A simple approach to synthesize NiFe-LDH–Nb₂C MXene for enhanced electrochemical nitrogen reduction reactions by a synergistic effect

Abstract

The main process for industrial ammonia synthesis is the Haber-Bosch process, which is highly energy intensive with large amounts of CO2. The electrochemical ammonia synthesis is a potential alternative to...

A two-dimensional MXene-supported CuRu catalyst for efficient electrochemical nitrate reduction to ammonia

“…20 Due to the high solubility of the nitrate in the electrolyte, the nitrate reduction reaction (NO 3 RR) offers a new method for producing ammonia. 21,22…”

Nitrate Reduction by NiFe-LDH/CeO2: Understanding the Synergistic Effect between Dual-Metal Sites and Dual Adsorption

“…Compared with CeO 2 , the H 2 and N 2 yields of NiFe-LDH/CeO 2 were significantly decreased, which may be due to the fact that coverage of NO 3 – on the NiFe-LDH/CeO 2 surface hindered the adsorption of hydrogen radicals, thereby inhibiting HER. Fe 3+ and Ni 2+ also played a crucial role in improving the selectivity of target products and reducing byproducts such as N 2 ,, (Figure S16). Finally, in order to verify that all nitrogen sources in NH 3 come from NO 3 – , the isotope labeling experiment was investigated by 1 H nuclear magnetic resonance ( 1 H NMR).…”

“…Ni 2+ further induces an upshift of the d-band center and effectively adsorbs nitrogen oxide intermediates. The hydrogen radicals could contact with Ni 2+ and Fe 3+ to form Ni 2+ -H and Fe 3+ -H bonds and then hydrogenate NO 3 – through a hydrogen overflow mechanism. − Therefore, NiFe-LDH has great potential in improving NH 3 yield and selectivity but the poor electron mobility limits its practical performance . Cerium dioxide (CeO 2 ) has been confirmed as a sufficient support for the nitrate reduction process due to its stable structure and strong reversible redox ability.…”

ZnFe2O4 nanosheet array: a highly efficient electrocatalyst for ambient ammonia production via nitrite reduction

“…Electrochemical reduction of nitrogen (eNRR) has garnered substantial research interest as a sustainable pathway for the electro-synthesis of NH 3 . 7–11 Nonetheless, the challenging dissociation enthalpy of the NN bond (941 kJ mol −1 ) and the extremely low solubility of N 2 , in conjunction with the competition from the hydrogen evolution reaction (HER), pose significant hurdles, leading to less-than-desirable NH 3 yield and faradaic efficiency (FE).…”