Synthesis of N-rGO-MWCNT/CuCrO2 Catalyst for the Bifunctional Application of Hydrogen Evolution Reaction and Electrochemical Detection of Bisphenol-A

A glassy carbon electrode (GCE) coated with delafossite CuCrO2 loading on the nitrogen-doped reduced graphene oxide (N-rGO) and multiwalled nanotubes (MWCNT) composite (N-rGO-MWCNT/CuCrO2) was applied to hydrogen evolution reaction Bisphenol-A (BPA) detection. First, N-rGO-MWCNT prepared by in situ chemical reduction caffeic acid as a reducing agent. Then, accumulated surface form N-rGO-MWCNT/CuCrO2 composite. The morphology structure of N-rGO-MWCNT/ analyzed different characterization techniques. Besides, GCE/N-rGO-MWCNT/CuCrO2 investigated for (HER), which shows an excellent electrocatalytic activity low over-potential, increasing current, small Tafel slope 62 mV·dec−1 at 10 mA·cm−2 long-term stability. Moreover, electrochemical determination BPA range 0.1-110 µM, detection limit 0.033 µM (S/N = 3) higher sensitivity 1.3726 µA µM−1 cm−2. Furthermore, effective food samples acceptable recoveries. Hence, finding can be observed impressive catalyst HER oxidation.