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@ARTICLE{Choong:638016,
      author       = {Choong, Choe Earn and Hong, YuKyung and Nandy, Subhajit and
                      Wong, Kien Tiek and Weng, Bo and Choi, Eunjin and Yoon,
                      Yeomin and Jang, Min},
      title        = {{M}icro-environment regulation for strong metal–support
                      interaction in ${R}u{O}_2$-doped barium cerate for boosting
                      photocatalytic ammonia production},
      journal      = {Applied catalysis / B},
      volume       = {382},
      issn         = {0926-3373},
      address      = {Amsterdam},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2025-03964},
      pages        = {125870 -},
      year         = {2026},
      note         = {These measurements were carried out during in house
                      research beamtime: H-20010499},
      abstract     = {Modulating the local microenvironment via strong
                      metal-support interaction (SMSI) approach in Ru-based
                      photocatalyst for improving photocatalytic ammonia
                      production is poorly understood. Herein, we investigate the
                      mechanism of the SMSI effect of RuO2 on barium cerate (BC)
                      by forming Ru-O-Ce electron transfer channel to enhance the
                      photocatalytic ammonium (NH4+) production. Among the
                      prepared photocatalysts, BC-Ru0.25 showed the highest NH4+
                      formation rate of 3.533 mmol g−1 h−1 with a
                      $5.464 \%$ apparent quantum efficiency (AQE), which was
                      5.17-fold higher than BC. In-situ X-ray photoelectron
                      spectroscopy (XPS) and X-ray absorption near edge structure
                      (XANES) analyses revealed that RuO2 doping on BC promoted
                      the formation of Ru-O-Ce bonds and degenerate barium 3d
                      orbitals, creating an asymmetric coordination environment
                      that improved N2 interaction. Additionally, the formation of
                      a Ru-O-Ce electron channel on BC prolonged the electron
                      decay time and improved spatial separation, resulting in
                      higher nitric oxide (NO) radical formation due to the
                      promotion of hydroxyl radical generation from photoexcited
                      holes. Notably, in-situ surface-enhanced Raman spectroscopy
                      (SERS) analysis revealed that RuO2 loading on BC altered the
                      electronic state of Ba owing to the SMSI effect, improved N2
                      interaction on the Ba-O bonds, and facilitated the NH4+
                      production. Density functional theory (DFT) calculations
                      showed that RuO2-doping of BC can result in Ba-N bonding and
                      promote the nitric oxide reduction reaction (NORR) by
                      reducing the energy barrier of the rate-determining step and
                      accelerating the protonation process. This study
                      demonstrates the SMSI effects via the strategy of a Ru-based
                      dopant on NH4+ photocatalytic production.},
      cin          = {FS-PETRA-S / DOOR ; HAS-User},
      ddc          = {540},
      cid          = {I:(DE-H253)FS-PETRA-S-20210408 /
                      I:(DE-H253)HAS-User-20120731},
      pnm          = {632 - Materials – Quantum, Complex and Functional
                      Materials (POF4-632) / 6G3 - PETRA III (DESY) (POF4-6G3)},
      pid          = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G3},
      experiment   = {EXP:(DE-H253)P-P64-20150101},
      typ          = {PUB:(DE-HGF)16},
      doi          = {10.1016/j.apcatb.2025.125870},
      url          = {https://bib-pubdb1.desy.de/record/638016},
}