AuPt Nanoparticles Clusters on MWCNTs with Enhanced Electrocatalytic Activity for Methanol Oxidation

Abstract

AuPt nanoparticles clusters (NPCs) were electrodeposited on multiwalled carbon nanotubes (MWCNTs). The as-prepared AuPt NPCs@MWCNTs nanocomposites exhibited considerably enhanced electrocatalytic activity than Pt NPs@MWCNTs for methanol oxidation in acid medium. In comparison with Pt NPs@MWCNTs, a remarkable resistance to CO poisoning and a higher If/Ib value (the ratio of the forward scan oxidation peak current (If) and reverse scan oxidation peak current (Ib)) was achieved by AuPt NPCs@MWCNTs electrocatalyst, which is attributable to the unique NPCs nanostructure with enlarged electrochemical active surface areas. These results demonstrated the potential of AuPt NPCs@MWCNTs, which can be considered as an efficient electrocatalyst for methanol oxidation in direct methanol fuel cells.

Electrocatalytic Properties of a BaTiO3/MWCNT Composite for Citric Acid Detection

“…The electrocatalytic performance of oxides can be generally enhanced by adding Pt and its alloys; however, the high cost, low abundance, and toxicity associated with Pt and its alloys hinder their usage. Alternatively, carbonaceous materials, including graphene oxide (GO) and carbon nanotubes (CNTs), present low cost, high abundance, high stability, large surface-to-volume ratio, and enhanced electron-transfer ability; hence, they are a great alternative to Pt and its alloy to improve the electrocatalytic activity of electrochemical sensing materials [29][30][31][32].…”

Free-Standing, Interwoven Tubular Graphene Mesh-Supported Binary AuPt Nanocatalysts: An Innovative and High-Performance Anode Methanol Oxidation Catalyst

“…As indicated in Figure 6 c, the Au 4f 7/2 and 4f 5/2 binding energies of TG/Au 52 Pt 48 are 83.9 eV and 87.6 eV, respectively, same as those of TG/Au 0.258 , and lower than those of standard metallic Au 0 , indicating no change of the electron structure of Au NPs after Pt NPs growth. Furthermore, lower binding energies of the Pt 4f 7/2 (71.2 eV) and Pt 4f 5/2 (74.6 eV) (see Figure 6 d) were observed for the TG/Au 52 Pt 48 compared with those of the TG/Pt 0.241 (see Figure 6 b), suggesting that Au NPs promote the donation of electrons from Pt to TG [ 17 , 38 , 56 ].…”

Nickel Sulfide (Ni3S2)/Multi-Walled Carbon Nanotubes (MWCNTs) Nanohybrids for Enhanced Electrocatalytic Activity Towards Methanol Oxidation

“…Recently, Noor et al have shown the effect of concentration of rGO in the NiO/CuO based metal organic framework. Wang et al [18] prepared Au@MWCNTs with higher surface area for efficient electrocatalytic activity for superior MOR. Our research group have recently reported [8] nanocatalysts with MOS 2 nanorods anchored on rGO nanosheets with enhanced electrocatalytic activity for Pt free electrocatalysts.…”