Pt3Y electrocatalyst for oxygen reduction reaction in proton exchange membrane fuel cells

Yoo, Sung Jong; Lee, Kug‐Seung; Hwang, Seung Jun; Cho, Yong‐Hun; Kim, Soo-Kil; Yun, Jeong Woo; Sung, Yung‐Eun; Lim, Tae‐Hoon

doi:10.1016/j.ijhydene.2012.03.089

Cited by 48 publications

(49 citation statements)

References 19 publications

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“…Thicker films with lower roughness factors were found to have slightly higher specific activities than thinner films with higher roughness factors. This is in line with the fact that reports on flat films of Pt 3 Y have much higher specific activity than very rough films of the same composition, which had even lower activity than Pt(bulk).…”

Section: Resultssupporting

confidence: 89%

“…The trend in activity versus composition showed a maximum at Pt 7 Y 3 , which is in reasonable agreement with the maximum we find in this work. We note that the specific activity reported for Pt 7 Y 3 and by the same group also in a later report for Pt 3 Y are extremely high, and higher than what we find in this work. Also, we note that results were reported only for 100 nm thin films, making comparisons of mass activities irrelevant.…”

Section: Resultscontrasting

confidence: 58%

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High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt₃Y

Lindahl

Zamburlini

Feng

et al. 2017

Adv Materials Inter

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Fuel cells have the potential to play an important role in sustainable energy systems, provided that catalysts with higher activity and stability are developed. In this work, it is found that thin alloy films of single‐target cosputtered platinum‐yttrium exhibit up to seven times higher specific activity (13.4 ± 0.4 mA cm−2) for the oxygen reduction reaction (ORR) than polycrystalline platinum, and up to one order of magnitude higher mass activity (3.5 ± 0.3 A mg−1) than platinum nanoparticles. These alloys have the highest reported ORR activity for an as‐deposited material, i.e., without any additional chemical or thermal treatment. The films show an improvement in stability over the same materials in nanoparticulate form. Physical characterization shows that the thin films form a platinum overlayer supported on an underlying alloy. The high activity is likely related to compressive strain in that overlayer. As sputtering can be used to mass‐produce fuel cell electrodes, the results open new possibilities for the preparation of platinum‐rare earth metal alloy catalysts in commercial devices.

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Section: Resultssupporting

confidence: 89%

Section: Resultscontrasting

confidence: 58%

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt₃Y

Lindahl

Zamburlini

Feng

et al. 2017

Adv Materials Inter

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“…reported that bulk alloyed Pt 3 Y with the most stable face‐centered cubic (fcc) alloy is a promising ORR electrocatalyst because each of the two metals in the Pt−Y d bond contributes half of the nine d electrons for Pt (plus one extra from Y) . In agreement with theoretical predictions, the experimentally obtained results for the PtY and Pt 3 Y catalysts indicate extremely high ORR activity and stability among the binary metallic catalysts . However, these PtY and Pt 3 Y alloy catalysts were prepared by using physical metallurgical methods such as magnetron sputtering and cluster beam methods, which entail high costs and difficulty in application for the mass production of catalysts.…”

Section: Introductionsupporting

confidence: 57%

“…Based on the broad XRD patterns for Y(CH 3 COO) 3 ⋅ 4 H 2 O, the products are ascribed to amorphous YO x . The XRD peaks of Pt 3 Y are known to shift to smaller 2 θ angles than Pt peaks . The peak positions in the XRD data of Pt–YO x /C(A):6:2 and Pt–YO x /C(A):5:5 samples agree with those of pure Pt particles, indicating that little Pt x Y alloys are formed.…”

Section: Resultsmentioning

confidence: 62%

“…Consequently, they interfere with proton conduction, resulting in the great reduction of the ORR activity. In general, to obtain sufficient ORR activity from PtM alloy catalysts, the M element content in PtM alloys must be maintained as >20 % . Results show that the PtY catalysts obtained in this work maintain high ORR activity even at low Y contents (0.4–0.9 at %) in PtY alloy catalysts.…”

Section: Resultsmentioning

confidence: 76%

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Synthesis of Carbon‐Supported Pt–YO_x and PtY Nanoparticles with High Catalytic Activity for the Oxygen Reduction Reaction Using a Microwave‐based Polyol Method

et al. 2017

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Carbon‐supported PtY alloy nanoparticles were prepared as oxygen reduction reaction (ORR) catalysts by reducing a mixture of cis‐[Pt(NH3)2(NO2)2] or Pt(C5H7O2)2 and Y(CH3COO)3⋅4 H2O in ethylene glycol (EG) with microwave (MW) heating. Microstructure and composition analyses of products by using TEM, TEM–energy‐dispersive X‐ray spectroscopy (EDS), XRD, X‐ray photoelectron spectroscopy (XPS), and inductively coupled plasma atomic emission spectroscopy (ICP‐AES) data showed that Pt–YOx/C (Y/Pt=0.11–0.75) catalysts involving amorphous yttrium oxide were formed as major products. When the YOx component in the catalysts was removed by using HNO3 treatment, Pt99.1–99.6Y0.4–0.9/C alloy catalysts with low Y contents remained. Higher ORR activity was shown by Pt–YOx/C and PtY/C catalysts than by Pt–Y(OH)3/C, Pt–YOx/C, or PtY/C catalysts prepared by using other conventional chemical reduction methods and thermal treatment methods under a H2/Ar or Ar atmosphere. The mass activity (MA) and surface specific activity (SA) of the best Pt99.5Y0.5/C catalyst, MA=245 A gPt−1 and SA=711 μA cmPt−2, were equal to or higher than those of the commercially used Pt86Co14/C catalyst, MA=245 A gPt−1 and SA=512 μA cmPt−2. The major reasons for the high ORR activity of these Pt–YOx/C and PtY catalysts are discussed. These Pt99.1–99.6Y0.4–0.9/C alloy catalysts prepared by using acid treatment are new and promising catalysts for use in proton exchange membrane fuel cells (PEMFCs).

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Dynamic Locking of Interfacial Side Reaction Sites Promotes Aluminum‐Air Batteries Close to Theoretical Capacity

Huang

Fang

et al. 2021

Advanced Sustainable Systems

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Aluminum metal has been regarded as a promising anode material for aqueous metal‐air batteries. However, the stable cycling of Al anodes is challenging due to the severe parasitic corrosion of Al metal in alkaline electrolytes. Here, a novel additive, n‐octylphosphonic acid (OPA), is introduced into the typical NaOH electrolyte system to improve the interfacial stability of Al anodes and thus promote high‐performance Al‐air batteries (AABs). Combining several experimental characterizations and theoretical calculation, it is proved that OPA molecules in an NaOH aqueous environment can modify the Al anode/electrolyte interface and alter the stacking of the discharge product. The electrolyte engineering is capable of anchoring dynamically to restrain side reactions through hydrogen bonds (H···O), homogenizing the dissolution of Al metal and avoiding precipitation agglomeration. As a proof of concept, AABs full cells with an electrolyte containing OPA achieve higher potential plateau and discharge capacity than those with a pure NaOH electrolyte. It paves a way to develop highly‐efficient and eco‐friendly electrolyte additive strategies for high‐performance AABs devices and advance the current understanding of organic additive mechanisms in AABs.

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Pt3Y electrocatalyst for oxygen reduction reaction in proton exchange membrane fuel cells

Cited by 48 publications

References 19 publications

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt₃Y

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt₃Y

Synthesis of Carbon‐Supported Pt–YO_x and PtY Nanoparticles with High Catalytic Activity for the Oxygen Reduction Reaction Using a Microwave‐based Polyol Method

Dynamic Locking of Interfacial Side Reaction Sites Promotes Aluminum‐Air Batteries Close to Theoretical Capacity

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Pt3Y electrocatalyst for oxygen reduction reaction in proton exchange membrane fuel cells

Cited by 48 publications

References 19 publications

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt3Y

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt3Y

Synthesis of Carbon‐Supported Pt–YOx and PtY Nanoparticles with High Catalytic Activity for the Oxygen Reduction Reaction Using a Microwave‐based Polyol Method

Dynamic Locking of Interfacial Side Reaction Sites Promotes Aluminum‐Air Batteries Close to Theoretical Capacity

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Resources

About

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt₃Y

High Specific and Mass Activity for the Oxygen Reduction Reaction for Thin Film Catalysts of Sputtered Pt₃Y

Synthesis of Carbon‐Supported Pt–YO_x and PtY Nanoparticles with High Catalytic Activity for the Oxygen Reduction Reaction Using a Microwave‐based Polyol Method