Nitrogen reduction reaction under ambient conditions by K₃Ti₈O₁₇ nanorod electrocatalyst

Abstract

The substantial enhancement of ammonia consumptions in diverse fields paved the way to established electrochemical Nitrogen Reduction Reaction (NRR) as one of the idyllic alternatives for the energy-intensive Haber process....

Nanocrystalline CeMo2O8 Catalyst for Electroreduction of N2 to NH3

“…As observed, both NH 3 yield and FE increase initially with the applied potential until it attains the maximum NH 3 yield of 55.7 μgh −1 mg −1 cat and FE of 48% at −0.50 V. Nonetheless, when the potential moves negatively toward −0.60 V, NH 3 yield and FE decline obviously due to the competing hydrogen evolution reaction (HER) where the adsorption of hydrogen species outcompeted the nitrogen on the electrode surface which can be observed from the LSV curves. 55,56 Notably, no N 2 H 4 is detected after NRR under all of the applied potentials, which implies the remarkable selectivity of CeMo 2 O 8 for NH 3 production through electrocatalytic NRR (Figure 6c). Apart from that, a comparative study of the NRR performance of the CeMo 2 O 8 catalyst calcined at different temperatures such as 700, 800, and 900 °C has been done to modulate the content of oxygen vacancy.…”

“…Moreover, the N 2 saturated electrolyte has a lower onset potential and higher current density than the Ar-saturated electrolyte, which strongly signposts the NRR activity of the catalyst. 55 Subsequently, Chronoamperometry measurements are carried out to calculate the yield and faradaic efficiency for a range of applied potentials from −0.40 to −0.60 V. (Figure 5b) The corresponding Chronoamperometry curve shows that current densities do not show significant changes within 2 h of electrolysis that pointed out the stability of the catalysts under the applied potentials. The product (NH 3 ) obtained via electrocatalytic NRR was spectrophotometrically evaluated and quantified by the indophenol blue method.…”

“…N 2 is continuously supplied into the cathode throughout the reaction in which H + is produced at the anode (eq 1) and reacted with the N 2 adsorbed on the catalyst to produce NH 3 (eq 2). 55 All of the overpotentials obtained were reported based on the RHE scale.…”

Efficient carrier transfer induced by Au nanoparticles for photoelectrochemical nitrogen reduction

“…Ammonia (NH 3 ) is a crucial chemical feedstock for modern industrial societies, and it's also an important hydrogen carrier and storage intermediate. 1–3 The traditional Haber–Bosch process produces approximately 200 million tons of ammonia per year around the world, but it also leads to significant carbon dioxide emissions and energy consumption, owing to the severe reaction conditions. 4–6 Thus, it is imperative to find a synthetic ammonia method that conserves energy and protects the environment to replace the Haber–Bosch process for the development of a clean and friendly society.…”

Synergistic Interaction of MoS2 Nanoflakes on La2Zr2O7 Nanofibers for Improving Photoelectrochemical Nitrogen Reduction

“…Thus far, various materials including noble metals (Au, Pd, Ru, etc. ), − two-dimensional (2D) MXenes, metal oxides, − metal sulfides, − and metal nitrides , have been investigated as promising catalysts for electrocatalytic and photocatalytic NRR.…”