The DOI matches its Crossref record; 10 of the 10 references it cites were found in a registry or an index.
Tuning the Activity of Carbon for Electrocatalytic Hydrogen Evolution via an Iridium‐Cobalt Alloy Core Encapsulated in Nitrogen‐Doped Carbon Cages
Abstract
Graphene, a 2D material consisting of a single layer of sp 2‐hybridized carbon, exhibits inert activity as an electrocatalyst, while the incorporation of heteroatoms (such as N) into the framework can tune its electronic properties. Because of the different electronegativity between N and C atoms, electrons will transfer from C to N in N‐doped graphene nanosheets, changing inert C atoms adjacent to the N‐dopants into active sites. Notwithstanding the achieved progress, its intrinsic activity in acidic media is still far from Pt/C. Here, a facile annealing strategy is adopted for Ir‐doped metal‐organic frameworks to synthesize IrCo nanoalloys encapsulated in N‐doped graphene layers. The highly active electrocatalyst, with remarkably reduced Ir loading (1.56 wt%), achieves an ultralow Tafel slope of 23 mV dec−1 and an overpotential of only 24 mV at a current density of 10 mA cm−2 in 0.5 m sulfuric acid solution. Such superior performance is even superior to the noble‐metal catalyst Pt. Surface structural and computational studies reveal that the superior behavior originates from the decreased Δ GH* for HER induced by the electrons transferred from the alloy core to the graphene layers, which is beneficial for enhancing CH binding.
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Cites
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Cited by
Recent Advances in Electrocatalytic Hydrogen Evolution Using Nanoparticles
Zhu, J., Hu, L., Zhao, P., Lee, L. Y. S., & Wong, K.-Y. (2020) · Chemical Reviews · doi:10.1021/acs.chemrev.9b00248 · Cited by 3,133
Support and Interface Effects in Water‐Splitting Electrocatalysts
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Encapsulated Metal Nanoparticles for Catalysis
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Metadata
- Authors
- Jiang, P., Chen, J., Wang, C., Yang, K., Gong, S., Liu, S., Lin, Z., Li, M., Xia, G., Yang, Y., Su, J., & Chen, Q.
- Venue
- Advanced Materials
- Publisher
- Wiley
- Published
- 2018-01-12
- Volume
- 30
- Issue
- 9
- ISSN
- 0935-9648 (ISSN-L)
- 1521-4095
- OpenAlex
- W2784188535
- Cited by
- 285
- References
- 10
- FWCI
- 8.94
- Type
- journal article
- Language
- en
- Open access
- closed
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- Jiang, P., Chen, J., Wang, C., Yang, K., Gong, S., Liu, S., Lin, Z., Li, M., Xia, G., Yang, Y., Su, J., & Chen, Q. (2018). Tuning the Activity of Carbon for Electrocatalytic Hydrogen Evolution via an Iridium‐Cobalt Alloy Core Encapsulated in Nitrogen‐Doped Carbon Cages. Advanced Materials. https://doi.org/10.1002/adma.201705324
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