Facile Preparation of Carbon Shells-Coated O-Doped Molybdenum Carbide Nanoparticles as High Selective Electrocatalysts for Nitrogen Reduction Reaction under Ambient Conditions

ACS Applied Materials & Interfaces
Ximing QuShigang Sun

Abstract

Electrochemical nitrogen reduction reaction (NRR) has been considered as a promising alternative to the traditional Haber-Bosch process for the preparation of ammonia (NH3) under ambient conditions. The development of cost-effective electrocatalysts with suppressive activity for hydrogen evolution reaction is critical for improving the efficiency of NRR. Herein, oxygen-containing molybdenum carbides (O-MoC) embedded in nitrogen-doped carbon layers (N-doped carbon) can be easily fabricated by pyrolyzing the chelate of dopamine and molybdate. A rate of NH3 formation of 22.5 μg·h-1·mgcat-1 is obtained at -0.35 V versus reversible hydrogen electrode with a high faradaic efficiency of 25.1% in 0.1 mM HCl + 0.5 M Li2SO4. Notably, the synthesized O-MoC@NC-800 also exhibits high selectivity (no formation of hydrazine) and electrochemical stability. The moderate electron structure induced by the interaction between O-MoC and N-doped carbon shells can effectively weaken the activity of hydrogen evolution reaction and increase the faradaic efficiency of NRR. Additionally, by applying the in situ Fourier transform infrared spectroscopy, an associative reaction pathway is proposed on O-MoC@NC-800. This work provides new insights into the ra...Continue Reading

References

Apr 25, 2017·Journal of the American Chemical Society·Dong Young ChungYung-Eun Sung
Jan 11, 2018·Journal of the American Chemical Society·Yao YaoMinhua Shao
May 3, 2018·Science Advances·Yang SongAdam J Rondinone
Nov 2, 2018·Chemical Communications : Chem Comm·Ling ZhangXuping Sun
Dec 20, 2018·Advanced Materials·Feng Jiao, Bingjun Xu
Jan 30, 2019·ACS Central Science·Xiang RenXuping Sun
Mar 1, 2019·Chemical Communications : Chem Comm·Li XiaXuping Sun
Mar 19, 2019·Chemical Communications : Chem Comm·Xiaojuan ZhuXuping Sun

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Citations

Mar 24, 2020·ChemSusChem·Xian-Wei LvZhong-Yong Yuan
Jul 9, 2021·Chemical Communications : Chem Comm·Debabrata ChandaXuping Sun
Nov 25, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Xia LiWeidong Shi
Mar 21, 2020·ACS Applied Materials & Interfaces·Xian-Wei LvZhong-Yong Yuan
Nov 10, 2021·ACS Nano·Mandira MajumderKolleboyina Jayaramulu
Dec 7, 2021·Chemical Society Reviews·Qiang LiuJeroen A van Bokhoven

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