Synthesis of MCM‐41 mesoporous silica nanoparticles supported titanium dioxide‐silver nanocomposite with excellent methanol electrooxidation performance

Abstract

Considering the importance of the fuel cells, we developed an appropriate and efficient electrode system for electrocatalytic oxidation of methanol by fabricating the electrode with naturally based synthesized mobil composition of matter No. 41 (MCM-41) mesoporous silica nanoparticle along with silver and titanium dioxide nanoparticles. The extracted silica from natural stem straw was applied in the synthesis of MCM-41 mesoporous silica nanoparticle and characterization of the products was performed by different techniques. Then, the synthesized MCM-41 mesoporous silica is modified by silver and titanium dioxide nanoparticles and is employed in the fabrication of the modified carbon paste electrodes (Ag/TiO 2 /MCM-41/CPE) that are accordingly used in the electrocatalytic oxidation of methanol. The mechanistic and kinetic studies of the reactions are thoroughly examined based on cyclic voltammetry and chronoamperometry techniques. The results reveal that the modified carbon paste electrode with silver and titanium dioxide nanoparticles supported onto MCM-41 mesoporous silica exhibit much higher current densities and less overpotentials than that at the bare carbon paste electrode. The results of the electrocatalytic oxidation of methanol are then compared to the literature indicating that the developed system is favorable for the direct methanol fuel cells. K E Y W O R D Selectrochemistry, direct methanol fuel cells, stem can ash, MCM-41 nanoparticles, Ag/TiO 2 /MCM-41/CPE

Plasmonic porous micro- and nano-materials based on Au/Ag nanostructures developed for photothermal cancer therapy: challenges in clinicalization

“… 99 Recently, several novel and modified synthesis methods have emerged for the synthesis of porous silica particles. The most common porous silica particles with a pore size in the mesoporous range are Mobil Crystalline Materials-41 (MCM-41), 100 Santa Barbara Amorphous (SBA-15), 101 Hiroshima Mesoporous Material (HMM-33), Technical Delft University (TUD-1), folded sheets mesoporous materials (FSM-16), MCM-48, SBA-11, SBA-12, SBA-16, and KIT-5. Table 2 demonstrates the most popular types of porous silica and their characteristics.…”