University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Kavli Energy NanoScience Institute, Berkeley, CA (United States)
Artificial photosynthesis offers a route to producing clean fuel energy. However, the large thermodynamic requirement for water splitting along with the corresponding sluggish kinetics for the oxygen evolution reaction (OER) limits its current practical application. Here, we offer an alternative approach by replacing the OER with the glycerol oxidation reaction (GOR) for value-added chemicals. By using a Si photoanode, a low GOR onset potential of -0.05 V vs RHE and a photocurrent density of 10 mA/cm2 at 0.5 V vs RHE can be reached. Coupled with a Si nanowire photocathode for the hydrogen evolution reaction (HER), the integrated system yields a high photocurrent density of 6 mA/cm2 with no applied bias under 1 sun illumination and can run for over 4 days under diurnal illumination. In conclusion, the demonstration of the GOR-HER integrated system provides a framework for designing bias-free photoelectrochemical devices at appreciable currents and establishes a facile approach to artificial photosynthesis.
Lin, Jia-An, et al. "Photochemical Diodes for Simultaneous Bias-Free Glycerol Valorization and Hydrogen Evolution." Journal of the American Chemical Society, vol. 145, no. 24, Jun. 2023. https://doi.org/10.1021/jacs.3c01982
Lin, Jia-An, Roh, Inwhan, & Yang, Peidong (2023). Photochemical Diodes for Simultaneous Bias-Free Glycerol Valorization and Hydrogen Evolution. Journal of the American Chemical Society, 145(24). https://doi.org/10.1021/jacs.3c01982
Lin, Jia-An, Roh, Inwhan, and Yang, Peidong, "Photochemical Diodes for Simultaneous Bias-Free Glycerol Valorization and Hydrogen Evolution," Journal of the American Chemical Society 145, no. 24 (2023), https://doi.org/10.1021/jacs.3c01982
@article{osti_2282485,
author = {Lin, Jia-An and Roh, Inwhan and Yang, Peidong},
title = {Photochemical Diodes for Simultaneous Bias-Free Glycerol Valorization and Hydrogen Evolution},
annote = {Artificial photosynthesis offers a route to producing clean fuel energy. However, the large thermodynamic requirement for water splitting along with the corresponding sluggish kinetics for the oxygen evolution reaction (OER) limits its current practical application. Here, we offer an alternative approach by replacing the OER with the glycerol oxidation reaction (GOR) for value-added chemicals. By using a Si photoanode, a low GOR onset potential of -0.05 V vs RHE and a photocurrent density of 10 mA/cm2 at 0.5 V vs RHE can be reached. Coupled with a Si nanowire photocathode for the hydrogen evolution reaction (HER), the integrated system yields a high photocurrent density of 6 mA/cm2 with no applied bias under 1 sun illumination and can run for over 4 days under diurnal illumination. In conclusion, the demonstration of the GOR-HER integrated system provides a framework for designing bias-free photoelectrochemical devices at appreciable currents and establishes a facile approach to artificial photosynthesis.},
doi = {10.1021/jacs.3c01982},
url = {https://www.osti.gov/biblio/2282485},
journal = {Journal of the American Chemical Society},
issn = {ISSN 0002-7863},
number = {24},
volume = {145},
place = {United States},
publisher = {American Chemical Society (ACS)},
year = {2023},
month = {06}}
