2026-06-04 イェール大学
This 3D illustration of the new artificial leaf highlights the device’s photoelectrode, which is based on silicon micro-pillars and a cobalt phthalocyanine-carbon nanotube catalyst for converting carbon dioxide to methanol. Credit: Yuanzuo Gao
＜関連情報＞
- https://news.yale.edu/2026/06/04/growing-new-leaf-harnesses-sun-water-and-co2-make-liquid-fuel
- https://pubs.acs.org/doi/10.1021/jacs.6c04213
CO₂とH₂Oからの太陽光メタノール生産のためのモノリシック人工葉 A Monolithic Artificial Leaf for Solar Methanol Production from CO2 and H2O
Bo Shang,Kunpeng Yu,Hannah R. M. Margavio,Haozhou Yang,Yuanzuo Gao,Jindou Yang,Jing Li,Min Li,Jinquan Shi,Mengxia Liu,Gregory N. Parsons,Jillian L. Dempsey,Gerald J. Meyer,Thomas E. Mallouk,and Hailiang Wang
Journal of the American Chemical Society Published: April 30, 2026
DOI:https://doi.org/10.1021/jacs.6c04213
Abstract
Methanol, an important liquid fuel and chemical feedstock, has yet to be produced using solar energy, H2O, and CO2 as sole inputs in a standalone device. This study directly addresses this longstanding challenge through presenting the first demonstration of unbiased solar methanol production from CO2 and H2O with a monolithic artificial leaf design, surpassing the previous best energy efficiency in solar alcohol production by at least 1 order of magnitude. We first develop a new generation of photocathodes based on Si micropillar arrays and a cobalt tetraaminophthalocyanine molecular catalyst. By integrating a C60 interlayer that facilitates unidirectional electron transfer through the semiconductor/catalyst interface, we realize a photovoltage of 500 mV, one of the highest recorded for single-junction Si-based photoelectrodes in aqueous CO2 reduction, as well as unprecedented methanol formation with a Faradaic efficiency of 30% and a partial current density of 6.3 mA cm–2. We further integrate the photocathode with a multijunction perovskite photovoltaic minimodule to afford a standalone solar fuel system, which demonstrates a light-to-methanol conversion efficiency of 0.8%, 32 times higher than the present record in light-to-alcohol conversion with an artificial leaf.
