Figure 10. (a) Schematic of the formation process of the Cr-WSe2/graphene heterojunction. (b) Schematic of the on-chip electrocatalytic device.[85] Copyright 2022, American Chemical Society. (c) In situ I-V measurements of individual Co3O4, P0-Co3O4 and P-Co3O4 thin-films. Inset: The schematic of in situ I-V measurements. The applied potentials in WE1 and WE2 (called V1 and V2) increase synchronously vs. RHE, from 1 to 1.8 V, and keep the constant tiny potential difference ΔV (ΔV=1 mV).[159] Copyright 2021, Elsevier Ltd. All rights reserved. (d) On-chip electrochemical measurement setup for the ORR. (e) Schematic illustration of the setup. (f) Schematic diagram of the static and microfluidic PDMS cells.[84] Copyright 2022, Wiley-VCH Verlag GmbH & Co.
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