Exsolution of Ru Nanoparticles on BaCe0.9Y0.1O3-δ Modifying Geometry and Electronic Structure of Ru for Ammonia Synthesis Reaction Under Mild Conditions

Hayoung Kim, Asif Jan, Deok Hwang Kwon, Ho Il Ji, Kyung Joong Yoon, Jong Ho Lee, Yongseok Jun, Ji Won Son, Sungeun Yang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Green ammonia is an efficient, carbon-free energy carrier and storage medium. The ammonia synthesis using green hydrogen requires an active catalyst that operates under mild conditions. The catalytic activity can be promoted by controlling the geometry and electronic structure of the active species. An exsolution process is implemented to improve catalytic activity by modulating the geometry and electronic structure of Ru. Ru nanoparticles exsolved on a BaCe0.9Y0.1O3-δ support exhibit uniform size distribution, 5.03 ± 0.91 nm, and exhibited one of the highest activities, 387.31 mmolNH3 gRu−1 h−1 (0.1 MPa and 450 °C). The role of the exsolution and BaCe0.9Y0.1O3-δ support is studied by comparing the catalyst with control samples and in-depth characterizations. The optimal nanoparticle size is maintained during the reaction, as the Ru nanoparticles prepared by exsolution are well-anchored to the support with in-plane epitaxy. The electronic structure of Ru is modified by unexpected in situ Ba promoter accumulation around the base of the Ru nanoparticles.

Original languageEnglish
Article number2205424
JournalSmall
Volume19
Issue number6
DOIs
Publication statusPublished - 2023 Feb 8

Bibliographical note

Funding Information:
This research was financially supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20223030030090), National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF‐2021M3I3A1084278), Institutional Research Project (2E31852), and KU‐KIST Graduate School Project (2V09371) of KIST. Experiments using PLS‐II were supported in part by MSIT and POSTECH.

Funding Information:
This research was financially supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20223030030090), National R&D Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (NRF-2021M3I3A1084278), Institutional Research Project (2E31852), and KU-KIST Graduate School Project (2V09371) of KIST. Experiments using PLS-II were supported in part by MSIT and POSTECH.

Publisher Copyright:
© 2022 The Authors. Small published by Wiley-VCH GmbH.

Keywords

  • ammonia synthesis
  • electronic structure modification
  • exsolution
  • geometry modification
  • green ammonia
  • ruthenium

ASJC Scopus subject areas

  • Engineering (miscellaneous)
  • General Chemistry
  • General Materials Science
  • Biotechnology
  • Biomaterials

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