A metal-free catalyst for electrocatalytic NO reduction to NH₃

Abstract

A metal-free boron phosphide (BP) is first explored as an effective catalyst for electrocatalytic NO reduction to NH3, showing a high NH3-Faradaic efficiency of 83.3% with an NH3 yield rate...

Iron Diboride (FeB2) for the Electroreduction of NO to NH3

“…The binding free energies of *NO are −2.76 eV on the B site and −2.51 eV on the Fe site, which are far more negative than those of *H on the B (0.56 eV) and Fe (−0.17 eV) sites, respectively, suggesting that both B and Fe sites preferentially absorb NO over H to inhibit the competitive HER and facilitate the NORR selectivity. Likewise, the molecular dynamics simulations reveal the noticeable NO accumulation on FeB 2 (Figure f) along with an enhanced FeB 2 –*NO interaction over the FeB 2 –*H interaction (Figures g and S12), − implying that FeB 2 has a high selectivity for the adsorption and coverage of NO. All of these findings demonstrate that the Fe and B sites synergetically activate a NO molecule, while the protonation of NO is energetically more favorable on the B site.…”

Atomically Dispersed W1–O3 Bonded on Pd Metallene for Cascade NO Electroreduction to NH3

“…Electrochemical NO-to-NH 3 conversion (NORR) offers a prospective method to mitigate NO pollutants, which simultaneously facilitates NH 3 electrosynthesis due to the relatively high solubility and weak NO bond of NO in comparison with N 2 . − However, the NORR is a complex five-electron transfer process which involves multiple intermediates and hinders by the competing HER . Thus, it is imperative to explore powerful catalysts to catalyze the NORR with high activity and selectivity. − …”

Facile fabrication of boron-doped titanium carbide for efficient electrocatalytic nitrogen reduction

“…10 To date, numerous electrocatalysts have been reported to have the ability to reduce N 2 , NO 3 − and NO, including transition metal-based catalysts (such as Ti 2 O 3 , CeO 2 , MOF, PdP 2 , MoO 3− x /MXene, Bi 2 S 3− x /Ti 3 C 2 T x , and TiO 2 ) and nonmetallic catalysts (such as metal-free boron phosphide, BP). 11–19 However, designing electrocatalysts that are both efficient and stable remains a considerable challenge. 20 As emerging 2D materials, transition metal-based carbides/nitrides (MXenes) have been widely studied.…”