journal article·2025-07-07

Exploring Atomic-Scale Interactions at the Interface of Reducible Oxide and Ruthenium Nanocatalyst for Ammonia Decomposition

Mansu Kim, Hyuk Choi, Jonghwan Park, Jian Liu, Sohui Kim, Kunmo Koo, Vinayak P. Dravid, Dongmok Whang, Shuzhou Li, Joseph T. Hupp

ACS Materials Letters· Volume 7· Issue 7
Publisher page

Abstract

Restructuring atomic-scale interfaces between noble metal nanoparticles and metal oxides provides a promising approach to enhancing catalytic properties. In this study, Ru nanoparticles were supported on CeO 2, ZrO 2, and HfO 2 via pyrolysis of MOFs under oxygen-suppressed high-temperature conditions. Despite its nearly ideal particle size (∼2.3 nm), the Ru–CeO 2 /C catalyst exhibited the lowest ammonia decomposition activity. X-ray absorption spectroscopy and DFT calculations revealed that electron transfer from Ru to CeO 2 formed positively charged Ru and partially reduced Ce 4+, weakening the catalytic performance. In contrast, oxygen-deficient ZrO 2 and HfO 2 support donated electrons to Ru, preserving its metallic state. These findings demonstrate that the reducibility of oxide supports governs the direction and magnitude of interfacial charge transfer, directly tuning catalytic behavior. This study provides insights into the design of oxide-supported Ru catalysts for ammonia decomposition.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ammonia Synthesis and Nitrogen Reduction · Catalytic Processes in Materials Science · Advanced Photocatalysis Techniques

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States

School of Materials Science and Engineering

Nanyang Technological University

School of Advanced Material Science and Engineering, Sungkyunkwan University, 2066 Seobu-ro, Suwon, Gyeonggi-do 16419, Republic of Korea

School of Chemistry and Materials Science, Rochester Institute of Technology, 84 Lomb Memorial Drive, Rochester, New York 14623, United States

Department of Materials Science and Engineering

Northwestern University

Funding

U.S. Department of Energy · National Research Foundation of Korea · Ministry of Knowledge Economy · State of Illinois · Materials Research Science and Engineering Center, Northwestern University · National Supercomputing Centre Singapore · Northwestern University

References (33)

Show source-provided references
1. 10.1039/C8CS00152A10.1039/C8CS00152A ↗
2. 10.1021/jp510468f10.1021/jp510468f ↗
3. 10.1038/nchem.141210.1038/nchem.1412 ↗
4. 10.1038/nature2167210.1038/nature21672 ↗
5. 10.1039/C8EE02939C10.1039/C8EE02939C ↗
6. 10.1002/adfm.20230067310.1002/adfm.202300673 ↗
7. 10.1021/acs.chemrev.9b0068510.1021/acs.chemrev.9b00685 ↗
8. 10.1016/j.chempr.2017.10.00410.1016/j.chempr.2017.10.004 ↗
9. 10.1039/C2EE02865D10.1039/C2EE02865D ↗
10. 10.1023/B:CATL.0000030108.50691.d410.1023/B:CATL.0000030108.50691.d4 ↗
11. 10.1021/ja902587k10.1021/ja902587k ↗
12. 10.1007/s10562-007-9237-z10.1007/s10562-007-9237-z ↗
13. 10.1016/j.jcat.2004.03.00810.1016/j.jcat.2004.03.008 ↗
14. 10.1016/j.apcatb.2004.05.00210.1016/j.apcatb.2004.05.002 ↗
15. 10.1021/acs.jpcc.8b0196510.1021/acs.jpcc.8b01965 ↗
16. 10.1021/ja404514r10.1021/ja404514r ↗
17. 10.1007/s10904-020-01808-y10.1007/s10904-020-01808-y ↗
18. 10.1021/acs.inorgchem.2c0078410.1021/acs.inorgchem.2c00784 ↗
19. 10.1039/c0ce00906g10.1039/c0ce00906g ↗
20. 10.1021/acsomega.3c0229010.1021/acsomega.3c02290 ↗
21. 10.1002/aenm.20190093110.1002/aenm.201900931 ↗
22. 10.1039/D2RA01573K10.1039/D2RA01573K ↗
23. 10.1002/cssc.20090021710.1002/cssc.200900217 ↗
24. 10.1557/JMR.1994.026310.1557/JMR.1994.0263 ↗
25. 10.1039/C7GC00512A10.1039/C7GC00512A ↗
26. 10.1039/c3ta01590d10.1039/c3ta01590d ↗
27. 10.1016/S0263-4368(98)00077-810.1016/S0263-4368(98)00077-8 ↗
28. 10.1039/C9CP03322J10.1039/C9CP03322J ↗
29. 10.1088/1674-1056/27/4/04810310.1088/1674-1056/27/4/048103 ↗
30. 10.1002/adfm.20210950310.1002/adfm.202109503 ↗
31. 10.1021/acs.est.9b0192910.1021/acs.est.9b01929 ↗
32. 10.1039/D0CS00920B10.1039/D0CS00920B ↗
33. 10.1021/acscatal.7b0446910.1021/acscatal.7b04469 ↗