A hierarchical hybrid of ZnCo ₂ O ₄ and rGO as a significant electrocatalyst for methanol oxidation reaction: Synthesis, characterization, and electrocatalytic performance

Enabling methanol oxidation by an interacting hybrid nanosystem of spinel Co3O4 nanoparticle decorated MXenes

“…8 In this context, an alkaline medium is preferred because of the following advantages: (i) electro-oxidation of the fuel is invariant of the structure, (ii) it reduces CO poisoning, and (iii) it paves the path for non-noble metals/metal oxides as anode catalysts. 9,10 Transition metal oxides (TMOs) have garnered interest in energy conversion 11,12 and storage applications 13,14 due to their low cost, controllable chemical and textural properties, and good electrochemical properties. TMOs are emerging as potential alternatives to noble metal-based electrocatalysts owing to their high stability in an alkaline medium and brilliant electrochemical properties arising because of the presence of multiple oxidation states of metal cations.…”

Enhanced performance of methanol oxidation reaction via green synthesis of platinum electro‐catalyst from sugar cane bagasse

“…The barrier through which the electron has to travel to the adsorbed species across the electrode surface or from the adsorbed species to the electrode surface is described as R ct induced by Faradaic reaction 65 . As shown in Figure 12D, the Nyquist plot comprise of a small semicircles or arcs at the high frequency corresponding to the combination of charge transfer resistance, R ct and the double layer capacitance between the interface of the electrode and the electrolyte, whereas a straight line with a phase angle near 45° in the low frequency is related to capacitive behaviour of electrode 66 . In this context, the semicircle were observed in the high frequency regions, suggesting the presence of charge transfer resistance, R ct on the surface of the electrodes arisen from methanol oxidation 67 .…”

Progress and challenges: Review for direct liquid fuel cell

“…Although all the reported NPCs have a good performance of electrocatalytic activities, they are still far to reach a real application in a single‐cell alcohol fuel cell test due to durability issue. Exceptionally, very recently, studies done by Askari et al 260 have synthesized a hierarchical hybrid ZnCo 2 O 4 supported reduced graphene oxide (rGO) and succeeded by applying in real field of single‐cell performance of active‐mode DMFCs. This electrocatalyst material, synthesized by hydrothermal methods at 120°C for 20 hours, has shown a high power density of 24.3 mWcm −2 as presented in Figure 12.…”

“…Single‐cell performances of active DMFCs of ZnCo 2 O 4 /rGO 260 [Colour figure can be viewed at wileyonlinelibrary.com]…”