysis of water molecules.
1. A complex having the structure of formula (I):
wherein M is ruthenium (Ru) or osmium (Os), L 1 is a bidentate ligand, L 2 is a tridentate ligand, and L 3 is OH 2 , n is 2 or 1.
2. The complex of claim 1 , wherein L 2 is a tridentate ligand selected from the group consisting of
3. A catalyst comprising a complex according to formula (I):
wherein M is ruthenium (Ru) or osmium (Os), L 1 is a bidentate ligand, L 2 is a tridentate ligand, and L 3 is OH 2 , n is 2 or 1.
4. A photo-electrochemical cell comprising a catalyst comprising a complex according to formula (I):
wherein M is ruthenium (Ru) or osmium (Os), L 1 is a bidentate ligand, L 2 is a tridentate ligand, and L 3 is OH 2 , n is 2 or 1.
5. The photo-electrochemical cell of claim 4 , wherein, in the complex according to formula (I),
L 1 is a bidentate ligand selected from the group consisting of
6. The photo-electrochemical cell of claim 4 , wherein the complex according to formula (I) comprises the structure {Ru(Mebimpy)[4,4′-((HO) 2 OPCH 2 ) 2 bpy](OH 2 )} 2+ .
7. The photo-electrochemical cell of claim 4 , wherein the complex according to formula (I) comprises a complex of Formula A or B:
wherein, for Formula A and B, the ligand
is independently selected from the group consisting of