Structural parameters of supported fuel cell catalysts: The effect of particle size, inter-particle distance and metal loading on catalytic activity and fuel cell performance

Antolini, Ermete

doi:10.1016/j.apcatb.2015.08.007

Cited by 174 publications

(146 citation statements)

References 98 publications

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“…Many researchers have focused on the development of new Pt alloy catalysts and have paid attention to the control of particle size and Pt-Pt particle distance. [7][8][9] Our group confirmed that the effectiveness of Pt in catalyst layers (CLs) was only on the order of 7.5% under practical operating conditions (air, 65…”

mentioning

confidence: 49%

Improvement of Cell Performance in Low-Pt-Loading PEFC Cathode Catalyst Layers Prepared by the Electrospray Method

Takahashi

Kakinuma

Uchida

2016

J. Electrochem. Soc.

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The reduction of Pt loading in cathode catalysts is an important subject for developing polymer electrolyte fuel cells. In order to solve this problem without sacrificing performance, we prepared a uniform catalyst-coated membrane (CCM) by an electrospray (ES) method with a low Pt loading, 0.05 mg Pt cm −2 , which is one-tenth of the typical cathode Pt loading. The ES process has several advantages for the fabrication of thin catalyst layers (CLs), such as smaller droplets and accurate position control, compared with the pulse-swirl-spray (PSS) method. Highly uniform CLs were evaluated by use of a standard evaluation cell (area 29.2 cm 2 ). The ES method makes it possible to control precisely the coating area and reduce the losses of the catalyst ink. CLs cross sections prepared by focused ion beam milling indicated that the total occupation fraction of the pores in the CLs prepared by the ES method was about twice as large as that for the PSS method. The ES method improved the ionomer coverage, led to increased electrochemically active surface area, and constructed more porous CLs. The highly porous CLs prepared by the ES method contributed to the improvement of the cell performance.

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mentioning

confidence: 49%

Improvement of Cell Performance in Low-Pt-Loading PEFC Cathode Catalyst Layers Prepared by the Electrospray Method

Takahashi

Kakinuma

Uchida

2016

J. Electrochem. Soc.

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“…The utilization of platinum as cathode catalyst sounds completely inappropriate for a technology in which the power output is extremely low and the containment of costs is one of the primary goals. Cathodes based on platinum catalysts were heavily used in MFCs, mainly initially, since those materials were inherited by the more mature acidic and alkaline fuel cells technology in which high power densities justify the utilization of precious metals [34], [35]. Other than be considerably expensive and a rare metal, platinum has other undesirable properties when used in MFCs.…”

Section: Introductionmentioning

confidence: 99%

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

Kodali

Santoro

Herrera

et al. 2017

Journal of Power Sources

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M1-M2-N-C bimetallic catalysts with M1 as Fe and Co and M2 as Fe, Co, Ni and Mn were synthesized and investigated as cathode catalysts for oxygen reduction reaction (ORR). The catalysts were prepared by Sacrificial Support Method in which silica was the template and aminoantipyrine (AAPyr) was the organic precursor. The electro-catalytic properties of these catalysts were investigated by using rotating ring disk (RRDE) electrode setup in neutral electrolyte. Fe-Mn-AAPyr outperformed Fe-AAPyr that showed higher performances compared to Fe-Co-AAPyr and Fe-Ni-AAPyr in terms of half-wave potential. In parallel, Fe-Co-AAPyr, Co-Mn-AAPyr and Co-Ni-AAPyr outperformed Co-AAPyr. The presence of Co within the catalyst contributed to high peroxide production not desired for efficient ORR. The catalytic capability of the catalysts integrated in air-breathing cathode was also verified. It was found that Co-based catalysts showed an improvement in performance by the addition of second metal compared to simple Co- AAPyr. Fe-based bimetallic materials didn't show improvement compared to Fe-AAPyr with the exception of Fe-Mn-AAPyr catalyst that had the highest performance recorded in this study with maximum power density of 221.8 ± 6.6 μWcm−2. Activated carbon (AC) was used as control and had the lowest performances in RRDE and achieved only 95.6 ± 5.8 μWcm−2 when tested in MFC.

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“…[29] After calcination, all diffraction peaks are well matched to the standard tetragonal Mn 3 O 4 (Mn 3 O 4 in Figure 1a, JCPDS No. [32] The optimum in catalytic activity for MEOR is obtained with Pt particles' size in the range of ca. Additionally, the diffraction peaks of the Mn 3 O 4 become narrower and sharper than those of the MnO 2 , implying superior crystallinity.…”

Section: Resultsmentioning

confidence: 99%

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn₃O₄ for Methanol Electrooxidation

Zhong

Xiong

et al. 2018

ChemCatChem

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The interaction between precious metal nanoparticles and the support plays an important role in improving poisoning tolerance of Pt-based catalysts and thus maintaining their activity and stability. Here, a dendrite-like Mn 3 O 4 was fabricated and used as a support for Pt nanoparticles towards the methanol electrooxidation reaction. The nanoparticles were deposited chemically on surfaces of the dendritic Mn 3 O 4 , which was prepared through calcination of MnO 2 hollow micro-spheres. The Mn 3 O 4 support not only provided an appropriate base for the formation of nanosized and homogeneous platinum particles (about 2.6 nm in size), but also increased Pt 0 binding energy owing to a strong electronic interaction. By combining the advantages of the small-size, fine dispersion and enhanced binding energy of Pt nanoparticles, the Pt/Mn 3 O 4 composite exhibited enhanced catalytic activity, poisoning tolerance and stability for methanol electrooxidation.[a] Dr.

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Structural parameters of supported fuel cell catalysts: The effect of particle size, inter-particle distance and metal loading on catalytic activity and fuel cell performance

Cited by 174 publications

References 98 publications

Improvement of Cell Performance in Low-Pt-Loading PEFC Cathode Catalyst Layers Prepared by the Electrospray Method

Improvement of Cell Performance in Low-Pt-Loading PEFC Cathode Catalyst Layers Prepared by the Electrospray Method

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn₃O₄ for Methanol Electrooxidation

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Structural parameters of supported fuel cell catalysts: The effect of particle size, inter-particle distance and metal loading on catalytic activity and fuel cell performance

Cited by 174 publications

References 98 publications

Improvement of Cell Performance in Low-Pt-Loading PEFC Cathode Catalyst Layers Prepared by the Electrospray Method

Improvement of Cell Performance in Low-Pt-Loading PEFC Cathode Catalyst Layers Prepared by the Electrospray Method

Bimetallic platinum group metal-free catalysts for high power generating microbial fuel cells

On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn3O4 for Methanol Electrooxidation

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On the Origin of the Enhanced Performance of Pt/Dendrite‐like Mn₃O₄ for Methanol Electrooxidation