期刊
NANO LETTERS
卷 16, 期 9, 页码 5883-5887出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.6b02740
关键词
Cadmium sulfide; titanium dioxide; Moorella thermoacetica; phthalocyanine; solar-to-chemical production; artificial photosynthesis
类别
资金
- NSF [DGE-1106400, DMR-1507914]
Tandem Z-scheme approaches to solar-to-chemical production afford the ability to independently develop, and optimize reductive photocatalysts for CO2 reduction to multicarbon compounds and Oxidative photocatalysts for O-2 evolution. To connect the two redox processes, molecular redox shuttles, reminiscent of biological electron transfer, offer an additional level-of facile chemical tunability that eliminates the need for solid-state semiconductor junction engineering. In this work, we report a tandem inorganic-biological hybrid system capable of-oxygenic photosynthesis of acetic add from CO2. The photoreductive catalyst consists of the bacterium Moorella thermoacetica self-photosensitized with CdS nanoparticles at, the expense of the thiol amino acid cysteine (Cys) oxidation to the disulfide form cystine (CySS). To regenerate the CySS/Cys redox shuttle, the photooxidative catalyst, TiO2 loaded with cocatalyst phthalocyanine (MnPc), couples water oxidation to CySS reduction. The combined system M. thermoacetica-CdS + TiO2-MnPc demonstrates a potential biomimetic approach to complete oxygenic solar-to-chemical production.
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