Hydrogen Production from a Methanol–Water Solution Catalyzed by an Anionic Iridium Complex Bearing a Functional Bipyridonate Ligand under Weakly Basic Conditions

1. Prof. Dr. Ken-ichi Fujita^*, 
2. Dr. Ryoko Kawahara, 
3. Takuya Aikawa and
4. Prof. Dr. Ryohei Yamaguchi^*

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Keywords:

• dehydrogenation;
• homogeneous catalysis;
• hydrogen;
• iridium;
• methanol

Abstract

An efficient catalytic system for the production of hydrogen from a methanol–water solution has been developed using a new anionic iridium complex bearing a functional bipyridonate ligand as a catalyst. This system can be operated under mild conditions [weakly basic solution (0.046 mol L⁻¹ NaOH) below 100 °C] without the use of an additional organic solvent. Long-term continuous hydrogen production from a methanol–water solution catalyzed by the anionic iridium complex was also achieved.

最大で84%のH2 yield がでる (TON 160)。