Activities of Pt/Sibunit-1562 catalysts in the ORR in PEMFC: Effect of Pt content and Pt load at cathode

Грибов, Е. Н.; Zinovieva, Anastasiya Yu.; Voropaev, I. N.; Simonov, P.A.; Романенко, А. С.; Okunev, A. G.

doi:10.1016/j.ijhydene.2012.05.055

Cited by 19 publications

(5 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pt loading on the anode was 0.2 mg Pt cm −2 . Pt and Vulcan XC-72 loading on the cathode was 0.1 mg Pt cm −2 and 0.6 mg cm −2 , as it was reported in [43]. The addition of carbon support to the electrode can improve significantly the performance of the MEA, as was pointed out in [43].…”

Section: Fuel Cellsupporting

confidence: 59%

“…Generally, for Pt/C catalyst with a spherical shape of Pt nanoparticles, the average volumesurface diameter (d s) of platinum crystallites can be calculated using the formula d s GPT (nm) = 1.08/D Pt [41]. This method was described in the literature [41,42] and used for Pt dispersion determination in Pt/C catalysts [39,40,43]. The relative errors were 10%.…”

Section: Physico-chemical Characterizationsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of modification of multi-walled carbon nanotubes with nitrogen-containing polymers on the electrochemical performance of Pt/CNT catalysts in PEMFC

Грибов

Kuznetsov

Golovin

et al. 2019

Mater Renew Sustain Energy

View full text Add to dashboard Cite

The influence of the surface modification of multi-walled carbon nanotubes (MWCNT) with nitrogen-containing compounds on the performance of 40 wt% Pt/MWCNT catalysts in the oxygen electroreduction reaction (ORR) was investigated using a rotating disk electrode (RDE) at 10-35 °C in 0.1 M HClO 4 as electrolyte in electrochemical cell, and in a hydrogen-oxygen polymer electrolyte membrane fuel cell (PEMFC) at 82 °C. The catalysts were characterized by low-temperature nitrogen adsorption, XPS, TEM, gas-phase CO titration, electrooxidation of the adsorbed CO monolayer, and cyclic voltammetry. It was shown that the modification of MWCNT with melamine-formaldehyde resin leads to the surface nitrogen concentration up to 8.3 at.% (CNT-MF sample). The 40 wt% Pt/CNT-MF catalyst with 0.1 mg cm −2 Pt loading on the cathode showed a good performance in PEMFC (~ 0.61 W cm −2) and a high utilization ratio (0.84) of Pt in membrane electrode assembly as compared to Pt/CNT catalyst (~ 0.37 W cm −2 and utilization of 0.29). The higher power density of nitrogen-modified catalysts was ascribed to a higher utilization of Pt in the electrode layer.

show abstract

Section: Fuel Cellsupporting

confidence: 59%

Section: Physico-chemical Characterizationsmentioning

confidence: 99%

Effect of modification of multi-walled carbon nanotubes with nitrogen-containing polymers on the electrochemical performance of Pt/CNT catalysts in PEMFC

Грибов

Kuznetsov

Golovin

et al. 2019

Mater Renew Sustain Energy

View full text Add to dashboard Cite

show abstract

“…The highest current peak among the three various catalysts is observed with the 20% metal loading. Only at lower metal loadings will the catalytic activity be the most effective because at higher metal loadings, a possible spillover of hydrogen on the carbon support could be obtained [17]. Therefore, the trend coincides with what was shown in the linear sweep voltammogram.…”

Section: Effect Of Varying the Metal Loading Of Ptco/csupporting

confidence: 82%

Non-pyrolyzed cobalt-porphyrin cathode catalyst on carbon support as an efficient electrocatalyst for oxygen reduction reaction in basic medium

Cac¹,

Mendoza²,

Tongol³

2017

actamanil

View full text Add to dashboard Cite

Owing to their high energy efficiency, reduced pollution, and minimal maintenance cost, fuel cells have been regarded as one of the most promising energy conversion devices. The commonly used effective electrocatalysts are platinum-based materials. The development of fuel cell electrodes with non-noble metal catalysts to lessen the use of Pt-based materials has been the focus of this study. The cathode catalysts were synthesized using the sodium borohydride reduction method. Catalyst inks were prepared and subjected to electrochemical characterization that included linear sweep voltammetry (LSV) and cyclic voltammetry (CV). Optimization of the metal loading and metal salt shows that the non-precious metal catalyst, 20% cobalt porphyrin (2,3,7,8,12,13,17,18-Octaethyl-21H, 23H-porphine cobalt (II)) supported on carbon black (CoP/C), gave the highest catalytic activity having a current density of 2.23 mA cm -2 compared to the commercially available 20% Pt/C (Premetek, USA) (1.46 mA cm -2 ) in basic medium. The retained current for the CoP/C was 58.15% while for the 20% Pt/C catalyst (Premetek (USA), it was 21.23%. The electrochemical impedance spectroscopy (EIS) showed enhanced electron transfer kinetics for CoP/C than the commercially available 20% Pt/C (Premetek, USA). The morphological and surface characterization were obtained using scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) analysis that confirmed the ~20% metal loading of the catalyst.

show abstract

“…As can be seen in Figure 5A, PEMFC shows the best performance with lowest fluctuation at 70°C. The reasons for this situation are owing to the following two aspects: on one hand, the catalyst has a better activity at an elevated operation temperature 30,31 ; on the other hand, larger temperature gradient generates between the reaction area and the condensation region. Thus, the condensation rate of water vapor inside the stack increases at higher operation temperature, which decreases the water accumulation of PEMFC.…”

Section: Resultsmentioning

confidence: 99%

Effect of inner dehumidification technique on the performance of a dead‐ended proton exchange membrane fuel cell stack

Pei

Song

Wang

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Water management is important for proton exchange membrane fuel cell (PEMFC). To maintain highly efficient and stable operation of PEMFC, water generated in PEMFC needs to be migrated in time. An inner dehumidification technique is proposed to remove the water inside the PEMFC stack. Two inner condensing units are set near the cathode outlet to cooling the moisture gas. Water vapor in the flow channel will transfer directly to the outlet to supplement the vapor loss due to condensing. As a consequence, water flooding is sufficiently mitigated inside PEMFC. The experimental results show that the output voltage of the dead‐ended fuel cell stack increases by 9.77% at 1000 mA∙cm−2 when the condensing temperatures is 5°C. When the condensing temperature decreases from 20°C to 5°C, the average stack voltage can be increased by 14.3% at 500 mA∙cm−2, and the average temperature difference decreases from 3.2°C to 1.8°C. Moreover, the performance and temperature distribution uniformity are all increased with the increasing of the operation temperature due to inner moisture dehumidification.

show abstract

Activities of Pt/Sibunit-1562 catalysts in the ORR in PEMFC: Effect of Pt content and Pt load at cathode

Cited by 19 publications

References 58 publications

Effect of modification of multi-walled carbon nanotubes with nitrogen-containing polymers on the electrochemical performance of Pt/CNT catalysts in PEMFC

Effect of modification of multi-walled carbon nanotubes with nitrogen-containing polymers on the electrochemical performance of Pt/CNT catalysts in PEMFC

Non-pyrolyzed cobalt-porphyrin cathode catalyst on carbon support as an efficient electrocatalyst for oxygen reduction reaction in basic medium

Effect of inner dehumidification technique on the performance of a dead‐ended proton exchange membrane fuel cell stack

Contact Info

Product

Resources

About