Iron‐Based Nanocatalysts for Electrochemical Nitrate Reduction

Abstract

Figure 2. The schematic illustration of the general aspects over iron-based nanocatalysts for electrochemical NO 3 RR.

FeS2@TiO2 nanobelt array enabled high-efficiency electrocatalytic nitrate reduction to ammonia

“…), as an alternative nitrogen source, is one of the main nitrogen pollutants and widely exists in industrial and domestic wastewater, which not only causes harmful threats to human health but also breaks the nitrogen balance in nature. [24][25][26][27][28] It has been reported that electrochemical nitrate reduction reaction (NO 3 RR) is enabled by the integration with nitrogen oxidation. 29,30 Given the lower dissociation bond energy of N]O (204 kJ mol −1 ) and higher water solubility of NO 3 − , NO 3 RR shows better reaction kinetics compared with NRR.…”

Recent Advances in Electrocatalytic Nitrate Reduction to Ammonia: Mechanism Insight and Catalyst Design

“…The reasonable design of electrocatalysts as the key to selectively converting nitrate to ammonia has a great influence on the formation of ammonia. In recent decades, the metal elements that can be used for electrocatalytic NRA have been widely studied, as shown in Figure a . Notably, except for noble metals, the transition metals (Fe, Cu, Ni, Co, and Ti) were extremely active in the nitrate conversion reaction. − The iron-based, Cu-based, and nonmetallic electrocatalysts have been systematically summarized in the literature. ,, In addition to the elements listed in Figure a, the recently reported nonmetallic boron and main-group p-block metals (Sb, Bi, In, etc.)…”

“…Conventional nitrate removal methods include biological denitrification and physical removal (electrodialysis, reverse osmosis, and ion exchange). , The disadvantages of high cost and low efficiency limit the further development of these technologies. For example, the biological denitrification produces a lot of biological sludge, and the physical method generates the highly concentrated nitrate brine.…”

Self‐Adaptive Electronic Structure of Amphoteric Conjugated Ligand‐Modified 3 d Metal−C3N4 Smart Electrocatalyst by pH Self‐Response Realizing Electrocatalytic Self‐Adjustment

“…Moreover, the assembly strategy has been proved in the application of electrocatalytic materials. [35] So, can amphoteric conjugated ligands be used as pH-sensing "antennas" in smart electrocatalytic materials by virtue of their pH responsive properties?…”

“…Broadly speaking, BDC‐NH 2 can self‐regulate electron distribution through adaptive structural changes under external pH stimulation, thus realizing the change of electronic structure with pH value. Moreover, the assembly strategy has been proved in the application of electrocatalytic materials [35] . So, can amphoteric conjugated ligands be used as pH‐sensing “antennas” in smart electrocatalytic materials by virtue of their pH responsive properties?…”