Synergetic effect induced/tuned bimetallic nanoparticles (Pt-Ni) anchored graphene as a catalyst for oxygen reduction reaction and scalable SS-314L serpentine flow field proton exchange membrane fuel cells (PEMFCs)

Velayutham, Rajavel; Palanisamy, Karthikeyan; Manikandan, Ramu; Velumani, Thiagarajan; AP, Senthil Kumar; Puigdollers, J.; Kim, Byung Chul

doi:10.1016/j.mseb.2022.115780

Cited by 12 publications

(1 citation statement)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This may also be used to detect material degradation or any change structure of the MEA. In EIS, high‐frequency impedance is related to the membrane's ohmic resistance and low‐frequency impedance is closely related to the catalyst activity and electrode's active surface area [57, 58]. EIS was measured at 0.5 V for every 100 cycles.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the influence of Pt/C percentage and humidity on the voltage decay rate of proton exchange membrane fuel cell

et al. 2022

View full text Add to dashboard Cite

Voltage degradation is the main parameter that determines the effective usable life of a fuel cell, here the influence of Pt/C% and relative humidity (RH%) on the voltage decay rate of a fuel cell is experimentally evaluated and reported.This study implements a stress test with frequent interrupts of purging for determining the durability of the fuel cells. In the course of the 1456 h stress test for each membrane electrode assembly (MEA), the polarization curve and electrochemical impedance spectroscopy (EIS) were measured. The experimental results make it evident that the lowest voltage degradation was 6 µV/h for MEA with 40% Pt/C tested under 70% RH while the highest was 183 µV/h recorded for MEA with 20% Pt/C tested under 90% RH. From EIS results, the ohmic resistance increased for all the tested MEAs, which is also reflected in the performance degradation. Field emission scanning electron microscopy images also indicate the delamination of MEA layers which in turn increases the electron transfer resistance. So, the decisive factors for the fuel cell performance degradation were flooding, catalyst surface contamination, and delamination of MEA layers due to repeated mechanical and chemical stresses.

show abstract

Section: Resultsmentioning

confidence: 99%

Investigation of the influence of Pt/C percentage and humidity on the voltage decay rate of proton exchange membrane fuel cell

et al. 2022

View full text Add to dashboard Cite

show abstract

Nanoarchitectonics of Nickel Nitride‐V₂CT_X Mxene: An Efficient Bifunctional Catalyst for Alkaline Water/Seawater Applications

Deepak,

Singh,

Mahapatra

et al. 2024

Advanced Sustainable Systems

View full text Add to dashboard Cite

Seawater, being the most plentiful natural water source worldwide, is a highly abundant and cost‐efficient medium for producing hydrogen by alkaline water electrolysis. However, the advancement of seawater electrolysis is hindered by notable impediments caused by chloride corrosion at the anode and the simultaneous chlorine evolution process. Only a limited number of non‐noble electrocatalysts demonstrate noteworthy bifunctional catalytic efficacy and long‐term durability. In this regard, Nickel Nitride tailored V2CTX Mxene nanostructures is reported as a bifunctional catalyst for overall water/seawater applications. The optimized sample Ni3N@3000‐V2CTx exhibits low overpotential values of 90 and 300 mV in acidic and alkaline + seawater solutions respectively at 10 mA cm−2 for hydrogen evolution reaction. Similarly, this catalyst shows 70 and 240 mV overpotential values in alkaline water and alkaline + seawater solutions respectively at the same current density for oxygen evolution reaction. Synergetic effects of Multiple Vanadium and Nickel valency along with compelling nitrogen bonds creates elevated density of exposed functional sites for electrocatalytic activity. Furthermore, the notable electrochemical active surface area and mass activity suggest an enhanced and significant presence of abundant active sites. Additionally, the high stability and significantly decreased charge transfer resistance expedited the overall water/seawater‐splitting reaction rate.

show abstract

Electrochemical label-free immunoassay of HE4 using 3D PtNi nanocubes assemblies as biosensing interfaces

et al. 2022

View full text Add to dashboard Cite

Synergetic effect induced/tuned bimetallic nanoparticles (Pt-Ni) anchored graphene as a catalyst for oxygen reduction reaction and scalable SS-314L serpentine flow field proton exchange membrane fuel cells (PEMFCs)

Cited by 12 publications

References 58 publications

Investigation of the influence of Pt/C percentage and humidity on the voltage decay rate of proton exchange membrane fuel cell

Investigation of the influence of Pt/C percentage and humidity on the voltage decay rate of proton exchange membrane fuel cell

Nanoarchitectonics of Nickel Nitride‐V₂CT_X Mxene: An Efficient Bifunctional Catalyst for Alkaline Water/Seawater Applications

Electrochemical label-free immunoassay of HE4 using 3D PtNi nanocubes assemblies as biosensing interfaces

Contact Info

Product

Resources

About

Synergetic effect induced/tuned bimetallic nanoparticles (Pt-Ni) anchored graphene as a catalyst for oxygen reduction reaction and scalable SS-314L serpentine flow field proton exchange membrane fuel cells (PEMFCs)

Cited by 12 publications

References 58 publications

Investigation of the influence of Pt/C percentage and humidity on the voltage decay rate of proton exchange membrane fuel cell

Investigation of the influence of Pt/C percentage and humidity on the voltage decay rate of proton exchange membrane fuel cell

Nanoarchitectonics of Nickel Nitride‐V2CTX Mxene: An Efficient Bifunctional Catalyst for Alkaline Water/Seawater Applications

Electrochemical label-free immunoassay of HE4 using 3D PtNi nanocubes assemblies as biosensing interfaces

Contact Info

Product

Resources

About

Nanoarchitectonics of Nickel Nitride‐V₂CT_X Mxene: An Efficient Bifunctional Catalyst for Alkaline Water/Seawater Applications