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Boron Nanosheet: An Elemental Two-Dimensional (2D) Material for Ambient Electrocatalytic N2-to-NH3 Fixation in Neutral Media
Abstract
The Haber–Bosch process for industrial NH 3 production suffers from harsh reaction conditions and serious CO 2 emission. Electrochemical N 2 reduction offers a carbon-neutral alternative for more energy-saving NH 3 synthesis but requires active electrocatalysts for the N 2 reduction reaction (NRR). In this Letter, boron nanosheet (BNS) is proposed as an elemental two-dimensional (2D) material to effectively catalyze the NRR toward NH 3 synthesis with excellent selectivity. When tested in 0.1 M Na 2 SO 4, such BNS catalyst attains a high Faradaic efficiency of 4.04% and a large NH 3 yield of 13.22 μg h –1 mg cat –1 at −0.80 V vs reversible hydrogen electrode, with strong electrochemical durability. Density functional theory calculations suggest that the B atoms of both oxidized and H-deactivated BNS can catalyze the NRR more effectively than clean BNS, and the rate-determining step is the desorption process of the second NH 3 gas.
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Metadata
- Authors
- Zhang, X., Wu, T., Wang, H., Zhao, R., Chen, H., Wang, T., Wei, P., Luo, Y., Zhang, Y., & Sun, X.
- Venue
- ACS Catalysis
- Publisher
- American Chemical Society (ACS)
- Published
- 2019-04-22
- Volume
- 9
- Issue
- 5
- Pages
- 4609-4615
- ISSN
- 2155-5435 (ISSN-L)
- OpenAlex
- W2941496194
- Cited by
- 299
- References
- 51
- FWCI
- 10.48
- Type
- journal article
- Language
- en
- Open access
- closed
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