Low-cost visible-light photosynthesis of water and adsorbed carbon dioxide into long-chain hydrocarbons
Low-cost visible-light photosynthesis of water and adsorbed carbon dioxide into long-chain hydrocarbons
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DOI：
10.1016/j.cplett.2019.136985
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发表时间：
2020-01-01
影响因子：
2.8
通讯作者：
Mazur, Eric
中科院分区：
文献类型：
--
作者：
Wang, Cong;Ren, Haizhou;Mazur, Eric
我们报道了一种稳定且低成本的钴/钴氧化物（Co/CoO）纳米结构光催化剂，用于将二氧化碳和水合成为从丙烷（C3 H8）到十五烷（C15 H32）的不同烃，平均太阳能到化学能转换效率> 0.1%。碳氢化合物的分布遵循泊松分布。使用C-13标记的CO2的实验和理论计算揭示了强的CO2吸附在纳米结构的Co/CoO催化剂表面上。可见光的光子能量大到足以激发吸附的CO2分子进入不稳定状态，与解离的H2O反应形成长链烃。由于CO2可以从空气中直接吸附到CoO上，因此该催化剂不需要纯化的CO2，从而能够利用太阳能和从环境空气或未纯化的CO2源吸附的CO2低成本生产柴油范围的烃。
We report a robust and low-cost cobalt/cobalt oxide (Co/CoO) nanostructured photo-catalyst for the synthesis of carbon dioxide and water into different hydrocarbons ranging from propane (C3H8) to pentadecane (C15H32) at an average solar-to-chemical energy conversion efficiency > 0.1%. The distribution of hydrocarbons follows a Poisson distribution. Experiments using C-13-labeled CO2 and theoretical calculations reveal strong CO2 adsorption on the nanostructured Co/CoO surface of the catalyst. The photon energy of visible light is large enough to excite the adsorbed CO2 molecules into an unstable state that reacts with dissociated H2O to form long-chain hydrocarbons. Because CO2 can be adsorbed from air directly onto the CoO, this catalyst does not require purified CO2, and thus enables the low-cost production of diesel-range hydrocarbons with solar energy and CO2 adsorbed from ambient air or unpurified CO2 sources.