The fixation of nitrogen (N 2) to ammonia (NH 3) at room temperature and atmospheric pressure is an attractive but greatly challenging topic 1, 2, 3.
#Ag systems nh3 gopher full#
The designed non-loading electrocatalysis system takes full advantage of the AgNDs’ active sites for N 2 adsorption and activation, following an alternative hydrogenation mechanism revealed by theoretical calculations. Utilizing the aqueous AgNDs catalyst, a Ti plate based two-electrode configured flow-type electrochemical reactor was developed to achieve an NH 3 yield rate of 804.5 ± 30.6 μg h −1 mg Ag −1 with a FE of 8.2 ± 0.5% at a voltage of −1.8 V.
The FE can be further improved to be 20.1 ± 0.9% at the same potential by using Ti mesh modified with oxygen vacancy-rich TiO 2 nanosheets as the current collector. The as-synthesized AgNDs, homogeneously dispersed in 0.1 M Na 2SO 4 solution (pH = 10.5), can achieve an NH 3 yield rate of 600.4 ± 23.0 μg h −1 mg Ag −1 with a faradaic efficiency (FE) of 10.1 ± 0.7% at −0.25 V (vs. The system consists of aqueous Ag nanodots (AgNDs) as the catalyst and metallic titanium (Ti) mesh as the current collector for electrocatalytic NRR. Herein, we report a non-loading electrocatalysis system, where the electrocatalysts are dispersed in aqueous solution rather than loading them on electrode substrates. The electrocatalytic nitrogen (N 2) reduction reaction (NRR) relies on the development of highly efficient electrocatalysts and electrocatalysis systems.
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