期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 32, 页码 28809-28817出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b06596
关键词
photoelectrocatalysis; N-2 reduction reaction; ammonia production; faradaic efficiency; MoS2@TiO2 nanojunctions
资金
- National Natural Science Foundation of China [21771021, 21720303, 21822501]
- Beijing Nova Program [xx2018115]
- Fundamental Research Funds for the Central Universities
- Analytical and Measurements Fund of Beijing Normal University
Efficient nitrogen fixation under ambient conditions is an exigent task in both basic research and industrial applications. Recently, reduction of N-2 to NH3 based on photocatalysis and/or electrocatalysis offers a possible route to the typical Haber-Bosch process. However, achieving a high yield of N-2 reduction reaction (NRR) is still a challenging goal because of the limitations of efficient catalysts. Herein, we propose a photoelectrochemical NRR route based on the rational design of MoS2@TiO2 semiconductor nanojunction catalysts through a facile hydrothermal synthetic method. The developed MoS2@TiO2 photocathode attains a high NH3 yield rate (1.42 x 10(-6) mol h(-1) cm(-2)) and a superhigh faradaic efficiency (65.52%), which is the highest record to the best of our knowledge. Moreover, MoS2@TiO2 exhibits high stability over 10 consecutive reaction cycles. Therefore, this work demonstrates an effective NRR photoelectrocatalyst and results in a breakthrough in the low faradaic efficiency because of the interfacial electronic coupling and synergistic effects between the MoS2 and TiO2 components.
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