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Tuning redox potentials of CO_2 reduction catalysts for carbon photofixation by Si nanowires

Liu, Rui and Stephani, Carolynn and Tan, Kian L. and Wang, Dunwei (2015) Tuning redox potentials of CO_2 reduction catalysts for carbon photofixation by Si nanowires. Science China Materials, 58 (7). pp. 515-520. ISSN 2095-8226. https://resolver.caltech.edu/CaltechAUTHORS:20151209-135417487

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Abstract

Si nanowires (SiNWs) are shown to absorb visible light to reduce Ni catalysts into Ni^0 compounds, enabling alkyne carboxylation reactions with CO_2 as a carbon feedstock. The reduced Ni catalysts are effective in CO_2 fixation through a 4-octyne carboxylation reaction. The reduction potentials of the Ni catalysts can be tuned from -1.35 to -0.51 V (vs. saturated calomel electrode) by altering the binding ligands. The results shed light on the nature of charge transfer from SiNWs to the catalyst for this new class of photocatalytic reactions. By controlling the CO_2 reduction potential of the catalysts with carefully ligand designs, it will bring more opportunities and options to realize the highly selective, effective and sustainable CO_2 reduction in the future.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1007/s40843-015-0068-8DOIArticle
http://link.springer.com/article/10.1007%2Fs40843-015-0068-8PublisherArticle
http://rdcu.be/ttcfPublisherFree ReadCube access
Additional Information:© 2015 Science China Press and Springer-Verlag Berlin Heidelberg. Published online 15 July 2015. The project was supported in part by US National Science Foundation (DMR 1055762) to Wang D and US National Institute of General Medical Sciences (R01GM08758) to Tan KL. Liu R is partially supported by the Joint Center for Artificial Photosynthesis, a DOE Energy Innovation Hub, supported through the Office of Science of the U.S. Department of Energy under Award Number DE-SC0004993. Author contributions: Liu R, Tan KL and Wang D designed the project and the experiments. Liu R and Stephani C performed the experiments. Liu R and Wang D analyzed the results and wrote the paper. The authors declare that they have no conflict of interest.
Group:JCAP
Funders:
Funding AgencyGrant Number
NSFDMR-1055762
National Institute of General Medical SciencesR01GM08758
Department of Energy (DOE)DE-SC0004993
Issue or Number:7
Record Number:CaltechAUTHORS:20151209-135417487
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151209-135417487
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62754
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:09 Dec 2015 22:03
Last Modified:03 Oct 2019 09:21

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