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. 2021 Jun 12;33(33):2007285. doi: 10.1002/adma.202007285

Figure 5.

Figure 5

a) The schematic representation of the energy band diagram of the Cu2O/CuO bilayer composite in contact with a solution during PEC HER. b) Proposed mechanism of PEC water splitting. c) The energy band structure of Cu2O, Cu2O/CuO, and Cu2O/CuO/Ni. d,e) Stability measurement of Cu2O/CuO and Cu2O/CuO/Ni‐3 (up to 3 deposition cycles), respectively. a) Reproduced under the terms of the CC‐BY Creative Commons Attribution 4.0 International license (https://creativecommons.org/licences/by/4-0).[ 35 ] Copyright 2020, The Authors, published by Springer Nature. b–e) Reproduced with permission.[ 208 ] Copyright 2020, Royal Society of Chemistry.