4 years ago

Cell-Free Synthetic Biology Chassis for Nanocatalytic Photon-to-Hydrogen Conversion

Cell-Free Synthetic Biology Chassis for Nanocatalytic Photon-to-Hydrogen Conversion
Elena A. Rozhkova, Angela Y. Chang, Peng Wang, Valentyn Novosad, Richard D. Schaller, Vladimir V. Chupin
We report on an entirely man-made nano-bio architecture fabricated through noncovalent assembly of a cell-free expressed transmembrane proton pump and TiO2 semiconductor nanoparticles as an efficient nanophotocatalyst for H2 evolution. The system produces hydrogen at a turnover of about 240 μmol of H2 (μmol protein)−1 h–1 and 17.74 mmol of H2 (μmol protein)−1 h–1 under monochromatic green and white light, respectively, at ambient conditions, in water at neutral pH and room temperature, with methanol as a sacrificial electron donor. Robustness and flexibility of this approach allow for systemic manipulation at the nanoparticle–bio interface toward directed evolution of energy transformation materials and artificial systems.

Publisher URL: http://dx.doi.org/10.1021/acsnano.7b01142

DOI: 10.1021/acsnano.7b01142

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