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ESD | Articles | Volume 10, issue 1
Earth Syst. Dynam., 10, 1–7, 2019
https://doi.org/10.5194/esd-10-1-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue: ESD Ideas

Earth Syst. Dynam., 10, 1–7, 2019
https://doi.org/10.5194/esd-10-1-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

ESD Ideas 04 Jan 2019

ESD Ideas | 04 Jan 2019

ESD Ideas: Photoelectrochemical carbon removal as negative emission technology

Matthias M. May and Kira Rehfeld

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Amillo, A. G., Huld, T., and Müller, R.: A New Database of Global and Direct Solar Radiation Using the Eastern Meteosat Satellite, Models and Validation, Remote Sens., 6, 8165–8189, https://doi.org/10.3390/rs6098165, 2014. a
Anderson, K. and Peters, G.: The trouble with negative emissions, Science, 354, 182–183, https://doi.org/10.1126/science.aah4567, 2016. a
Araki, K., Nagai, H., Ikeda, K., Lee, K. H., and Yamaguchi, M.: Optimization of Land Use for a Multitracker System Using a Given Geometrical Site Condition, IEEE J. Photovolt., 6, 960–966, https://doi.org/10.1109/JPHOTOV.2016.2569443, 2016. a
Chang, N., Ho-Baillie, A., Wenham, S., Woodhouse, M., Evans, R., Tjahjono, B., Qi, F., Chong, C. M., and Egan, R. J.: A techno-economic analysis method for guiding research and investment directions for c-Si photovoltaics and its application to Al-BSF, PERC, LDSE and advanced hydrogenation, Sustain. Energy Fuels, 2, 1007–1019, https://doi.org/10.1039/C8SE00047F, 2018. a
Cheng, W.-H., Richter, M. H., May, M. M., Ohlmann, J., Lackner, D., Dimroth, F., Hannappel, T., Atwater, H. A., and Lewerenz, H.-J.: Monolithic Photoelectrochemical Device for 19 % Direct Water Splitting, ACS Energy Lett., 3, 1795–1800, https://doi.org/10.1021/acsenergylett.8b00920, 2018. a, b, c
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Current CO2 emission rates are incompatible with the 2 °C target for global warming. Negative emission technologies are therefore an important basis for climate policy scenarios. We show that photoelectrochemical CO2 reduction might be a viable, high-efficiency alternative to biomass-based approaches, which reduce competition for arable land. To develop them, chemical reactions have to be optimized for CO2 removal, which deviates from energetic efficiency optimization in solar fuel applications.
Current CO2 emission rates are incompatible with the 2 °C target for global warming. Negative...
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