Effect of the Nafion content in the MPL on the catalytic activity of the Pt/C-Nafion electrode prepared by pulsed electrophoresis deposition

Micro Direct Methanol Fuel Cell Based on Reduced Graphene Oxide Composite Electrode

“…The Nafion membrane demonstrates obvious methanol permeation. Adding an appropriate amount of Nafion to the electrode catalyst can increase the active sites of Pt, improving the catalytic activity of the composite electrode for methanol oxidation [ 18 , 19 ]. Nafion also has a hole-making ability, which facilitates the formation of microporous channels in the catalytic layer to make the methanol solution uniformly dispersed in the catalytic layer and reduce the influence of mass transfer polarization.…”

Optimization of electrocatalyst performance of platinum–ruthenium induced with MXene by response surface methodology for clean energy application

“…MXene composition is maintained in between 70 -85wt%, nafion content is maintained in between 10 -40wt% and methanol content is maintained in between 1 -4M. These are chosen based on the literature review (Zhang et al, 2019;Wang et al, 2019;Luo et al, 2019;Abdullah et al, 2018;Zhang et al, 2018;Han et al, 2018;Adilbish and Yu, 2017;Park and Choi, 2017;Masdar et al, 2016;Zainoodin et al, 2015) and one-factor-at-one-time experimental method. The current density is chosen as a response because it is one of the most potential values for electrocatalytic activity and performance for methanol oxidation reaction.…”

“…Besides, nafion ionomer acts as a physical binder for the particles of catalyst support, which assist to retain moisture in the electrode surface area and helps to extend the three-phase boundary. However, excessive use of Nafion can lead to an increase in the mass transfer resistance (Adilbish and Yu, 2017) and too low Nafion content results in poor cell performance due to poor bonding between the particles of electrocatalyst and the electrolyte (Masdar et al, 2016). High concentration of methanol helps in the production of high energy densities and thus enhances cell performance (Vecchio et al, 2018) but too high in concentration also can decrease the active sites on the electrode (Kivrak, 2015).…”

Triple phase boundary and power density enhancement in PEMFCs of a Pt/C electrode with double catalyst layers

“…Especially, the Pt catalysts can easily be located near the surface of electrodes by using the EPD method. 20 Aer that, the obtained catalytic layer will directly be contacted to the membrane during preparing the membrane electrode assembly (MEA). It is of much importance to enhance the TPB zones and expose more catalytic active sites to fuels, whose factors greatly improve the electrocatalytic properties.…”

“…It is of much importance to enhance the TPB zones and expose more catalytic active sites to fuels, whose factors greatly improve the electrocatalytic properties. Unfortunately, the EPD process can produce the relative agglomeration of the Pt catalyst when increasing the loading amount, 20 because of the agglomeration between neighboring catalyst particles, 21 it is a big disadvantage to reduce the TPBs and mass-specic activity of the catalyst electrodes. On the other hand, great efforts have been targeted for the development of cathode catalysts for ORR activity, while less attention has been aimed at design of anode catalysts for hydrogen oxidation reaction (HOR).…”