CO2-assisted formation of grain boundaries for efficient CO–CO coupling on a derived Cu catalyst

Special Topic: Chemistry Boosts Carbon Neutrality

Open Access

Figure 1

Physical characterization of La₂CuO₄ perovskite oxide. (A) XRD pattern of La₂CuO₄ powder. (B) XPS high resolution spectrum of the La 3d and Cu 2p region. (C) SEM image of La₂CuO₄ particle. Scale bar: 500 nm. (D) HAADF-STEM image and the corresponding EDS elemental mapping of La₂CuO₄ particle. Scale bar: 50 nm. (E) Atomic-resolution HAADF-STEM image of La₂CuO₄. Scale bar: 1 nm. Inset is the line intensity profile acquired along the yellow arrow of [001] direction. Green and yellow balls represent La and Cu atoms, respectively. (F) Crystal structure of La₂CuO₄.

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