Skip to content
DraconiticResearch
Search Sources API
203,203 studies31 sourcesUpdated 44 min ago
Peer-reviewedCC BYJournal of the American Chemical Society

Reactivity and Selectivity of Photocatalytic Nitrate Reduction Reaction to Ammonia: Pt, Pd, Ir, and Rh Single Atoms on p-Type TiO2 Nanotubes.

  • Hayoon Jung1,2
  • Johannes Will3
  • Michal Langer4
  • Rostislav Langer4
  • Štěpán Kment2
  • Michal Otyepka2,4
  • Erdmann Spiecker3
  • Patrik Schmuki1,2
4 affiliations
  1. 1Department of Materials Science and Engineering, WW4-LKO, Friedrich-Alexander-Universität Erlangen-Nürnberg, Martensstraße 7, 91058Erlangen, Germany.
  2. 2Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute (CATRIN), Palacký University Olomouc, Šlechtitelů 27, 78371Olomouc, Czech Republic.
  3. 3Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy (CENEM), IZNF, Friedrich-Alexander-Universität Erlangen-Nürnberg, Cauerstraße 3, 91058Erlangen, Germany.
  4. 4IT4Innovations, VSB-Technical University of Ostrava, 17. listopadu 2172/15, 70800Ostrava-Poruba, Czech Republic.
Read full textPDFDOICite

Abstract

We present a systematic study of noble metal (Pt, Pd, Ir, and Rh) single-atom cocatalysts decorated on p-type and quantum-confined TiO2 nanotubes for photocatalytic nitrate reduction to ammonia. All single-atom cocatalysts were prepared through a reactive deposition using different metal precursors, resulting in a single-atom oxidation state (δ+) of δ ≈ 2. At a similar loading concentration (0.2-0.3 at%) and in the absence of any sacrificial agent, Pd single atoms exhibit the highest element-specific activity for ammonia production, while Pt single atoms display a prominent photocatalytic activity with a strong tendency of nitrite reduction toward ammonia. Rh single atoms achieve the highest ammonia selectivity, whereas Ir single atoms predominantly produce nitrite due to inhibited subsequent reduction. Comparisons with single atoms deposited on conventional TiO2 (P25) and with nanoparticles supported on the nanotubes reveal that both the semiconductor properties (quantum confinement effect and p-type conductivity) and the speciation of the cocatalyst (single atom) can significantly enhance activity and selectivity. These findings aid in establishing design principles for different single-atom catalysts toward efficient and selective photocatalytic nitrogen valorization.

Related

  1. Engineering Covalent Organic Frameworks for Photocatalytic CO2 Reduction: From Exciton Dissociation to Product Selectivity
    Dingming Xue, Bing Ma, Xiuzhen Fan +5
    CatalystsPeer-reviewedCC BY 4.0CatalysisCrossref
  2. Metal/Support Interfaces Overcome Reactivity Constraints of the Oxygen Reduction Reaction
    Asmee M. Prabhu, Arravind Subramanian, Kah-Meng Yam +5
    ChemRxivPreprintCC BYElectrochemistry & energyChemRxiv
  3. Selectivity of Nitrate Reduction and Hydrogen Evolution Reaction Modulated by Aggregation of Carbon-Supported Fe Species.
    Wun-Yan Wu, Cheng-Jhe Tsai, Chih-Ying Lin +5
    Langmuir : the ACS journal of surfaces and colloidsPeer-reviewedCC BYFull textCatalysisEurope PMC
  4. Competition-Derived Relative Reactivity and 3D Electronic-State Analysis of Site- and Facial Selectivity in NaBH4/MeOH Ketone Reductions
    Daimon Sakaguchi, Taisei Kawasaki, Mayu Itakura +2
    ChemRxivPreprintLicence not statedGeneral chemistryChemRxiv
  5. Phosphorus-Doping Engineering of One-Dimensional Porous Carbon Nitride Nanotubes for Enhanced Photocatalytic Performance
    Mengshan Hou, Rongrong Jia, Junhua He +7
    CatalystsPeer-reviewedCC BY 4.0CatalysisCrossref

Cite

BibTeXRIS
BibTeX
@article{jung2026reactivity,
  title = {{Reactivity and Selectivity of Photocatalytic Nitrate Reduction Reaction to Ammonia: Pt, Pd, Ir, and Rh Single Atoms on p-Type TiO2 Nanotubes.}},
  author = {Hayoon Jung and Johannes Will and Michal Langer and Rostislav Langer and Štěpán Kment and Michal Otyepka and Erdmann Spiecker and Patrik Schmuki},
  journal = {Journal of the American Chemical Society},
  year = {2026},
  month = oct,
  doi = {10.1021/jacs.6c16392},
  url = {https://europepmc.org/article/MED/42954534},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Reactivity and Selectivity of Photocatalytic Nitrate Reduction Reaction to Ammonia: Pt, Pd, Ir, and Rh Single Atoms on p-Type TiO2 Nanotubes.
AU  - Hayoon Jung
AU  - Johannes Will
AU  - Michal Langer
AU  - Rostislav Langer
AU  - Štěpán Kment
AU  - Michal Otyepka
AU  - Erdmann Spiecker
AU  - Patrik Schmuki
PY  - 2026
DA  - 2026/10/01
JO  - Journal of the American Chemical Society
DO  - 10.1021/jacs.6c16392
UR  - https://europepmc.org/article/MED/42954534
AB  - We present a systematic study of noble metal (Pt, Pd, Ir, and Rh) single-atom cocatalysts decorated on p-type and quantum-confined TiO2 nanotubes for photocatalytic nitrate reduction to ammonia. All single-atom cocatalysts were prepared through a reactive deposition using different metal precursors, resulting in a single-atom oxidation state (δ+) of δ ≈ 2. At a similar loading concentration (0.2-0.3 at%) and in the absence of any sacrificial agent, Pd single atoms exhibit the highest element-specific activity for ammonia production, while Pt single atoms display a prominent photocatalytic activity with a strong tendency of nitrite reduction toward ammonia. Rh single atoms achieve the highest ammonia selectivity, whereas Ir single atoms predominantly produce nitrite due to inhibited subsequent reduction. Comparisons with single atoms deposited on conventional TiO2 (P25) and with nanoparticles supported on the nanotubes reveal that both the semiconductor properties (quantum confinement effect and p-type conductivity) and the speciation of the cocatalyst (single atom) can significantly enhance activity and selectivity. These findings aid in establishing design principles for different single-atom catalysts toward efficient and selective photocatalytic nitrogen valorization.
SN  - 0002-7863
SN  - 1520-5126
ER  -