Fig. 4: In situ characterization for reaction mechanism.
From: A lattice oxygen-free design for efficient and stable photothermal methane dry reforming

In situ DRIFTS over N1 catalyst in the dark (a) and light irradiation (b) in the atmosphere of CO2, CH4, and Ar (10/10/80 vol%) mixture from 300 to 540 °C, dotted lines mark the positions of the peaks. c In situ DRIFTS over N1 catalyst in the dark and light irradiation in the atmosphere of CH4 and Ar (10/90 vol%) mixture at 540 °C. NAPXPS spectra of Ni 2p (d), Co 2p (e), O 1 s (f) and N 1 s (g) with and without illumination.