Details

Autor(en) / Beteiligte

• Chen, Haijun
• Liang, Jie
• Li, Li
• Zheng, Baozhan
• Feng, Zhesheng
• Xu, Zhaoquan
• Luo, Yonglan
• Liu, Qian
• Shi, Xifeng
• Liu, Yang
• Gao, Shuyan
• Asiri, Abdullah M
• Wang, Yan
• Kong, Qingquan
• Sun, Xuping

Titel

Ti2O3 Nanoparticles with Ti3+ Sites toward Efficient NH3 Electrosynthesis under Ambient Conditions

Ist Teil von

• ACS applied materials & interfaces, 2021-09, Vol.13 (35), p.41715-41722

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Electrocatalytic nitrogen reduction reaction (NRR) enabled by introducing Ti3+ defect sites into TiO2 through a doping strategy has recently attracted widespread attention. However, the amount of Ti3+ ions is limited due to the low concentration of dopants. Herein, we propose Ti2O3 nanoparticles as a pure Ti3+ system that performs efficiently toward NH3 electrosynthesis under ambient conditions. This work has suggested that Ti3+ ions, as the main catalytically active sites, significantly increase the NRR activity. In an acidic electrolyte, Ti2O3 achieves extraordinary performance with a high NH3 yield and a Faradaic efficiency of 26.01 μg h–1 mg–1 cat. and 9.16%, respectively, which are superior to most titanium-based NRR catalysts recently reported. Significantly, it also demonstrates a stable NH3 yield in five consecutive cycles. Theoretical calculations uncovered that the enhanced electrocatalytic activity of Ti2O3 originated from Ti3+ active sites and significantly lowered the overpotential of the potential-determining step.