Fig. 5: Characterization results for beginning of test and end of test (55-hours stability tested) Bi2O3 cathode samples and results of in-situ X-ray spectroscopy studies of Bi2O3. | Nature Communications

Fig. 5: Characterization results for beginning of test and end of test (55-hours stability tested) Bi2O3 cathode samples and results of in-situ X-ray spectroscopy studies of Bi2O3.

From: A scalable membrane electrode assembly architecture for efficient electrochemical conversion of CO2 to formic acid

Fig. 5

a 3D structures of the catalyst layer by nano-Xray CT, and the catalyst particle distributions. Scale bar: 10 µm. b Top 2: HAADF-STEM images of the BOT and EOT cathode catalyst layer. Scale bar: 1 µm. Bottom 2: Zoomed-in HAADF-STEM and EDX images of the EOT cathode catalyst layer. Scale bar: 100 nm. c XRD patterns of the BOT and EOT cathode samples. d In-situ X-ray absorption spectra of the Bi2O3 electrode in 0.1 M KOH as a function of potential (0.8 V to −1.5 V vs RHE).

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