TY - JOUR
T1 - Enhanced Nitrogen Photofixation over LaFeO3 via Acid Treatment
AU - Sun, Xiang
AU - Jiang, Dong
AU - Zhang, Ling
AU - Sun, Songmei
AU - Wang, Wenzhong
N1 - Funding Information:
This work was financially supported by the National Natural Science Foundation of China (51772312, 21671197, 51472260) and the research grant (16ZR1440800) from the Shanghai Science and Technology Commission.
Publisher Copyright:
© 2017 American Chemical Society.
PY - 2017/11/6
Y1 - 2017/11/6
N2 - The N2 photofixation presents a green and eco-friendly ammonia synthesis approach. However, present strategies for light-induced N2 activation suffer from low efficiency and instability, largely hindering the development of this technology. Herein, we report the LaFeO3 co-optimization of N2 activation as well as subsequent photoinduced protonation with the further phosphate acid treatment. Efficient ammonia evolution rate reached 250 μmol g-1 h-1 over LaFeO3 under simulated sunlight with appropriate acid treatment. The enhancement of phosphate modified samples was mainly attributed to the "pull and push" effect. The hydrogen bonding centers and transition metals (Fe) served as two separation active sites, which improves the adsorption and activation of dinitrogen. In addition, the facilitation of H2O dissociation was also achieved after phosphate modification. These results suggested an alternative N2 photofixation strategy of traditional organic and precious metallic additives for efficient ammonia synthesis.
AB - The N2 photofixation presents a green and eco-friendly ammonia synthesis approach. However, present strategies for light-induced N2 activation suffer from low efficiency and instability, largely hindering the development of this technology. Herein, we report the LaFeO3 co-optimization of N2 activation as well as subsequent photoinduced protonation with the further phosphate acid treatment. Efficient ammonia evolution rate reached 250 μmol g-1 h-1 over LaFeO3 under simulated sunlight with appropriate acid treatment. The enhancement of phosphate modified samples was mainly attributed to the "pull and push" effect. The hydrogen bonding centers and transition metals (Fe) served as two separation active sites, which improves the adsorption and activation of dinitrogen. In addition, the facilitation of H2O dissociation was also achieved after phosphate modification. These results suggested an alternative N2 photofixation strategy of traditional organic and precious metallic additives for efficient ammonia synthesis.
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U2 - 10.1021/acssuschemeng.7b01912
DO - 10.1021/acssuschemeng.7b01912
M3 - Article
AN - SCOPUS:85033453520
SN - 2168-0485
VL - 5
SP - 9965
EP - 9971
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 11
ER -
