Fig. 1: The soft X-ray absorption near-edge structure (XANES). | Nature Communications

Fig. 1: The soft X-ray absorption near-edge structure (XANES).

From: Building and identifying highly active oxygenated groups in carbon materials for oxygen reduction to H2O2

Fig. 1: The soft X-ray absorption near-edge structure (XANES).The alternative text for this image may have been generated using AI.

a C K-edge. A, 1s – π* from sp2 C=C; B, 1s – π* from the etheric ring, B1, the out-of-plane C–O-C, B2, the in-plane C–O-C; C, 1s – π* from ketone or carboxylic acid; D, 1s –  σ* from sp2 C=C; D, 1s – σ* from C=O. b O K-edge. A, 1s – π* from C=O, A1, organic carbonate, A2, quinone, A3, ketone or carboxylic acid; B, the 1s – π* excitations due to the charge transfer between C and O, including C=O and C–O; C, 1s – σ* from C–O, C1, etheric ring (C–O–C), C2, the C–O in COOH; C, 1s – σ* from C=O. The soft XANES were collected in the total electron yield (TEY) mode.

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