Evidence of Nonelectrochemical Shift Reaction on a CO-Tolerant High-Entropy State Pt–Ru Anode Catalyst for Reliable and Efficient Residential Fuel Cell Systems

Takeguchi, Tatsuya; Yamanaka, Toshiro; Asakura, Kiyotaka; Muhamad, Ernee Noryana; Uosaki, Kohei; Ueda, Wataru

doi:10.1021/ja304939q

Cited by 67 publications

(54 citation statements)

References 24 publications

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“…[128, The improvement of PtRu nanoparticles is one of the most promising roads to obtaining the highly tolerant anode catalysts. [147] A MEA using the anode catalyst exhibits higher performance than that with conventional PtRu catalysts in the presence of a high concentration of CO (Figure 20). [147] A MEA using the anode catalyst exhibits higher performance than that with conventional PtRu catalysts in the presence of a high concentration of CO (Figure 20).…”

Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Electrocatalysts for PEM Fuel Cells

Ioroi

Siroma

Yamazaki

et al. 2018

Advanced Energy Materials

151

115

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Degradation phenomena of electrocatalysts for proton‐exchange membrane fuel cells and their mechanisms are reviewed. Platinum dissolution and redeposition, carbon‐support corrosion, inhomogeneity during start‐up and cell reversal are discussed as factors that influence the degradation of electrocatalysts with relation to electrode potential. Early research findings at the National Institute of Advanced Industrial Science and Technology (AIST), Japan, are mainly used as a basis of discussion. The development of highly durable electrocatalysts using an oxide support based on the results of degradation studies to suppress electrocatalyst degradation is summarized with a main focus on Pt‐deposited Ti4O7 catalysts developed at AIST. The development of high‐CO‐concentration durable anode electrocatalysts is also reviewed. In particular, an electrocatalyst that uses an organic complex as a co‐electrocatalyst with a platinum ruthenium alloy anode electrocatalyst developed at AIST is included as a novel high‐CO‐concentration durable anode electrocatalyst.

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Section: Wwwadvancedsciencenewscommentioning

confidence: 99%

Electrocatalysts for PEM Fuel Cells

Ioroi

Siroma

Yamazaki

et al. 2018

Advanced Energy Materials

151

115

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“…As a whole tendency, top surface contains Pt sufficiency and 2 nd layer contains Ru sufficiency make the structure stable. In the Pt-Ru alloy, Pt-Ru bonding is important factor to remove CO on the Pt in order to achieve high CO tolerance [11]. We investigated that the dependence of Pt-Ru bond ratio with the ratio of surface atom as well as cluster size.…”

Section: Resultsmentioning

confidence: 99%

Stability of Pt-Ru Alloy for Anode Catalyst in PEFC Fuel Cell: A Density Functional Theory Study

Alam

Takaba

2014

ECS Trans.

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It is well known that Pt-Ru alloy exhibits a promising catalytic activity for fuel cells. In this work we present density functional theory (DFT) study of the randomly mixed Pt-Ru alloys and discussed its stability based on the relative position of Pt and Ru atoms. The structures are modelled as five layer slabs because the ratio of surface atoms comparable with that for clusters about 3 nm sizes. The top surface fully covered by the Pt atom exhibits highest stability compared with other randomly mixed Pt-Ru alloys. We also discuss here the probability of Pt-Ru bond ratio (M Pt-Ru /M PtRu +M Pt-Pt ) in the Pt-Ru alloy decreases with increasing the surface atom ratio (surface atom/Total number of atom), which is compared with available X-ray absorption fine structure data.

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“…We have performed the periodic slab calculations by considering the (111) surface of Pt 2 Ru 3 alloys as being ordered face-centered cubic (fcc). The reason for choosing this composition was to reproduce with recent experimental reports (24,25). The adsorption energies for each adsorbate at various sites on pure Pt surface, Pt 2 Ru 3 surface for different combination of Pt and Ru, pure Ru surface are listed in Table I and Table II.…”

Section: Resultsmentioning

confidence: 99%

Density Functional Theory Study of OH and CO Adsorption on the Pt₂Ru₃ Surface

Alam

Takaba

2014

ECS Trans.

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In this work, we present results of periodic density functional theory study of the adsorption of carbon monoxide (CO) and hydroxyl (OH) on Pt 2 Ru 3 alloy surface for different conformation of Pt and Ru. These results were compared with CO and OH adsorption on pure Pt and Ru surfaces. We find that the mixing of Pt by Ru leads to stronger bond of CO and OH to the Ru sites, whereas weaker bond notice of CO and OH to the Pt sites. We also analyze the effect of surface, sub surface and neighboring atoms effect on the adsorption of CO and OH on the Pt 2 Ru 3 alloy surface. We notice that surface mixture with Pt and Ru atoms is more favourable adsorption sites for CO and OH than that of the homogeneous alloy surfaces.

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Evidence of Nonelectrochemical Shift Reaction on a CO-Tolerant High-Entropy State Pt–Ru Anode Catalyst for Reliable and Efficient Residential Fuel Cell Systems

Cited by 67 publications

References 24 publications

Electrocatalysts for PEM Fuel Cells

Electrocatalysts for PEM Fuel Cells

Stability of Pt-Ru Alloy for Anode Catalyst in PEFC Fuel Cell: A Density Functional Theory Study

Density Functional Theory Study of OH and CO Adsorption on the Pt₂Ru₃ Surface

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Evidence of Nonelectrochemical Shift Reaction on a CO-Tolerant High-Entropy State Pt–Ru Anode Catalyst for Reliable and Efficient Residential Fuel Cell Systems

Cited by 67 publications

References 24 publications

Electrocatalysts for PEM Fuel Cells

Electrocatalysts for PEM Fuel Cells

Stability of Pt-Ru Alloy for Anode Catalyst in PEFC Fuel Cell: A Density Functional Theory Study

Density Functional Theory Study of OH and CO Adsorption on the Pt2Ru3 Surface

Contact Info

Product

Resources

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Density Functional Theory Study of OH and CO Adsorption on the Pt₂Ru₃ Surface