期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 284, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2020.119746
关键词
Nitrogen reduction reaction; Electrocatalyst; Defect-rich ZnS-rGO; Vacancy engineering; Density functional theory
资金
- Young Taishan Scholars Program of Shandong Province [tsqn201909124]
- National Natural Science Foundation of China [21775054]
- Project of 20 items of University of Jinan [2019GXRC018]
- National Key Scientific Instrument and Equipment Development Project of China [21627809]
- China Postdoctoral Science Foundation [2019M652297]
The study found that defective-rich ZnS nanoparticles supported on reduced graphene oxide can serve as a high-efficiency electrocatalyst for converting N-2 to NH3, showing high yield and excellent selectivity. Through experiments and calculations, it was revealed that this catalyst activates N-2 molecules and synthesizes NH3 directly from N-2.
Electrochemical N-2 reduction is developing as an appealing carbon-neutral strategy for NH3 artificial synthesis but seriously influenced by requiring high-efficiency electmcatalysts for the N-2 activation at ambient conditions. Here, we reported that defective-rich ZnS nanoparticles supported on reduced graphene oxide (DR ZnS-rGO) acts as a high-efficiency electmcatalyst for ambient N-2-to-NH3 conversion with excellent selectivity. In 0.1 M HCl, such DR ZnS-rGO presents a large NH3 yield of 51.2 mu g h(-1) mg(cat)(-1). (-0.15 V vs. reversible hydrogen electrode, RHE) and a high faradic efficiency of 28.2 % (-0.10 V vs. RHE), as well as high electrochemical and structure stability. Isotopic labelling samples experiments reveal that the synthetic NH3 directly arise from the supplied N-2. Density functional theory calculations demonstrated that the engineering S vacancies in DR ZnS-rGO not only provide reaction sites for N-2-to-NH3 conversion but activate of N-2 molecules.
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