This work uses MoTe2 single crystals to address the challenge in heterogeneous catalysis of identifying active sites and determining the electronic factors responsible for catalytic activity. We find ...

Isolated N-doped graphene oxide flakes are characterized using scanning electrochemical cell microscopy (SECCM) to investigate their performance in V(V/IV) reactions. The response of sub-domains is h...

Several thermochemical redox reactions have been shown to operate via the coupling of electrochemical half-reactions. Here, scanning electrochemical cell microscopy is employed to image the variations...

Abstract. Triboelectrically charged surfaces are important in a range of technologies, but it remains difficult to measure charge density on these surfaces

As illustrated in Fig. 1, we initially used SECCM to image surface heterogeneity for each half-reaction in isolation: the FAOR under an Ar atmosphere in the absence of O2, denoted as FAOR(Ar), and the ORR in the absence of FA. To explain the effect of surface structure, for example, crystallographic orientations, on electrochemical reactions, we used identical-location EBSD. This technique allowed us to characterize the crystallographic structure of the Pt surface, which exhibited eight different grains within the probed region (Fig. 2a) with orientation distributions close to (122), (344), (334), (023), (100), (112), (034) and (144) planes. Notably, the Pt(112) plane consisted of three adjacent grains, all oriented close to this plane as shown in Supplementary Fig. 1. Therefore, we analysed these three grains as a single Pt(112) grain although we acknowledge that there are small differences in surface structure. We subjected the Pt sample to UV and electrochemical cleaning for 300 cycles before each experiment. Supplementary Fig. 2 shows the voltammetric response obtained during the electrochemical cleaning process, with the resulting voltammograms being consistent with a clean polycrystalline Pt surface (hydrogen adsorption and desorption peaks as main indicators)43. After rinsing with deionized water and drying with nitrogen gas, we...

Redox-programmed surfaces, encoded via localised molecular redox events, offer a transformative route to next-generation information storage and processing. Scanning electrochemical cell microscopy (SECCM) enables precise microdroplet patterning at submicrometer resolution, allowing spatiotemporal control of redox activity and advancing access to molecularly controlled, cognitive computing technologies.