Articles | Volume 10, issue 1
Earth Syst. Dynam., 10, 1–7, 2019
https://doi.org/10.5194/esd-10-1-2019

Special issue: ESD Ideas

Earth Syst. Dynam., 10, 1–7, 2019
https://doi.org/10.5194/esd-10-1-2019

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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Cited articles

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
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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.
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