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. 2017 Oct 16;8:934. doi: 10.1038/s41467-017-01053-x

Fig. 4.

Fig. 4

Evaluation of the p-block regulation strategy. a High-resolution TEM image of p-SnNiFe, exhibiting no obvious difference from n-SnNiFe. b Atomic ratio of Sn:(NiFe) of n-SnNiFe, s-SnNiFe, and p-SnNiFe determined by ICP, XPS, and EDS. c ECSA and d high-resolution Ni 2p XPS spectra of n-SnNiFe, s-SnNiFe, and p-SnNiFe. e Scheme of the proposed oxygen pool model and fusion-evolution OER process. Scale bars, 10 nm (a)