Ionic liquid modified Pt/C electrocatalysts for cathode application in proton exchange membrane fuel cells

Zhang, Huixin; Liang, Jinying; Xia, Bangwang; Li, Yang; Du, Shangfeng

doi:10.1007/s11705-019-1838-8

Cited by 34 publications

(32 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[ 12,13,32,73 ] IL modification of a commercial Pt/C catalyst in PEMFCs confirmed that the presence of the IL can induce a significant increase in activity. [ 12 ] Modification of the pristine catalyst with 2% IL increased the peak power density from 0.34 to 0.61 W cm −2 (Figure 7a). [ 12 ] Zhang et al did also study the effect of IL loading, observing the typical maximum behavior of activity as a function of IL coverage.…”

Section: Solid Catalysts With An Il Layermentioning

confidence: 94%

“…Later on, synthetic procedures have been introduced that allow for controlled and smaller loading of ILs. They consist of the dilution of the catalyst and the desired amount of IL in isopropanol, [ 13,29,31,13–13 ] ethanol, [ 12 ] or ethanol/water mixtures, [ 33 ] generally followed by mixing, sonication, and evaporation. Du and coworkers utilized 10 min sonication, followed by 3 h of magnetic stirring, partial solvent evaporation by vacuum desiccation, and centrifugation to isolate the catalyst.…”

Section: Solid Catalysts With An Il Layermentioning

confidence: 99%

“…Du and coworkers utilized 10 min sonication, followed by 3 h of magnetic stirring, partial solvent evaporation by vacuum desiccation, and centrifugation to isolate the catalyst. [ 12 ]…”

Section: Solid Catalysts With An Il Layermentioning

confidence: 99%

“…Zhang et al have studied the effect of the solvent, testing ethanol, and isopropanol as suspension media for the mixture and showed that the ethanol‐synthesized catalyst significantly outperformed its isopropanol counterpart. [ 12 ] This phenomenon is suggested to result from the stronger polarity and H‐bonding of ethanol, which impacts the solubility and mobility of the IL. This simple experiment highlights how much the synthetic pathway can impact the activity of the final catalyst and how the comparison of results from different papers is not trivial.…”

Section: Solid Catalysts With An Il Layermentioning

confidence: 99%

“…In red is the polarization curve of a O 2 /H 2 PEMFC, with Pt/C and Pt/C+2% [MTBD][NTF2] as cathode catalyst and Pt/C as anode catalyst, both at a loading of 0.4 mg Pt cm −2 . [ 12 ] These data were obtained at 80 °C, with fully humidified gases at 1.5 bar and H 2 /O 2 stoichiometry=2/9.5. In green are data obtained in air/H 2 single/cell PEMFC at 80 °C, using ZnCoN/C and ZnCoN/C + 20 wt% [BMIM][NTF2] as cathode catalyst at a loading of

2 {mg}_{ZnCoNC} c {normalm}^{- 2}

and Pt as an anode catalyst at a loading of 0.4 mg Pt cm −2 .…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Engineering the Electrochemical Interface of Oxygen Reduction Electrocatalysts with Ionic Liquids: A Review

Favero

Stephens

Titirici

2020

Adv Energy and Sustain Res

View full text Add to dashboard Cite

Hydrogen fuel cells are a promising technology for the environmentally sustainable production of electricity. However, their commercialization is hindered by the sluggish kinetics of the oxygen reduction reaction and by the high cost of the state‐of‐the‐art platinum catalysts. To address these challenges, research has focused on the enhancement of the activity of platinum and platinum group metal (PGM)‐free electrocatalysts, by modifying their composition and topology. Recently, a new approach has emerged to boost the activity of ORR catalysts, based on engineering the electrochemical interface. Herein, the recent developments in the use of ionic liquids (ILs) to modify the triple‐point interface of ORR catalysts are summarized. In this review, the current understanding in the literature of the effect of IL layers is presented, along with the open questions and remaining challenges. A short perspective on the applicability of this simple and effective modification to other electrochemical reactions is discussed.

show abstract

Section: Solid Catalysts With An Il Layermentioning

confidence: 94%

Section: Solid Catalysts With An Il Layermentioning

confidence: 99%

“…Du and coworkers utilized 10 min sonication, followed by 3 h of magnetic stirring, partial solvent evaporation by vacuum desiccation, and centrifugation to isolate the catalyst. [ 12 ]…”

Section: Solid Catalysts With An Il Layermentioning

confidence: 99%

Section: Solid Catalysts With An Il Layermentioning

confidence: 99%

2 {mg}_{ZnCoNC} c {normalm}^{- 2}

and Pt as an anode catalyst at a loading of 0.4 mg Pt cm −2 .…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Engineering the Electrochemical Interface of Oxygen Reduction Electrocatalysts with Ionic Liquids: A Review

Favero

Stephens

Titirici

2020

Adv Energy and Sustain Res

View full text Add to dashboard Cite

show abstract

Emerging Applications of Solid Catalysts with Ionic Liquid Layer Concept in Electrocatalysis

Zhang

Etzold

2021

Adv Funct Materials

View full text Add to dashboard Cite

The concept of solid catalysts with ionic liquid layer (SCILL) originates from the field of heterogeneous catalysis, where it offers a unique way to regulate both the catalytic activity and selectivity. In recent years, applying this concept in electrocatalysis represented a new, exciting, and growing research field. Herein, emerging applications of the SCILL concept in the context of electrocatalysis for key energy storage/conversion processes such as oxygen reduction, oxygen evolution, and CO2 reduction reactions are comprehensively reviewed. Alongside case studies highlighting the history, development and latest progress of the SCILL concept, mechanistic underpinnings on the roles of ILs in each application are critically discussed. At the same time, the key challenges and future opportunities in fully leveraging the SCILL concept for either regulating the performance of electrocatalysts or gaining mechanistic understandings for those electrocatalytic processes with complex reaction pathways are outlined.

show abstract

Upgrading the State‐of‐the‐Art Electrocatalysts for Proton Exchange Membrane Fuel Cell Applications

Fang

Daniel²,

Bonakdarpour

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

cell technologies has been hindered by a number of technical challenges, including the sluggish kinetics of the oxygen reduction reaction (ORR) at the cathode, [9][10][11][12][13][14] components' stability during long-term operation, [15,16] and the poisoning of the electrocatalyst with ethanol and CO fuels at the anode, e.g., as in the case of DMFCs. [17] Pt-based electrocatalysts with various compositions, facets, and morphologies have been explored to enhance the electrocatalytic activity towards the ORR. [18][19][20][21][22][23][24] In parallel, the development of catalyst support materials has also been critical in the overall development of Pt-based and other precious metal-based electrocatalysts and in the reduction of the metal catalyst loadings. Among the many support materials in use, carbon black Vulcan XC-72R (denoted as VC) has been reported to significantly improve the electrocatalytic activity towards the ORR of the supported Pt-based electrocatalysts and cell performance of PEMFCs, and is, therefore, a widely used support material for the commercial Pt-based electrocatalysts. [25][26][27][28] Among supported Pt-based electrocatalysts, carbon-supported Pt nanoparticles (NPs) are the most frequently investigated, [29,30] and one example is the commercial Pt(20 wt%)NPs/VC (Johnson Matthey) which represents the state-of-the-art electrocatalyst for low-temperature fuel cell applications. [1][2][3] Although this catalyst has demonstrated high activities in many electrocatalytic applications, its stability deteriorates during long-term electrochemical operation and this mainly results from the corrosion of the support material (i.e., VC) and the agglomeration or loss of the supported Pt NPs. When higher Pt contents (i.e., 40 or 60 wt%) are used in the catalyst layer, the stability is exacerbated because the Pt NPs in these high Pt content catalysts have a larger grain size than the Pt(20 wt%)NPs/VC catalyst, resulting in an uneven distribution and agglomeration. [1] Therefore, it is particularly important to modify VC-supported Pt-based catalysts for improved durability.To improve the long-term electrochemical stability of supported Pt-based electrocatalysts, various strategies have been developed, including the use of modified carbon support materials, [16] non-carbon catalyst supports, [15] a core-protected platinum monolayer shell, [14] and coplanar Pt/C nanomeshes, [13] etc. In addition, an ultrathin N-doped carbon shell formed in situ on PtFe NPs has been shown to be effective in Carbon-supported Pt-based electrocatalysts have been widely investigated for diverse electrochemical energy storage and conversion applications. Vulcan XC72R (VC) supported Pt(20 wt%) nanoparticles (NPs) (denoted as Pt(20 wt%)NPs/VC produced by Johnson Matthey (JM)) is the most commonly-used catalyst and is thus widely considered to be the state-of-theart electrocatalyst. Although Pt(20 wt%)NPs/VC(JM) has demonstrated very good electrocatalytic performance in these applications, further improvement in its electrocatalytic a...

show abstract

Ionic liquid modified Pt/C electrocatalysts for cathode application in proton exchange membrane fuel cells

Cited by 34 publications

References 23 publications

Engineering the Electrochemical Interface of Oxygen Reduction Electrocatalysts with Ionic Liquids: A Review

Engineering the Electrochemical Interface of Oxygen Reduction Electrocatalysts with Ionic Liquids: A Review

Emerging Applications of Solid Catalysts with Ionic Liquid Layer Concept in Electrocatalysis

Upgrading the State‐of‐the‐Art Electrocatalysts for Proton Exchange Membrane Fuel Cell Applications

Contact Info

Product

Resources

About