Journal article
Tuning the selectivity of NH3 oxidation via cooperative electronic interactions between platinum and copper sites
- Abstract:
- Selective catalytic oxidation (SCO) of NH3 to N2 is one of the most effective methods used to eliminate NH3 emissions. However, achieving high conversion over a wide operating temperature range while avoiding over-oxidation to NOx remains a significant challenge. Here, we report a bi-metallic surficial catalyst (PtSCuO/Al2O3) with improved Pt atom efficiency that overcomes the limitations of current catalysts. It achieves full NH3 conversion at 250°C with a weight hourly space velocity of 600 ml NH3·h-1·g-1, which is 50°C lower than commercial Pt/Al2O3, and maintains high N2 selectivity through a wide temperature window. Operando XAFS studies reveal that the surface Pt atoms in PtSCuO/Al2O3 enhance the redox properties of the Cu species, thus accelerating the Cu2+ reduction rate and improving the rate of the NH3-SCO reaction. Moreover, a synergistic effect between Pt and Cu sites in PtSCuO/Al2O33 contributes to the high selectivity by facilitating internal selective catalytic reduction.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
Actions
Access Document
- Files:
-
-
(Preview, Version of record, pdf, 5.3MB, Terms of use)
-
- Publisher copy:
- 10.1038/s41467-024-54820-y
Authors
+ Engineering and Physical Sciences Research Council
More from this funder
- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/X022986/1
- Publisher:
- Springer Nature
- Journal:
- Nature Communications More from this journal
- Volume:
- 16
- Issue:
- 1
- Article number:
- 26
- Publication date:
- 2025-01-02
- Acceptance date:
- 2024-11-20
- DOI:
- EISSN:
-
2041-1723
- Language:
-
English
- Pubs id:
-
2074385
- Local pid:
-
pubs:2074385
- Deposit date:
-
2025-01-06
Terms of use
- Copyright holder:
- Chen et al
- Copyright date:
- 2025
- Rights statement:
- ©2025 The Authors. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
- Licence:
- CC Attribution (CC BY)
If you are the owner of this record, you can report an update to it here: Report update to this record