Modulation of oxygen vacancy and zero-valent zinc in ZnCr2O4 nanofibers by enriching zinc for efficient nitrate reduction

Al‐Ce Intermetallic Phase for Ambient High‐Performance Electrocatalytic Reduction of Nitrate to Ammonia

“…In order to achieve the dual goals of harvesting electricity from NO 3 À chemical pollutants and generating NH 3 via NO 3 RR, we further assembled an aqueous ZnÀ NO 3 À battery by using np-Al 11 Ce 3 as the cathode and a polished Zn foil as the anode (more details have been described in our previous work). The Figure S8 showed that the open circuit voltage of the ZnÀ NO 3 À cell with np-Al 11 Ce 3 was able to stabilize ~1.22 V over 5000 s. As a result, the battery hits a notable high power density of 8.5 mW cm À 2 at 11.3 mA cm À 2 (Figure 4a), which is superior to the previously reported ZnÀ NO 3 À batteries based on ZnCr 2 O 4 (5.52 mW cm À 2 ) [33] and Pd/TiO 2 (0.87 mW cm À 2 ), [37] and surpassing those ZnÀ NO batteries, like MoS 2 nanosheets (1.04 mW cm À 2 ), [38] and amorphous B 2.6 C supported on TiO 2 nanoarray (1.7 mW cm À 2 ), [39] more information was shown in Table S2.…”

Investigating the role of oxygen vacancies in metal oxide for enhanced electrochemical reduction of NO3− to NH3: mechanistic insights

“…ZnCr 2 O 4 nanofiber, a zinc-rich spinel, was synthesized by Dong et al 188 and used as a high-performance NO 3 RR electrocatalyst for ambient NH 3 synthesis. The electrocatalytic performance was effectively boosted by substituting bivalent Zn ions for trivalent chromium, which modulated the OVs.…”

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

“…Ammonia (NH 3 ) is a crucial chemical and a promising hydrogen fuel carrier. − Electrochemical N 2 -to-NH 3 reduction (NRR) emerges as a sustainable NH 3 synthesis method, − but its efficiency is severely restricted by the poor NH 3 -Faradaic efficiency (FE NH 3 ) and NH 3 yield rates. − In sharp contrast, electrochemical NO-to-NH 3 reduction (NORR) is more energy-efficient than NRR for NH 3 electrosynthesis. − Besides, excessive burning of fossil fuels produces enormous NO gas, which pollutes the atmosphere to endanger human health . Hence, NORR represents a promising strategy to realize both efficient NH 3 electrosynthesis and harmful NO removal.…”