Fig. 4
From: Regulating p-block metals in perovskite nanodots for efficient electrocatalytic water oxidation
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)
