Preparation, structure, and stability of Pt and Pd monolayer modified Pd and Pt electrocatalysts

Wells, Peter P.; Crabb, Eleanor M.; King, Colin R.; Wiltshire, Richard J.K.; Billsborrow, B.; Thompsett, David; Russell, Andrea E.

doi:10.1039/b823504j

Cited by 52 publications

(44 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The significant impact of the characterization steps in 0.1 M H 2 SO 4 underlines the extreme instability of palladium nanoparticles in acidic electrolyte, in agreement with previous reports. [44][45][46][47][48] This extent of instability, which by far exceeds that of Pt-based electrocatalysts, [49][50][51][52][53] fully justifies that Pt remains the catalyst of choice in acidic PEMFC electrodes. This latter observation is confirmed by the results obtained for the AST performed in 0.1 M H 2 SO 4 , which yields a much larger ECSA loss: ca.…”

Section: Resultsmentioning

confidence: 99%

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

Zadick

Dubau

Demirci

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

Zadick

Dubau

Demirci

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

show abstract

“…The lattice strain and adsorption behaviors of the surface Pt atoms would be greatly influenced by the core constituents 24 , resulting in the emergence of synergy effect 25 . Accordingly, most of the work was devoted to the influence of Pd core on the catalytic activity of Pt shell 5, [17][18][26][27][28] . It is noteworthy that the catalysis of Pd towards ORR has been recognized and the activity has been greatly improved by alloying with transitional metals or tailoring the exposed facets [29][30][31][32][33][34] .…”

Section: Introductionmentioning

confidence: 99%

Surface-Limited Synthesis of Pt Nanocluster Decorated Pd Hierarchical Structures with Enhanced Electrocatalytic Activity toward Oxygen Reduction Reaction

Yang

Cao

Huang

et al. 2015

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Exploring superior catalysts with high catalytic activity and durability is of significant for the development of an electrochemical device involving the oxygen reduction reaction. This work describes the synthesis of Pt-on-Pd bimetallic heterogeneous nanostructures, and their high electrocatalytic activity toward the oxygen reduction reaction (ORR). Pt nanoclusters with a size of 1-2 nm were generated on Pd nanorods (NRs) through a modified Cu underpotential deposition (UPD) process free of potential control and a subsequent surface-limited redox reaction. The Pt nanocluster decorated Pd nanostructure with a ultralow Pt content of 1.5 wt % exhibited a mass activity of 105.3 mA mg(-1) (Pt-Pd) toward ORR, comparable to that of the commercial Pt/C catalyst but 4 times higher than that of carbon supported Pd NRs. More importantly, the carbon supported Pt-on-Pd catalyst displays relatively small losses of 16% in electrochemical surface area (ECSA) and 32% in mass activity after 10 000 potential sweeps, in contrast to respective losses of 46 and 64% for the commercial Pt/C catalyst counterpart. The results demonstrated that Pt decoration might be an efficient way to improve the electrocatalytic activity of Pd and in turn allow Pd to be a promising substitution for commercial Pt catalyst.

show abstract

“…Other pre-synthesized materials, such as Te wires and TiO 2 , have also been used as hard templates to synthesize core-shell-structured electrocatalysts, such as Au@Pt, Pd@ Pt and Ru@Pt [174][175][176]. Compared with the two-step seedmediated growth method and the one-step method; however, there has been little research into other methods of core-shell-structured electrocatalyst synthesis as a result of their complex processes [177,178].…”

Section: Principles and Development Of Wet Chemical Depositionmentioning

confidence: 99%

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Wang

Luo

et al. 2018

Electrochem. Energ. Rev.

View full text Add to dashboard Cite

Pt-based catalysts are the most efficient catalysts for low-temperature fuel cells. However, commercialization is impeded by prohibitively high costs and scarcity. One of the most effective strategies to reduce Pt loading is to deposit a monolayer or a few layers of Pt over other metal cores to form core-shell-structured electrocatalysts. In core-shell-structured electrocatalysts, the compositions of the core can be divided into five classes: single-precious metallic cores represented by Pd, Ru, and Au; singlenon-precious metallic cores represented by Cu, Ni, Co, and Fe; alloy cores containing 3d, 4d or 5d metals; and carbide and nitride cores. Of these, researchers have found that carbide and nitride cores can yield tremendous advantages over alloy cores in terms of cost and promotional activities of Pt shells. In addition, desirable shells with reasonable thicknesses and compositions have been recognized to play a dominant role in electrocatalytic performances. And recently, researchers have also found that the catalytic activity of core-shell-structured catalysts is dependent on the binding energy of the adsorbents, which is determined by the d-band center of Pt. The shifting of this d-band center in turn is mainly affected by strain and electronic effects, which can be adjusted by adjusting core compositions and shell thicknesses of catalysts. In the development of these core-shell structures, optimal synthesis methods are of primary concern because they directly determine the practical application potential of the resulting electrocatalysts. And in this article, the principles behind core-shell-structured low-Pt electrocatalysts and the developmental progresses of various synthesis methods along with the traits of each type of core and its effects on Pt shell catalytic activities are discussed. In addition, perspectives on this type of catalyst are discussed and future research directions are proposed.

show abstract

Preparation, structure, and stability of Pt and Pd monolayer modified Pd and Pt electrocatalysts

Cited by 52 publications

References 21 publications

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

Effects of Pd Nanoparticle Size and Solution Reducer Strength on Pd/C Electrocatalyst Stability in Alkaline Electrolyte

Surface-Limited Synthesis of Pt Nanocluster Decorated Pd Hierarchical Structures with Enhanced Electrocatalytic Activity toward Oxygen Reduction Reaction

Core–Shell-Structured Low-Platinum Electrocatalysts for Fuel Cell Applications

Contact Info

Product

Resources

About