E-resources
-
Wang, Dabin; Azofra, Luis Miguel; Harb, Moussab; Cavallo, Luigi; Zhang, Xinyi; Suryanto, Bryan H. R.; MacFarlane, Douglas R.
ChemSusChem, October 11, 2018, Volume: 11, Issue: 19Journal Article
The electrochemical nitrogen reduction reaction (NRR) under ambient conditions is a promising alternative to the traditional energy‐intensive Haber–Bosch process to produce NH3. The challenge is to achieve a sufficient energy efficiency, yield rate, and selectivity to make the process practical. Here, we demonstrate that Ru nanoparticles (NPs) enable NRR in 0.01 m HCl aqueous solution at very high energy efficiency, that is, very low overpotentials. Remarkably, the NRR occurs at a potential close to or even above the H+/H2 reversible potential, significantly enhancing the NRR selectivity versus the production of H2. NH3 yield rates as high as ≈5.5 mg h−1 m−2 at 20 °C and 21.4 mg h−1 m−2 at 60 °C were achieved at a redox potential (E) of −100 mV versus the reversible hydrogen electrode (RHE), whereas a highest Faradaic efficiency (FE) of ≈5.4 % is achievable at E=+10 mV vs. RHE. This work demonstrates the potential use of Ru NPs as an efficient catalyst for NRR at ambient conditions. This ability to catalyze NRR at potentials near or above RHE is imperative in improving the NRR selectivity towards a practical process as well as rendering the H2 viable as byproduct. Density functional theory calculations of the mechanism suggest that the efficient NRR process occurring on these predominantly Ru (0 0 1) surfaces is catalyzed by a dissociative mechanism. Ru is not under pressure: Electrochemical nitrogen reduction reaction on Ru nanoparticles was studied experimentally, together with theoretical density functional theory calculations, demonstrating the possibility of using Ru as catalyst for ammonia synthesis under ambient conditions.
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Shelf entry
Permalink
- URL:
Impact factor
Access to the JCR database is permitted only to users from Slovenia. Your current IP address is not on the list of IP addresses with access permission, and authentication with the relevant AAI accout is required.
Year | Impact factor | Edition | Category | Classification | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Select the library membership card:
If the library membership card is not in the list,
add a new one.
DRS, in which the journal is indexed
Database name | Field | Year |
---|
Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
---|
Source: Personal bibliographies
and: SICRIS
The material is available in full text. If you wish to order the material anyway, click the Continue button.