Water splitting-biosynthetic system with CO2 reduction efficiencies exceeding photosynthesis
Water splitting-biosynthetic system with CO2 reduction efficiencies exceeding photosynthesis
复制标题
DOI：
10.1126/science.aaf5039
复制
发表时间：
2016-06-03
期刊：
影响因子：
56.9
通讯作者：
Nocera, Daniel G.
中科院分区：
文献类型：
--
作者：
Liu, Chong;Colon, Brendan C.;Nocera, Daniel G.
人工光合系统可以储存太阳能，并通过化学方式减少二氧化碳。我们开发了一种混合水分解-生物合成系统，该系统基于地球上生物相容性丰富的无机催化剂系统，在低驱动电压下将水分解成氢分子和氧分子（H-2和O-2）。当与这些催化剂接触生长时，富营养菌消耗产生的H-2，在O-2存在的低二氧化碳浓度下合成生物质和燃料或化学产品。这种可扩展的系统在生产细菌生物质和液体燃料醇时，二氧化碳减排效率接近50%，每千瓦时发电可洗涤180克二氧化碳。将这种混合装置与现有的光伏系统相结合，将产生大约10%的二氧化碳减排能源效率，超过天然光合系统。
Artificial photosynthetic systems can store solar energy and chemically reduce CO2. We developed a hybrid water splitting-biosynthetic system based on a biocompatible Earth-abundant inorganic catalyst system to split water into molecular hydrogen and oxygen (H-2 and O-2) at low driving voltages. When grown in contact with these catalysts, Ralstonia eutropha consumed the produced H-2 to synthesize biomass and fuels or chemical products from low CO2 concentration in the presence of O-2. This scalable system has a CO2 reduction energy efficiency of similar to 50% when producing bacterial biomass and liquid fusel alcohols, scrubbing 180 grams of CO2 per kilowatt-hour of electricity. Coupling this hybrid device to existing photovoltaic systems would yield a CO2 reduction energy efficiency of similar to 10%, exceeding that of natural photosynthetic systems.