Palladium Nanoparticles Loaded on Carbon Modified TiO2 Nanobelts for Enhanced Methanol Electrooxidation

Abstract

Abstract:Carbon modified TiO2 nanobelts (TiO2-C) were synthesized using a hydrothermal growth method, as a support material for palladium (Pd) nanoparticles (Pd/TiO2-C) to improve the electrocatalytic performance for methanol electrooxidation by comparison to Pd nanoparticles on bare TiO2 nanobelts (Pd/TiO2) and activated carbon (Pd/AC). Cyclic voltammetry characterization was conducted with respect to saturated calomel electrode (SCE) in an alkaline methanol solution, and the results indicate that the specific activity of Pd/TiO2-C is 2.2 times that of Pd/AC and 1.5 times that of Pd/TiO2. Chronoamperometry results revealed that the TiO2-C support was comparable in stability to activated carbon, but possesses an enhanced current density for methanol oxidation at a potential of −0.2 V vs. SCE. The current study demonstrates the potential of Pd nanoparticle loaded on hierarchical TiO2-C nanobelts for electrocatalytic applications such as fuel cells and batteries.

Pt incorporated mesoporous carbon spheres: controllable structure with enhanced catalytic activity and stability

“…4 Many efforts have focused on improving catalytic effectiveness by dispersing noble metal catalyst onto an appropriate support with high surface area, such as metallic oxides. [5][6][7][8] Among the various support materials, carbon materials have attracted tremendous research interest due to the attractive properties such as low cost, high surface area and excellent thermal stability. 9,10 To date, a lot of works have been focused on decorating metal NPs on carbon-based nanomaterials including carbon ber, 11 carbon nanotube, 12,13 hollow carbon sphere, 14,15 and graphene.…”

Simulation of Irreversible Electro-oxidation on a Partially Blocked Electrode

“…Considering some other data published for methanol [22][23] and ethanol [32], an average ratio 2.5 ± 0.5 was calculated. These show that the proposed indicator can be used for the estimation of an increased activity of the catalyst after the reactivation in the electro-oxidation of methanol [29][30], ethanol [35], glycerol [38] and formic acid [39].…”

Synthesis of a Ni‐Pt Electrocatalyst Supported on PRh/ZnO Nanocomposites and Its Electrocatalytic Behaviour towards Methanol Electrooxidation

“…The electrocatalyst durability is of great importance for practical applications in DMFCs . For evaluation of the electrocatalytic activity and long‐term stability of the catalysts, CA tests were also recorded for the synthesized samples at a constant potential of −0.3 V in a solution of 1 m methanol + 0.5 m KOH in a duration of 900 s (Figure ).…”

“…The electrocatalyst durability is of great importance for practical applications in DMFCs. [33] For evaluation of the electrocatalytic activity and long-term stability of the catalysts, CA tests were also recorded for the synthesized samples at a constant potential of À 0.3 V in a solution of 1 m methanol + 0.5 m KOH in a duration of 900 s (Figure 7). As can be seen, both samples go through downward trends, commencing from the very early stage of experiments; however, the slope of the PRh/ZnO/Ni/Pt modified CPE electrode curve is not as sharp as that of the CPE/PRh/ZnO/Ni/Pt.…”