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- Title
Sulfur-deficient Bi<sub>2</sub>S<sub>3−x</sub> synergistically coupling Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-MXene for boosting electrocatalytic N<sub>2</sub> reduction.
- Authors
Luo, Yaojing; Shen, Peng; Li, Xingchuan; Guo, Yali; Chu, Ke
- Abstract
Electrocatalytic nitrogen reduction reaction (NRR) is an appealing route for the sustainable NH3 synthesis, while developing efficient and durable NRR catalysts remains at the heart of achieving high-efficiency N2-to-NH3 electrocatalysis. Herein, we rationally combine vacancy and interface engineering to design sulfur-deficient Bi2S3 nanoparticles decorated Ti3C2Tx-MXene as an effective NRR catalyst. The developed Bi2S3 nanoparticles decorated Ti3C2Tx-MXene (Bi2S3−x/Ti3C2Tx) naturally contained abundant S-vacancies and exhibited a dramatically boosted NRR activity with an NH3 yield of 68.3 µg·h−1mg−1 (−0.6 V) and a Faradaic efficiency of 22.5% (−0.4 V), far superior to pure Bi2S3 and Ti3C2Tx, and surpassing almost all ever reported Bi- and MXene-based NRR catalysts. Theoretical investigations unveiled that the exceptional NRR activity of Bi2S3−x/Ti3C2Tx stemmed from its dual-active-center system involving both S-vacancies and interfacial-Bi sites, which could synergistically promote N2 adsorption and *N2H formation to result in an energetic-favorable NRR process.
- Publication
Nano Research, 2022, Vol 15, Issue 5, p3991
- ISSN
1998-0124
- Publication type
Article
- DOI
10.1007/s12274-022-4097-9