Low Temperature Ammonia Synthesis from Atomic N and Water on Rutile TiO<sub>2</sub>(110)<sup>†</sup>

Yuemiao Lai; Qing Guo; Xiao Chen

doi:10.1063/1674-0068/cjcp2210152

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Yuemiao Lai, Qing Guo, Xiao Chen. Low Temperature Ammonia Synthesis from Atomic N and Water on Rutile TiO2(110)†[J]. Chinese Journal of Chemical Physics . doi: 10.1063/1674-0068/cjcp2210152

Citation:

Yuemiao Lai, Qing Guo, Xiao Chen. Low Temperature Ammonia Synthesis from Atomic N and Water on Rutile TiO₂(110)^†[J]. Chinese Journal of Chemical Physics . doi: 10.1063/1674-0068/cjcp2210152

Yuemiao Lai, Qing Guo, Xiao Chen. Low Temperature Ammonia Synthesis from Atomic N and Water on Rutile TiO2(110)†[J]. Chinese Journal of Chemical Physics . doi: 10.1063/1674-0068/cjcp2210152

Citation:

Yuemiao Lai, Qing Guo, Xiao Chen. Low Temperature Ammonia Synthesis from Atomic N and Water on Rutile TiO₂(110)^†[J]. Chinese Journal of Chemical Physics . doi: 10.1063/1674-0068/cjcp2210152

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Low Temperature Ammonia Synthesis from Atomic N and Water on Rutile TiO₂(110)^†

doi: 10.1063/1674-0068/cjcp2210152

Shenzhen Key Laboratory of Energy Chemistry & Department of Chemistry, Southern University of Science and Technology, Shenzhen 518055, China

More Information

Corresponding author: E-mail: chenx37@sustech.edu.cn
Received Date: 2022-10-21
Accepted Date: 2022-12-06

Available Online: 2022-12-08

Abstract

Abstract

We have investigated the formation of ammonia (NH₃) from atomic N and water (H₂O) on a rutile(R)-TiO₂(110) surface using the temperature-programed desorption method. The formation of NH₃ can be detected after coadsorption of atomic N and H₂O on the R-TiO₂(110) surface, desorbing from the 5-fold coordinated Ti⁴⁺ (Ti_5c) sites at about 400 K, demonstrating that the NH₃ formation on R-TiO₂(110) is feasible at low surface temperature. During the process, both hydroxyl groups at the bridging oxygen rows and H₂O on the Ti_5c sites contribute to the formation of NH₃, which are affected by H₂O coverage. At low H₂O coverage, the direct hopping of hydrogen atoms may be the dominant process for hydrogen transfer; while H₂O-assisted hydrogen atoms diffusion may be preferred at high H₂O coverage. Our result will be of significant help to get a deeper insight into the fundamental understandings of hydrogenation processes during the NH₃ synthesis.
- Ammonia,
- Hydrogen transfer,
- Temperature programmed desorption,
- R-TiO₂(110)

Part of the special issue of ``the Chinese Chemical Society's 17th National Chemical Dynamics Symposium"

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References(45)

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