Pt-coated Pd nanocubes as catalysts for alkaline oxygen reduction activity

Lee, Chien‐Liang; Yang, Chia-Chen; Liu, Chia-Ru; Liu, Zhe-Ting; Ye, Jyun-Sian

doi:10.1016/j.jpowsour.2014.06.112

Cited by 25 publications

(15 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Several research groups have prepared core‐shell type Pd−Pt catalysts . Pt monolayer‐decorated Pd nanoparticles showed higher ORR activity and stability than Pt/C catalysts .…”

Section: Introductionmentioning

confidence: 99%

Electroreduction of Oxygen on PdPt Alloy Nanocubes in Alkaline and Acidic Media

et al. 2017

View full text Add to dashboard Cite

The electrochemical kinetic behavior of the oxygen reduction reaction (ORR) on PdPt alloy nanocubes of various compositions is investigated in 0.1 M KOH and 0.1 M HClO4 solutions, adopting the rotating disk electrode (RDE) configuration. The PdPt nanocubes are prepared in the presence of polyvinylpyrrolidone and identified by using transmission electron microscopy (TEM). TEM images reveal that the PdPt alloy nanoparticles have a preferential cubic shape and the average particle size is approximately 8–10 nm. CO‐stripping and cyclic voltammetry (CV) experiments are used for electrochemical cleaning and characterization of metal nanoparticles. The CV responses indicate alloy formation. In acidic media, Pd36Pt64 shows the highest specific activity (SA) for the ORR from the alloyed catalysts studied, but this activity is similar to that found with Pt and Pd nanocubes. However, in alkaline solution, the SA value for Pd72Pt28 is about two times higher than that of Pd and Pt nanocubes. The mechanistic pathway of O2 reduction on PdPt alloy nanocubes is analogous to that of pure Pd and Pt catalysts and the ORR proceeds via a 4‐electron pathway in both electrolyte solutions.

show abstract

“…Several research groups have prepared core‐shell type Pd−Pt catalysts . Pt monolayer‐decorated Pd nanoparticles showed higher ORR activity and stability than Pt/C catalysts .…”

Section: Introductionmentioning

confidence: 99%

Electroreduction of Oxygen on PdPt Alloy Nanocubes in Alkaline and Acidic Media

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Consequently, it is essential to optimize the ORR performances of Pd-Zr alloy electrocatalysts by engineering their morphology with simple and scaled preparation route. At present, great efforts have been devoted to developing ORR nanocatalysts with various morphologies, such as nanowires [26], nanotubes [27], and "core−shell" nanoparticles [28] etc. These nanocatalysts are usually synthesized by chemical reduction methods.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous PdZr surface alloy as highly active non–platinum electrocatalyst toward oxygen reduction reaction with unique structure stability and methanol–tolerance

Duan

2016

Journal of Power Sources

View full text Add to dashboard Cite

Nanoporous (NP) PdZr alloy with controllable bimetallic ratio is successfully fabricated by a simple dealloying method. By leaching out the more reactive Al from PdZrAl precursor alloy, NP-PdZr alloy with smaller ligament size was generated, characterized by the nanoscaled interconnected network skeleton and hollow channels extending in all three dimensions. Upon voltammetric scan in acid solution, the dissolution of surface Zr atoms generates the highly active Pd-Zr surface alloy with a nearly pure Pd surface and Pd-Zr alloy core. The NP-Pd 80 Zr 20 surface alloy exhibits markedly enhanced specific and mass activities as well as higher catalytic stability toward oxygen reduction reaction (ORR) compared with NP-Pd and the state-of-the-art Pt/C catalysts. In addition, the NP-Pd 80 Zr 20 surface alloy shows a better selectivity for ORR than methanol in the 0.1 M HClO 4 and 0.1 M methanol mixed solution. X-ray photoelectron spectroscopy and density functional theory calculations both demonstrate that the weakened Pd-O bond and improved ORR

show abstract

“…Controlling the shape and facets of nanocrystals is an effective way to enhance the performance in catalytic reactions [5][6][7][8]. Recently, several researches have been aimed towards the electrocatalytic studies of shape-controlled Pt-Pd alloy nanocrystals [3,[5][6][7][8][9][10][11][12][13][14][15]. Hong et al synthesised Pd-Pt alloys with hollow nanostructures and studied the electrocatalysis of the ORR on these materials [3].…”

Section: Introductionmentioning

confidence: 99%

“…Lee et al studied the reduction of O 2 on Pt-coated Pd nanocubes in alkaline solution and concluded that the core-shell nanocubes showed 2.6 times higher specific activity than Pt nanoparticles [14].…”

Section: Introductionmentioning

confidence: 99%

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

Jukk

Kongi

Tammeveski

et al. 2015

Electrochemistry Communications

View full text Add to dashboard Cite

In this work, PdPt alloy nanocubes with different metal ratios were synthesised in the presence of polyvinylpyrrolidone (PVP). The surface morphology of the PdPt samples was characterised by transmission electron microscopy (TEM). TEM images showed that PdPt nanoparticles were cubic-shaped and the average size of the cubes was about 8-10 nm. Their electrocatalytic activity towards the oxygen reduction reaction (ORR) was studied in 0.5 M H 2 SO 4 using the rotating disk electrode method. All the alloyed catalysts showed enhanced electrocatalytic activity for ORR as compared to the monometallic cubic Pd nanoparticles.Half-wave potential values for PdPt catalysts were comparable with that of Pt nanocubes.From the alloyed catalysts Pd 36 Pt 64 exhibited the highest specific activity, which was only slightly lower than that of cubic Pt nanoparticles. The Koutecky-Levich analysis revealed that the reduction of oxygen proceeded via 4-electron pathway on all the electrocatalysts studied.

show abstract

Pt-coated Pd nanocubes as catalysts for alkaline oxygen reduction activity

Cited by 25 publications

References 23 publications

Electroreduction of Oxygen on PdPt Alloy Nanocubes in Alkaline and Acidic Media

Electroreduction of Oxygen on PdPt Alloy Nanocubes in Alkaline and Acidic Media

Nanoporous PdZr surface alloy as highly active non–platinum electrocatalyst toward oxygen reduction reaction with unique structure stability and methanol–tolerance

PdPt alloy nanocubes as electrocatalysts for oxygen reduction reaction in acid media

Contact Info

Product

Resources

About