Premium
Nanoporous Gold Embedded ZIF Composite for Enhanced Electrochemical Nitrogen Fixation
Author(s) -
Yang Yijie,
Wang ShuQi,
Wen Haoming,
Ye Tao,
Chen Jing,
Li ChengPeng,
Du Miao
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201909770
Subject(s) - nanoporous , faraday efficiency , catalysis , zeolitic imidazolate framework , imidazolate , electrochemistry , chemical engineering , materials science , nanocomposite , ammonia , composite number , ammonia production , nanotechnology , chemistry , inorganic chemistry , electrode , metal organic framework , adsorption , organic chemistry , composite material , engineering
The electrochemical nitrogen reduction reaction (NRR) offers an energy‐saving and environmentally friendly approach to produce ammonia under ambient conditions. However, traditional catalysts have extremely poor NRR performances because of their low activity and the competitive hydrogen evolution reaction. The high catalytic activity of nanoporous gold (NPG) and the hydrophobicity and molecular concentrating effect of the zeolitic imidazolate framework‐8 (ZIF‐8) were incorporated in the NPG@ZIF‐8 nanocomposite so that the ZIF‐8 shell could weaken hydrogen evolution and retard reactant diffusion. A highest Faradaic efficiency of 44 % and an excellent rate of ammonia production of (28.7±0.9) μg h −1 cm −2 were achieved, which are superior to traditional gold nanoparticles and NPG. Moreover, the composite catalyst shows high electrochemical stability and selectivity (98 %). The superior NRR performance makes NPG@ZIF‐8 one of the most promising water‐based NRR electrocatalysts for ammonia production.