Meticulous integration of N and C active sites in Ni2P electrocatalyst for sustainable ammonia oxidation and efficient hydrogen production

Recent Advances in Hydrogen Production from Hybrid Water Electrolysis through Alternative Oxidation Reactions

“…Formate and H 2 100 % 0.30 ethanol [49] 1 M KOH Pt/C/NF j j NiOOH-CuO/ CF 1.430 V at 50 mA • cm À 2 1.591 V at 200 mA • cm À 2 1.35 V at 200 mA • cm À 2 acetic acid 79.1 % glycerol [62] 1 M KOH graphite rod j j NiVRu-LDHs NAs/NF furfural [41] 1 M KOH Pt/C j j Cu foam 0.31 V at 100 mA • cm À 2 2-furoic acid and H 2 100 % 5-hydroxymethyl furfural [41] 0.27 V at 100 mA • cm À 2 hydroxymethyl-2-furancarboxylic acid and H 2 100 % 0.35 5-hydroxymethylfurfural [120] 1 M KOH 3D N-MoO 2 /Ni 3 S 2 NF j j 3D N-MoO 2 /Ni 3 S 2 NF 2.08 V at 100 mA • cm À 2 1.70 V at 100 mA • cm À 2 1.60 V at 100 mA • cm À 2 2,5-furandicarboxylic acid urea [120] 1.94 V at 100 mA • cm À 2 1.39 V at 100 mA • cm À 2 N 2 , CO 2 glycerol [59] 3 M KOH Pt foil j j Au/Ni(OH) 2 0.95 V at 317.7 mA • cm À 2 lactic acid 47 % 3.1 ethylene glycol [59] 1.15 V at 326.2 mA • cm À 2 glycolic acid 96 % 3.1 urea [87] 1 [94] 1 M KOH Ni 2 P@NÀ C j j Ni 2 P@N-C 1.57 V at 50 mA • cm À 2 N 2 8.611 benzylamine [99] 1 M KOH Pt sheet j j Fe-Ni 3 S 2 1.36 V to reach 10 mA • cm À 2 benzonitrile 99 % product yield 3.25 ascorbic acid [104] 1 M Na 2 SO 4 Pt j j Fe @Ketjen black 0.492 V at 10 mA • cm À 2 dehydroascorbic acid 100 % 2.63 Na 2 S [118] 1 M KOH a/c S-Pd NSA/NF j j a/c S-Pd NSA/NF 0.642 V at 100 mA • cm À 2 S Na 2 S [116] 1 M NaOH (CuCoN/CC j j CuCoS/ CC 0.75 V at 100 mA • cm À 2…”

“…Jo et al [94] prepared a nitrogen doped-carbon supported nickel phosphide nitrogen doped-carbon supported nickel phosphide (Ni 2 P@N-C) catalyst for a coupled system of ammonia oxidation and hydrogen evolution, resulting in a lower energy consumption of 8.611 kWh kg H2 À 1 . Hydrazine oxidation reaction (HzOR) can also significantly reduce the voltage of the electrolysis process of water, similarly, the products in this process are only nitrogen and hydrogen.…”

“…Jo et al [94] . prepared a nitrogen doped‐carbon supported nickel phosphide nitrogen doped‐carbon supported nickel phosphide (Ni 2 P@N‐C) catalyst for a coupled system of ammonia oxidation and hydrogen evolution, resulting in a lower energy consumption of 8.611 kWh kg H2 −1 .…”

Cu intercalation and defect engineering realize an atomic-scale hydrogen spillover effect in NbS2 to boost acidic hydrogen evolution

“…26 As an important indicator to evaluate the intrinsic activity of catalysts, the turnover frequency (TOF) is also extracted. 48,49 As shown in Fig. S16, † the TOF value of Cu 0.4 NbS 2−δ is higher than those of NbS 2 and Cu 0.4 NbS 2 : at an overpotential of 300 mV, the TOF of Cu 0.4 NbS 2−δ is 0.145 H 2 per s, which is much larger than those of NbS 2 (0.001 H 2 per s) and Cu 0.4 NbS 2 (0.021 H 2 per s), indicating higher intrinsic activity.…”

In situ decorated Cu2FeSnS4 nanosheet arrays for low voltage hydrogen production through the ammonia oxidation reaction

“…8,9 Therefore, alternate oxidation reactions must replace the anodic OER of water splitting to establish a high-performing hydrogen production technique. 10 The hybrid water electrolysis (HWE) method utilizes alternative oxidation reactions, such as the ammonia oxidation reaction (AOR), 11,12 urea oxidation reaction (UOR), 13,14 hydrazine oxidation reaction (HzOR), 15,16 and alcohol oxidation reactions like methanol electro reforming (MOR) 17,18 instead of the OER to reduce the total voltage of the electrolysis cell. [19][20][21][22] Among these reactions, the MOR and AOR have relatively lesser and comparable theoretical redox potentials of 0.016 V and 0.06 V vs. RHE, respectively.…”