FeMo sub-nanoclusters/single atoms for neutral ammonia electrosynthesis | |
Liu, Wei1; Han, Lili1,2; Wang, Hsiao-Tsu3; Zhao, Xueru4; Boscoboinik, J. Anibal5; Liu, Xijun1; Pao, Chih-Wen6; Sun, Jiaqiang7; Zhuo, Longchao8; Luo, Jun1 | |
2020-11-01 | |
会议录名称 | Nano Energy |
卷号 | 77 |
出版者 | Elsevier Ltd |
摘要 | Electrochemical N2 reduction reaction (NRR) has long been regarded as a promising process to generate NH3 under ambient conditions. Therefore, developing cost-effective and high-performance non-noble-metal catalysts for NRR is highly desirable. Inspired by the biological nitrogenase structure, we here designed and synthesized a catalyst with iron-molybdenum sub-nanoclusters and single atoms on porous nitrogen-doped carbon (FeMo/NC). The catalyst features porous structure beneficial to active site exposure and accessibility to electrolyte as well as FeMo sub-nanoclusters and single atoms enabling to activate N2 molecular. In situ near-ambient pressure X-ray photoelectron spectroscopy tests reveal that during the process from vacuum to nitrogen saturation, N2 was close to, adsorbed on and interacted with Fe and Mo in FeMo/NC. The Fe and Mo through electron transfer play a key role in activating the N2 molecules. Therefore, when tested for NRR, FeMo/NC achieves the maximum Faradaic efficiency (FE) of 11.8 ± 0.8% at −0.25 V and NH3 yield rate of 26.5 ± 0.8 μg h−1 mgcat.−1 at −0.3 V in neutral electrolyte. Moreover, the catalyst exhibits ignorable variations in the FE and a slight decrease in current density for 100,000 s. This work develops a non-precious bimetallic electrocatalyst with synergetic effect capability for efficient NH3 production and provides a guideline for the design of efficient and robust catalysts with coexistence of sub-nanoclusters and single atoms. © 2020 Elsevier Ltd |
关键词 | Ammonia Atoms Binary alloys Catalyst activity Cost effectiveness Doping (additives) Electrocatalysts Electrolytes Iron Iron alloys Iron metallography Molybdenum Nanoclusters Nitrogen Precious metals X ray photoelectron spectroscopyAmbient conditions Ambient-pressure x-ray photoelectron spectroscopies Bimetallic electrocatalysts Faradaic efficiencies Neutral electrolytes Nitrogen saturation Nitrogen-doped carbons Non-noble metal catalysts |
DOI | 10.1016/j.nanoen.2020.105078 |
收录类别 | EI |
语种 | 英语 |
EI入藏号 | 20203008965751 |
EI主题词 | Molybdenum metallography |
ISSN | 22112855 |
来源库 | Compendex |
分类代码 | 543.3 Molybdenum and Alloys - 545.1 Iron - 545.2 Iron Alloys - 547.1 Precious Metals - 761 Nanotechnology - 803 Chemical Agents and Basic Industrial Chemicals - 804 Chemical Products Generally - 804.2 Inorganic Compounds - 911.2 Industrial Economics - 931.3 Atomic and Molecular Physics - 933 Solid State Physics |
引用统计 | |
文献类型 | 会议论文 |
条目标识符 | https://ir.lut.edu.cn/handle/2XXMBERH/132725 |
专题 | 继续教育学院 省部共建有色金属先进加工与再利用国家重点实验室 |
作者单位 | 1.Center for Electron Microscopy and Tianjin Key Lab of Advanced Functional Porous Materials, Institute for New Energy Materials & Low-Carbon Technologies, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin; 300384, China; 2.Department of Physics and Astronomy, University of California, Irvine; CA; 92697, United States; 3.Department of Physics, Tamkang University, New Taipei City 251, Taiwan; 4.Institute of New-Energy Materials, School of Materials Science and Engineering, Tianjin Unviersity, Tianjin; 300072, China; 5.Center for Functional Nanomaterials, Brookhaven National Laboratory, Upton; NY; 11973, United States; 6.National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan; 7.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan; Shanxi; 030001, China; 8.School of Materials Science and Engineering, Xi'an University of Technology, Xi'an; 710048, China; 9.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China |
第一作者单位 | 材料科学与工程学院 |
推荐引用方式 GB/T 7714 | Liu, Wei,Han, Lili,Wang, Hsiao-Tsu,et al. FeMo sub-nanoclusters/single atoms for neutral ammonia electrosynthesis[C]:Elsevier Ltd,2020. |
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