fig17
Figure 17. XPS (A) P2p and (B) N1s spectra for PNGF_DAP and PNGF_DAP_800; (C) Relative ratio of XPS N1s binding configurations for PNGF_DAP, PNGF_ADP, PNGF_ADP(op) and PNGF(op); (D) Bifunctional ORR/OER activities. Reproduced with permission. Copyright 2017, Royal Society of Chemistry[31].
