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Electrode characterization post chronoamperometry test: a) XRD spectrum, b) SEM image, c) wide scan of the XPS spectrum, d) W 4f peak of the XPS spectrum (left graph) and O 1s peak of the XPS spectrum (right graph), e) HRTEM images of W2C/WOx NPs on VGNWs hybrid after the chronoamperometry test and f) LSV curves comparison of the electrode in pristine and post-chronoamperometry test state.
