Li Yaguang, Meng Fanqi, Wu Qixuan, Yuan Dachao, Wang Haixiao, Liu Bang, Wang Junwei, San Xingyuan, Gu Lin, Meng Qingbo
Research Center for Solar Driven Carbon Neutrality, Engineering Research Center of Zero-carbon Energy Buildings and Measurement Techniques, Ministry of Education, The College of Physics Science and Technology, Institute of Life Science and Green Development, Hebei University, Baoding 071002, China.
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.
Sci Adv. 2024 May 17;10(20):eadn5098. doi: 10.1126/sciadv.adn5098.
The scalable artificial photosynthesis composed of photovoltaic electrolysis and photothermal catalysis is limited by inefficient photothermal CO hydrogenation under weak sunlight irradiation. Herein, NiO nanosheets supported with Ag single atoms [two-dimensional (2D) NiAgO] are synthesized for photothermal CO hydrogenation to achieve 1065 mmol g hour of CO production rate under 1-sun irradiation. This performance is attributed to the coupling effect of Ag-O-Ni sites to enhance the hydrogenation of CO and weaken the CO adsorption, resulting in 1434 mmol g hour of CO yield at 300°C. Furthermore, we integrate the 2D NiAgO-supported photothermal reverse water-gas shift reaction with commercial photovoltaic electrolytic water splitting to construct a 103-m scale artificial photosynthesis system (CO + HO → CO + H + O), which achieves more than 22 m/day of green syngas with an adjustable H/CO ratio (0.4-3) and a photochemical energy conversion efficiency of >17%. This research charts a promising course for designing practical, natural sunlight-driven artificial photosynthesis systems.
由光电电解和光热催化组成的可扩展人工光合作用受到弱太阳光照射下光热CO加氢效率低下的限制。在此，合成了负载Ag单原子的NiO纳米片（二维（2D）NiAgO）用于光热CO加氢，在1个太阳光照下实现了1065 mmol g⁻¹ h⁻¹的CO产率。这种性能归因于Ag-O-Ni位点的耦合效应，增强了CO的加氢作用并减弱了CO的吸附，在300°C时CO产率达到1434 mmol g⁻¹ h⁻¹。此外，我们将负载2D NiAgO的光热逆水煤气变换反应与商业光电解水制氢相结合，构建了一个103平方米规模的人工光合作用系统（CO₂ + H₂O → CO + H₂ + O₂），该系统实现了超过22 m³/天的绿色合成气，H₂/CO比可调（0.4 - 3），光化学能量转换效率>17%。这项研究为设计实用的、自然阳光驱动的人工光合作用系统指明了一条充满希望的道路。
