The DOI matches its Crossref record; 19 of the 19 references it cites were found in a registry or an index.
Stable High‐Index Faceted Pt Skin on Zigzag‐Like PtFe Nanowires Enhances Oxygen Reduction Catalysis
Abstract
Selectively exposing active surfaces and judiciously tuning the near‐surface composition of electrode materials represent two prominent means of promoting electrocatalytic performance. Here, a new class of Pt 3 Fe zigzag‐like nanowires (Pt‐skin Pt 3 Fe z‐NWs) with stable high‐index facets (HIFs) and nanosegregated Pt‐skin structure is reported, which are capable of substantially boosting electrocatalysis in fuel cells. These unique structural features endow the Pt‐skin Pt 3 Fe z‐NWs with a mass activity of 2.11 A mg−1 and a specifc activity of 4.34 mA cm−2 for the oxygen reduction reaction (ORR) at 0.9 V versus reversible hydrogen electrode, which are the highest in all reported PtFe‐based ORR catalysts. Density function theory calculations reveal a combination of exposed HIFs and formation of Pt‐skin structure, leading to an optimal oxygen adsorption energy due to the ligand and strain effects, which is responsible for the much enhanced ORR activities. In contrast to previously reported HIFs‐based catalysts, the Pt‐skin Pt 3 Fe z‐NWs maintain ultrahigh durability with little activity decay and negligible structure transformation after 50 000 potential cycles. Overcoming a key technical barrier in electrocatalysis, this work successfully extends the nanosegregated Pt‐skin structure to nanocatalysts with HIFs, heralding the exciting prospects of high‐effcient Pt‐based catalysts in fuel cells.
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Metadata
- Authors
- Luo, M., Sun, Y., Zhang, X., Qin, Y., Li, M., Li, Y., Li, C., Yang, Y., Wang, L., Gao, P., Lu, G., & Guo, S.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2018-01-15
- Volume
- 30
- Issue
- 10
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2783370387
- Cited by
- 386
- References
- 19
- FWCI
- 12.10
- Type
- journal article
- Language
- en
- Open access
- closed
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- Luo, M., Sun, Y., Zhang, X., Qin, Y., Li, M., Li, Y., Li, C., Yang, Y., Wang, L., Gao, P., Lu, G., & Guo, S. (2018). Stable High‐Index Faceted Pt Skin on Zigzag‐Like PtFe Nanowires Enhances Oxygen Reduction Catalysis. Advanced Materials. https://doi.org/10.1002/adma.201705515
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