Preparation of Pt/MgO/CNT Hybrid Catalysts and Their Electrocatalytic Properties for Ethanol Electrooxidation

Abstract

The micrograph and elemental compositions of Pt/MgO/CNT catalysts were characterized by scanning electron microscopy and energy-dispersive X-ray spectroscopy, respectively. The electrocatalytic properties of the Pt/ MgO/CNT catalyst for ethanol oxidation have been investigated by cyclic voltammetry in 1.0 mol L -1 CH 3 -CH 2 OH and 1.0 mol L -1 KOH aqueous solution. The effect of the content of MgO on the electrocatalytic activity of the Pt/MgO/CNT catalyst was also investigated. Under the same Pt loading mass and experimental conditions for ethanol oxidation, the Pt/MgO/CNT catalyst shows higher electrocatalytic activity than the Pt/ CNT catalyst. Additionally, the Pt/MgO/CNT catalyst possesses a good antipoisoning ability.

A Metal–Organic Framework as an Electrocatalyst for Ethanol Oxidation

“…This behavior is different from that of Pt-based catalysts, which are easily poisoned by the oxidation products of ethanol, such as CO and other intermediates. [15] A current density as high as about 3 mAcm À2 can be achieved when the ethanol concentration is 2 m. It is also noticeable that the EER potential on the [(HOC 2 H 4 ) 2 dtoaCu] catalyst is lower than some of the reported EER potential values on the Pt-based catalysts in acidic media, such as Pt-Sn, [16] Pt/MWNT, [17] and Pt nanocrystals. [18] The effect of the potential sweep rate on the behavior of ethanol oxidation was also investigated.…”

Carbon Nanotubes and Carbon Nanotubes/Metal Oxide Heterostructures: Synthesis, Characterization and Electrochemical Property

“…The resulting amino-functionalized QDs then reacted with the carboxylic groups of the acid-treated CNTs to form amide bonds. Metal oxides can be attached to the carboxyl groups without any linking agent due to their hydrophilic nature, as recently demonstrated for MnO 2 [111], MgO [112], and TiO 2 [113]. However, the authors observed only weak interactions between the oxides and the acidterminated CNTs, resulting in rather nonuniform distributions of the nanoparticles.…”

PtCo alloy nanoparticles supported on graphene nanosheets with high performance for methanol oxidation

“…As displayed in Figure 7(b), the electrode potential increases gradually at first and then instantaneously reaches to a much higher potential for all catalysts. This is due to the fact that during the chronopotentiometric experiment, the carbonaceous residues are accumulated on the surface of electrocatalysts, leaing to a lower electrocatalytic activity of catalysts [57]. Thus the potential must increase to satisfy the applied current until a potential is reached where larger amounts of H 2 O can be decomposed [58].…”