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Fig. 2 | Nano Convergence

Fig. 2

From: Photocatalytic and electrocatalytic approaches towards atmospheric nitrogen reduction to ammonia under ambient conditions

Fig. 2

(Reproduced with permission [30] Copyright 2017, American Chemical Society)

a Potential determining steps for the electrochemical N2 fixation to NH3 on metal oxide surfaces with binding energies of NNH. b Comparison of the free energy adsorption of NNH and that of H on metal oxide surfaces. (The dashed lines indicate where these free energies are equal. The oxides below these dashed lines show that NH3 formation can occur without being poisoned with protons)

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