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. Author manuscript; available in PMC: 2019 Feb 28.
Published in final edited form as: Chem Rev. 2018 Jan 10;118(4):1691–1741. doi: 10.1021/acs.chemrev.7b00305

Figure 5.

Figure 5

(a) Reduction of A in aqueous solution and its connection with the corresponding reaction in gas phase. (b) Reduction in the hydrogen electrode and hypothetical intermediate steps of proton dehydration and hydrogen atom formation.