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. 2015 Apr 15;20(4):6739–6793. doi: 10.3390/molecules20046739

Figure 27.

Figure 27

Pathways of 2e/2H+ photoreduction of CO2 to formic acid. DFT energy barriers (<1 eV) favour the green route (via B1) and the red route (via A1) (reproduced from [316] with permission of the Royal Society of Chemistry).