Electrochemical
Reduction of N2 into NH3 by Donor–Acceptor
Couples of Ni and Au Nanoparticles
with a 67.8% Faradaic Efficiency
Posted on 2019-09-17 - 13:47
The traditional NH3 production
method (Haber–Bosch
process) is currently complemented by electrochemical synthesis at
ambient conditions, but the rather low selectivity (as indicated by
the Faradaic efficiency) for the electrochemical reduction of molecular
N2 into NH3 impedes the progress. Here, we present
a powerful method to significantly boost the Faradaic efficiency of
Au electrocatalysts to 67.8% for the nitrogen reduction reaction (NRR)
by increasing their electron density through the construction of inorganic
donor–acceptor couples of Ni and Au nanoparticles. The unique
role of the electron-rich Au centers in facilitating the fixation
and activation of N2 was also investigated via theoretical
simulation methods and then confirmed by experimental results. The
highly coupled Au and Ni nanoparticles supported on nitrogen-doped
carbon are stable for reuse and long-term performance of the NRR,
making the electrochemical process more sustainable for practical
application.
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Xue, Zhong-Hua; Zhang, Shi-Nan; Lin, Yun-Xiao; Su, Hui; Zhai, Guang-Yao; Han, Jing-Tan; et al. (2019). Electrochemical
Reduction of N2 into NH3 by Donor–Acceptor
Couples of Ni and Au Nanoparticles
with a 67.8% Faradaic Efficiency. ACS Publications. Collection. https://doi.org/10.1021/jacs.9b07963