Figure 7

Time-dependent XPS spectra of the Fe 2p (left) and the O 1s (right) of the related ZVI samples (AS-ZVI and AP-ZVI), in the FL system and the MF-FL system, respectively.

Time-dependent XPS spectra of the Fe 2p (left) and the O 1s (right) of the related ZVI samples (AS-ZVI and AP-ZVI), in the FL system and the MF-FL system, respectively.