Inorganic Chemistry
Inorganic Chemistry
5 years ago

Light-Driven Hydrogen Generation from Microemulsions Using Metallosurfactant Catalysts and Oxalic Acid

Light-Driven Hydrogen Generation from Microemulsions Using Metallosurfactant Catalysts and Oxalic Acid
Danielle N. Chirdon, Nikita Budwal, Husain N. Kagalwala, Stefan Bernhard, Isaac N. Mills
Photocatalytic hydrogen evolution from a unique microemulsion-based system is investigated. Upon illumination, a metallosurfactant photosensitizer [Ir(ppy)2(dhpdbpy)]Cl is oxidatively quenched by an amphiphilic proton reducing catalyst, [Rh(dhpdbpy)2Cl2]Cl. Presence of 1-octylamine leads to an organic extraction of the sacrificial reductant, oxalic acid. This promotes a close interaction between the constituents, leading to high catalytic activity under optimized conditions (iridium and rhodium TOF ≥ 200 h−1). Mechanistic elucidations were obtained through Raman, luminescence quenching, and electrochemical analysis.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b00463

DOI: 10.1021/acs.inorgchem.7b00463

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