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Peak from an X-ray photoelectron spectrum interpreted as the sum of several contributions. Excerpt from: Zhou T, Liu Z, Yang B, Cao Z, Jiang Z, Cui W, Wang K, Yu L, Lu J and Zhang L (2022) Dealloying fabrication of hierarchical porous Nickel–Iron foams for efficient oxygen evolution reaction. Front. Chem. 10:1047398. doi: 10.3389/fchem.2022.1047398 Reproduced under CreativeCommons license rights