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4 results on '"Ruoqi Liu"'

1. Highly Efficient Electrocatalytic N2 Reduction to Ammonia over Metallic 1T Phase of MoS2 Enabled by Active Sites Separation Mechanism

Author

Ruoqi Liu, Ting Guo, Hao Fei, Zhuangzhi Wu, Dezhi Wang, and Fangyang Liu

Subjects
electrocatalysis, metallic phase, molybdenum disulfide, nitrogen reduction reaction, Science
Abstract

Abstract The 1T phase of MoS2 has been widely reported to be highly active toward the hydrogen evolution reaction (HER), which is expected to restrict the competitive nitrogen reduction reaction (NRR). However, in this work, a prototype of active sites separation over 1T‐MoS2 is proposed by DFT calculations that the Mo‐edge and S atoms on the basal plane exhibit different catalytic NRR and HER selectivity, and a new role‐playing synergistic mechanism is also well enabled for the multistep NRR, which is further experimentally confirmed. More importantly, a self‐sacrificial strategy using g‐C3N4 as templates is proposed to synthesize 1T‐MoS2 with an ultrahigh 1T content (75.44%, named as CNMS, representing the composition elements of C, N, Mo, and S), which yields excellent NRR performances with an ammonia formation rate of 71.07 µg h–1 mg–1cat. at −0.5 V versus RHE and a Faradic efficiency of 21.01%. This work provides a promising new orientation of synchronizing the selectivity and activity for the multistep catalytic reactions.

Published
2022
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4. Highly Efficient Electrocatalytic N2 Reduction to Ammonia over Metallic 1T Phase of MoS2 Enabled by Active Sites Separation Mechanism

Author

Hao Fei, Ting Guo, Ruoqi Liu, Zhuangzhi Wu, Dezhi Wang, and Fangyang Liu

Subjects
General Chemical Engineering, Science, General Engineering, General Physics and Astronomy, Medicine (miscellaneous), nitrogen reduction reaction, Electrocatalyst, Biochemistry, Genetics and Molecular Biology (miscellaneous), Combinatorial chemistry, Redox, metallic phase, Catalysis, Metal, chemistry.chemical_compound, Ammonia, chemistry, Phase (matter), visual_art, visual_art.visual_art_medium, electrocatalysis, General Materials Science, molybdenum disulfide, Selectivity, Molybdenum disulfide
Abstract

The 1T phase of MoS2 has been widely reported to be highly active toward the hydrogen evolution reaction (HER), which is expected to restrict the competitive nitrogen reduction reaction (NRR). However, in this work, a prototype of active sites separation over 1T‐MoS2 is proposed by DFT calculations that the Mo‐edge and S atoms on the basal plane exhibit different catalytic NRR and HER selectivity, and a new role‐playing synergistic mechanism is also well enabled for the multistep NRR, which is further experimentally confirmed. More importantly, a self‐sacrificial strategy using g‐C3N4 as templates is proposed to synthesize 1T‐MoS2 with an ultrahigh 1T content (75.44%, named as CNMS, representing the composition elements of C, N, Mo, and S), which yields excellent NRR performances with an ammonia formation rate of 71.07 µg h–1 mg–1cat. at −0.5 V versus RHE and a Faradic efficiency of 21.01%. This work provides a promising new orientation of synchronizing the selectivity and activity for the multistep catalytic reactions.

Published
2022

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