Formic acid generating in situ H₂ and CO₂ for nitrite reduction in the aqueous phase

Abstract

The aim of this work is to explore and to understand the effect of pH, concentrations and presence of oxygen traces on reduction nitrite in drinking water with Pd/γ-Al2O3, using...

Co nanoparticle-decorated radix cynanchi daniculati-derived carbon for efficient electrocatalytic nitrite reduction to ammonia

“…6,7 In recent years, the electrocatalytic nitrogen reduction reaction (NRR) has garnered considerable attention due to its environmental cleanliness and sustainability. [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] However, due to the extremely low solubility of N 2 , the high dissociation energy of the NN bond and the unavoidable competition with the hydrogen evolution reaction (HER) greatly limited the NH 3 yield and faradaic efficiency (FE) of the NRR. In contrast, nitrite (NO 2 − ) has better water solubility and requires lower energy to break the NO bond, making it kinetically more favorable for the reduction of NO 2 − to NH 3 .…”

“…However, the NO 2 − RR to NH 3 involves complicated six-electron transfer and side-product generation, resulting in sluggish kinetics, so it is necessary to rationally design highly efficient and selective NO 2 − RR electrocatalysts. 2,[25][26][27][28] Noble metal-based catalysts possess high catalytic activity for the NO 2 − RR, but the scarcity limits large-scale industrial applications. [29][30][31] Recently, transition metal Co-based nanomaterials have emerged as promising candidates for the NO 2 − RR, owing to their low-cost and high selectivity for converting NO 2 − to NH 3 .…”

“…However, the NO 2 − RR to NH 3 involves complicated six-electron transfer and side-product generation, resulting in sluggish kinetics, so it is necessary to rationally design highly efficient and selective NO 2 − RR electrocatalysts. 2,25–28…”