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Biofuel production by sunlight using the biohybrid system Shewanella oneidensis-CdS
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"Rising energy demand due to a growing population while reducing global warming is one of the biggest challenges for humankind today. Hydrogen, with excellent energy properties and no burning emissions, poses the ability to solve both. However, the production of hydrogen still relies on fossil fuels which in turn makes it not sustainable. One innovative and sustainable approach under study is the use of biohybrids constructed with non-photosynthetic bacteria and the self-produced semiconductor for the production of hydrogen from sunlight. In this study a biohybrid using the electroactive bacterium Shewanella oneidensis MR-1 coupled to self-precipitated cadmium sulphide nanoparticles was constructed for hydrogen production using visible light. The electron transfer pathway involved in this bioprocess was investigated for the first time by using knock-out strains of the proteins involved in the extracellular electron transfer. These mutant strains were used to construct the biohybrids and comparing their hydrogen production to the one constructed with wild type strain, the key proteins involved in the electron uptake for hydrogen production via nanoparticles were identified.(...)"
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Shewanella oneidensis hydrogen photoproduction biohybrid electron transfer multiheme cytochromes