FeMo sub-nanoclusters/single atoms for neutral ammonia electrosynthesis
學年 109
學期 1
出版（發表）日期 2020-11-01
作品名稱 FeMo sub-nanoclusters/single atoms for neutral ammonia electrosynthesis
作品名稱（其他語言）
著者 Wei Liu; Lili Han; Hsiao-Tsu Wang; Xueru Zhao; J. Anibal Boscoboinik; Xijun Liu; Chih-Wen Pao; Jiaqiang Sun; Longchao Zhuo; Jun Luo; Junqiang Ren; W. F. Pong; Huolin L. Xin
單位
出版者
著錄名稱、卷期、頁數 Nano Energy 77, 105078
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.
關鍵字 Nitrogen fixation;Ammonia electrosynthesis;Neutral electrolyte;Sub-nanocluster;Single atom;FeMo electrocatalyst
語言 en_US
ISSN 2211-3282
期刊性質 國外
收錄於 SCI
產學合作
通訊作者
審稿制度 否
國別 USA
公開徵稿
出版型式 ,電子版,紙本
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