Self-humidifying Pt-C/Pt-TiO2 dual-catalyst electrode membrane assembly for proton-exchange membrane fuel cells

Yang, Haoran; Lee, W.H.; Choi, Byung-Uk; Ko, Youngdon; Yi, Sung Chul; Kim, W.J.

doi:10.1016/j.energy.2016.12.054

Cited by 33 publications

(9 citation statements)

References 29 publications

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“…However, with decreasing RH, the dependency of the cell performance on the pH used for the preparation of HTiO 2 becomes more significant; it is 0.67 W/cm 2 at an RH 0% and pH 5.0, 0.59 W/cm 2 at a pH 7.0, and 0.8 W/cm 2 at a pH 9.0. On the basis of the comparison of these results with our previous results, , where the highest power densities of Pt–C/Pt-TiO 2 and Pt–C/Pt-HZrO 2 DCE were 0.68 W/cm 2 and 0.51 W/cm 2 , respectively, the power density of the Pt–C/Pt-HTiO 2 DCE is enhanced by 17.6% and 56.9%, respectively. This suggests that the Pt-HTiO 2 is a feasible DCE for self-humidifying PEMFCs and that the pH is very important for the particle sizes of Pt and TiO 2 , affecting the cell performance, especially at an RH 0%.…”

Section: Resultssupporting

confidence: 70%

“…Another problem of thin Nafion membranes is significant H 2 and O 2 crossover, leading to the deterioration of the fuel cell efficiency. To overcome these problems, Yang et al 16 reported a dual catalyst electrode (DCE) fabricated with Pt/C and Pt/ TiO 2 nanoparticles for self-humidifying PEMFCs. They claimed that the ability of the Pt-TiO 2 catalyst layer on the anode side to produce and retain water is very important for the cell performance under zero RH.…”

Section: ■ Introductionmentioning

confidence: 99%

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Physical and Electrochemical Properties of Pt-Hollow-Structured TiO₂ Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

Kim

2018

ACS Sustainable Chem. Eng.

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In this study, SiO 2 @TiO 2 core−shell nanoparticles were prepared under different pH's such as 5.0, 7.0, and 9.0. Under acidic and neutral conditions, silica nanoparticles are more agglomerated, while less agglomeration occurs under alkaline conditions. The latter case is attributed to repulsive forces between negatively charged silica nanoparticles because of the lack of protons under alkaline conditions. It was also observed that the individual particle size of hollow-structured TiO 2 (HTiO 2 ) is significantly affected by the pH. Below a pH of 7.0, the particle size of TiO 2 is larger than that at pH 9.0 because of the hydrolysis and condensation of titanium tetrabutoxide via the sol−gel process. The smaller the particle sizes of SiO 2 and HTiO 2 are, the larger is the Brunauer−Emmett−Teller (BET) surface area, and the higher are the water uptake and electrochemical active surface area (ECSA). The ECSAs of Pt-HTiO 2 for the water formation were determined to be 19.1, 13.8, and 25.0 m 2 /g, with the increase in pH. The cell performance is similar under high relative humidity. However, under zero humidity, a significant enhancement is observed at pH 9.0 (0.8 W/cm 2 ) compared with 0.67 W/cm 2 for pH 5.0 and 0.59 W/cm 2 for pH 7.0, indicating an excellent self-humidifying ability.

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Section: Resultssupporting

confidence: 70%

Section: ■ Introductionmentioning

confidence: 99%

Physical and Electrochemical Properties of Pt-Hollow-Structured TiO₂ Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

Kim

2018

ACS Sustainable Chem. Eng.

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“…Table 2 shows the performance of the single cells compared to recently published results, demonstrating the superior performance of Pt/C-400. [29,[39][40][41][42][43][44][45][46][47] The findings of the single cell performance test reveal that the Pt/C-400 catalyst performs better.…”

Section: Single Cell Test and Analysismentioning

confidence: 99%

New Facile Continuous Microwave Pipeline Technology for the Preparation of Highly Stable and Active Carbon‐Supported Platinum Catalyst

Feng,

Lu,

Zhang

et al. 2024

ChemElectroChem

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Nowadays, the depletion of non‐renewable energy sources has become a prominent issue, and environmental concerns such as air pollution stemming from vehicle emissions have reached a critical stage. In this manuscript, we introduce a novel approach for the fabrication of Pt/C catalysts on a large scale, utilizing a simple, rapid, and continuous pipeline microwave synthesis method. Moreover, we incorporate a heating treatment process in an N2−H2 (5 % H2) environment to enhance the activity and durability of the catalyst. The synthesized Pt/C‐400 catalyst demonstrates an impressive electrochemical active surface area of 103.2 m2/gpt and a mass‐specific activity of 315 mA/mg at a half‐wave potential of 0.9 V. Following 30000 cycles of Pt attenuation testing and 30000 cycles of carrier attenuation testing, the Pt/C‐400 catalyst exhibits a remarkable retention rate of 75 %. Furthermore, based on single‐cell testing, the Pt/C‐400 catalyst achieves a voltage of 0.606 V at a current density of 2000 mA/cm2, surpassing the performance of other Pt/C catalysts discussed in this article. This study presents an efficient and practical method for large‐scale synthesis of high‐performance and durable catalysts. The findings hold significant implications for the commercialization of Proton Exchange Membrane Fuel Cells and contribute to addressing the pressing need for sustainable energy solutions.

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“…Based on the similar principle, some other additives have also been used to support the Pt particle and achieve self-humidification [48,49,[54][55][56][57][58][59][60][61][62]. The advantages and the related references are listed in Table 2.…”

Section: Changing the Composition Of Electrodementioning

confidence: 99%

Humidification strategy for polymer electrolyte membrane fuel cells – A review

et al. 2018

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Polymer electrolyte membrane fuel cells are promising power sources because of their advantage such as high efficiency, zero emission and low operating temperature. Water management is one of the critical issues for polymer electrolyte membrane fuel cells and has received significant attention. The membrane within the cells needs to stay in hydrated state to have high ion conductivity and durability, which requires proper humidification. Both internal and external methods have been utilized to humidify the polymer electrolyte membrane. Numerous studies on fuel cell humidification have been conducted in the past decades, especially in recent years. This review aims to summarize the main humidification methods and the related studies. The internal humidification methods are classified as physical methods and chemical methods. The external humidification methods include gas bubbling humidification, direct water injection, enthalpy wheel humidification, membrane humidifiers, and exhaust gas recirculation. The working principle and performance of

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Self-humidifying Pt-C/Pt-TiO2 dual-catalyst electrode membrane assembly for proton-exchange membrane fuel cells

Cited by 33 publications

References 29 publications

Physical and Electrochemical Properties of Pt-Hollow-Structured TiO₂ Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

Physical and Electrochemical Properties of Pt-Hollow-Structured TiO₂ Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

New Facile Continuous Microwave Pipeline Technology for the Preparation of Highly Stable and Active Carbon‐Supported Platinum Catalyst

Humidification strategy for polymer electrolyte membrane fuel cells – A review

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Self-humidifying Pt-C/Pt-TiO2 dual-catalyst electrode membrane assembly for proton-exchange membrane fuel cells

Cited by 33 publications

References 29 publications

Physical and Electrochemical Properties of Pt-Hollow-Structured TiO2 Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

Physical and Electrochemical Properties of Pt-Hollow-Structured TiO2 Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

New Facile Continuous Microwave Pipeline Technology for the Preparation of Highly Stable and Active Carbon‐Supported Platinum Catalyst

Humidification strategy for polymer electrolyte membrane fuel cells – A review

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Resources

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Physical and Electrochemical Properties of Pt-Hollow-Structured TiO₂ Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC

Physical and Electrochemical Properties of Pt-Hollow-Structured TiO₂ Prepared at Different pH’s and Its Self-Humidifying Ability in PEMFC