The DOI matches its Crossref record; 11 of the 11 references it cites were found in a registry or an index.
Voltammetric surface dealloying of Pt bimetallic nanoparticles: an experimental and DFT computational analysis
Abstract
Voltammetric dealloying of bimetallic platinum-copper (Pt-Cu) alloys has been shown to be an effective strategy to modify the surface electrocatalytic reactivity of Pt bimetallic nanoparticles (S. Koh and P. Strasser, J. Am. Chem. Soc., 2007, 129, 12624). Using cyclic voltammetry and structural XRD studies, we systematically characterize the Pt-Cu precursor compounds as well as the early stages of the selective Cu surface dissolution (dealloying) process for Pt(25)Cu(75), Pt(50)Cu(50), and Pt(75)Cu(25) alloy nanoparticles annealed at both low and high temperature. We also assess the impact of the synthesis conditions on the electrocatalytic reactivity for the oxygen reduction reaction (ORR). To gain atomistic insight into the observed voltammetric profiles, we compare our experimental results with periodic DFT calculations of trends in the thermodynamics of surface Cu dissolution potentials from highly stepped and kinked Pt(854) single crystal surfaces. The modeling suggests a dependence of the electrochemical Cu dissolution potentials on the detailed atomic environment (coordination number, nature of coordinating atoms) of the bimetallic Pt-Cu surfaces. The DFT-predicted shifts in electrochemical Cu dissolution potentials are shown to qualitatively account for the observed voltammetric profiles during Cu dealloying. Our study suggests that metal-specific energetics have to be taken into account to explain the detailed dealloying behavior of bimetallic surfaces.
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Cites
Origin of the Overpotential for Oxygen Reduction at a Fuel-Cell Cathode
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Characterization of High‐Surface‐Area Electrocatalysts Using a Rotating Disk Electrode Configuration
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Cited by
Recent Advances in Electrocatalysts for Oxygen Reduction Reaction
Shao, M., Chang, Q., Dodelet, J.-P., & Chenitz, R. (2016) · Chemical Reviews · doi:10.1021/acs.chemrev.5b00462 · Cited by 3,903
Lattice-strain control of the activity in dealloyed core–shell fuel cell catalysts
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Self-citationTuning the Activity of Pt(111) for Oxygen Electroreduction by Subsurface Alloying
Stephens, I. E. L., Bondarenko, A. S., Perez-Alonso, F. J., Calle-Vallejo, F., Bech, L., Johansson, T. P., Jepsen, A. K., Frydendal, R., Knudsen, B. P., Rossmeisl, J., et al. (2011) · Journal of the American Chemical Society · doi:10.1021/ja111690g · Cited by 526
Carbon as catalyst and support for electrochemical energy conversion
Trogadas, P., Fuller, T. F., & Strasser, P. (2014) · Carbon · doi:10.1016/j.carbon.2014.04.005 · Cited by 522
Self-citationSolvothermal Synthesis of Platinum Alloy Nanoparticles for Oxygen Reduction Electrocatalysis
Carpenter, M. K., Moylan, T. E., Kukreja, R. S., Atwan, M. H., & Tessema, M. M. (2012) · Journal of the American Chemical Society · doi:10.1021/ja300756y · Cited by 429
Metadata
- Authors
- Strasser, P., Koh, S., & Greeley, J.
- Venue
- Physical Chemistry Chemical Physics
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2008
- Volume
- 10
- Issue
- 25
- Pages
- 3670
- ISSN
- 1463-9076 (ISSN-L)
- 1463-9084
- OpenAlex
- W1988947156
- Cited by
- 202
- References
- 11
- FWCI
- 11.32
- Type
- journal article
- Language
- en
- Open access
- closed
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