Reconstruction-induced NiCu-based catalysts towards paired electrochemical refining

Abstract

A paired electrochemical refinery toward cathodic nitrate reduction reaction (NO3RR) and anodic glycerol oxidation reaction (GOR) driven by renewable electricity could generate high value-added ammonia and formic acid, simultaneously. However,...

Hierarchical Nanospheres with Polycrystalline Ir&Cu and Amorphous Cu2O toward Energy‐Efficient Nitrate Electrolysis to Ammonia

“…Such a performance surpasses those of recently reported electrolyzers for NH 3 production. [ 52–54 ] These results suggest that the Cu 0.86 Ir 0.14 O z with excellent bifunctional electrocatalytic performance could enable a highly energy‐efficient electrolyzer toward NITRR and HzOR.…”

Coupling electrocatalytic cathodic nitrate reduction with anodic formaldehyde oxidation at ultra-low potential over Cu2O

“…A typical electrocatalytic NO 3 − reduction system includes a cathodic NO 3 − reduction reaction (NO 3 − RR) and anodic oxygen evolution reaction (OER, >1.23 V versus RHE). 21 The sluggish OER requires a high onset potential, which largely restricts the rate of electrocatalytic NO 3 − RR and causes serious energy losses. 22 Therefore, to fully utilise the electrical energy, the OER should be replaced with another kinetically favourable oxidation reaction, and value-added products is expected to generates.…”

Cu2+1O/Ag Heterostructure for Boosting the Electrocatalytic Nitrate Reduction to Ammonia Performance

“…However, the reduction from NO 3 – into NH 3 contains eight-step reactions with sluggish reaction kinetics, which involves 8 e ̅ transfer [NO 3 – + 6H 2 O + 8 e ̅ → NH 3 + 9OH ̅ (1), in an alkaline medium] and relatively more possible reaction intermediates/products (NO 2 , NO 2 – , N 2 O, NO, N 2 , NH 2 OH, NH 2 NH 2 , and NH 3 ). , Thus, the key to the efficient and high-selectivity conversion from NO 3 – to the target product NH 3 is the development of highly active and highly selective catalysts. Recently, a variety of metal and metal-based electrocatalysts have been explored, such as Fe, Mo, Ti, Pd, Ni, Ag, Cu, etc. − Among them, Cu-based electrocatalysts toward electrocatalytic nitrate reduction reaction (ENO 3 RR) stand out from the crowd owing to their excellent NO 3 RR catalytic activity and NH 3 –N selectivity. − For instance, Wang and co-workers explored a NO 3 RR electrocatalyst CuO@PANI, in which CuO nano-arrays with polyaniline (PANI) modification, exhibited a high FE of 93.88% and excellent NH 3 selectivity (91.38%) in 0.5 M K 2 SO 4 for electrochemical nitrate-to-ammonia transformation . To improve the efficiency of electrocatalysis, some strategies have been applied to increase the active sites of the catalysts by regulating the compositions, forming the specific morphologies and structures.…”