The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.
Atomic Structure of Pt3Ni Nanoframe Electrocatalysts by in Situ X-ray Absorption Spectroscopy
Open accessAbstract
Understanding the atomic structure of a catalyst is crucial to exposing the source of its performance characteristics. It is highly unlikely that a catalyst remains the same under reaction conditions when compared to as-synthesized. Hence, the ideal experiment to study the catalyst structure should be performed in situ. Here, we use X-ray absorption spectroscopy (XAS) as an in situ technique to study Pt3Ni nanoframe particles which have been proven to be an excellent electrocatalyst for the oxygen reduction reaction (ORR). The surface characteristics of the nanoframes were probed through electrochemical hydrogen underpotential deposition and carbon monoxide electrooxidation, which showed that nanoframe surfaces with different structure exhibit varying levels of binding strength to adsorbate molecules. It is well-known that Pt-skin formation on Pt-Ni catalysts will enhance ORR activity by weakening the binding energy between the surface and adsorbates. Ex situ and in situ XAS results reveal that nanoframes which bind adsorbates more strongly have a rougher Pt surface caused by insufficient segregation of Pt to the surface and consequent Ni dissolution. In contrast, nanoframes which exhibit extremely high ORR activity simultaneously demonstrate more significant segregation of Pt over Ni-rich subsurface layers, allowing better formation of the critical Pt-skin. This work demonstrates that the high ORR activity of the Pt3Ni hollow nanoframes depends on successful formation of the Pt-skin surface structure.
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Cites
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Self-citationCharacterization of High‐Surface‐Area Electrocatalysts Using a Rotating Disk Electrode Configuration
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Cited by
Sui, S., Wang, X., Zhou, X., Su, Y., Riffat, S., & Liu, C.-J. (2017) · Journal of Materials Chemistry A · doi:10.1039/c6ta08580f · Cited by 916
Gao, L., Li, X., Yao, Z., Bai, H., Lu, Y., Ma, C., Lu, S., Peng, Z., Yang, J., Pan, A., et al. (2019) · Journal of the American Chemical Society · doi:10.1021/jacs.9b07238 · Cited by 376
Li, C., Tan, H., Lin, J., Luo, X., Wang, S., You, J., Kang, Y.-M., Bando, Y., Yamauchi, Y., & Kim, J. (2018) · Nano Today · doi:10.1016/j.nantod.2018.06.005 · Cited by 336
Self-citationPt-Ni Aerogels as Unsupported Electrocatalysts for the Oxygen Reduction Reaction
Henning, S., Kühn, L., Herranz, J., Durst, J., Binninger, T., Nachtegaal, M., Werheid, M., Liu, W., Adam, M., Kaskel, S., et al. (2016) · Journal of The Electrochemical Society · doi:10.1149/2.0251609jes · Cited by 87
Liu, M., Lu, B., Yang, G., Yuan, P., Xia, H., Wang, Y., Guo, K., Zhao, S., Liu, J., Yu, Y., et al. (2022) · Advanced Science · doi:10.1002/advs.202200147 · Cited by 65
Metadata
- Authors
- Becknell, N., Kang, Y., Chen, C., Resasco, J., Kornienko, N., Guo, J., Markovic, N. M., Somorjai, G. A., Stamenkovic, V. R., & Yang, P.
- Venue
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Published
- 2015-12-10
- Volume
- 137
- Issue
- 50
- Pages
- 15817-15824
- ISSN
- 0002-7863 (ISSN-L)
- 1520-5126
- OpenAlex
- W2403466016
- Cited by
- 220
- References
- 10
- FWCI
- 6.84
- Type
- journal article
- Language
- en
- Open access
- green
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- Becknell, N., Kang, Y., Chen, C., Resasco, J., Kornienko, N., Guo, J., Markovic, N. M., Somorjai, G. A., Stamenkovic, V. R., & Yang, P. (2015). Atomic Structure of Pt3Ni Nanoframe Electrocatalysts by in Situ X-ray Absorption Spectroscopy. Journal of the American Chemical Society. https://doi.org/10.1021/jacs.5b09639
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