Methanol electroreforming coupled to green hydrogen production over bifunctional NiIr-based metal-organic framework nanosheet arrays

Interface coupling induced built-in electric fields boost electrochemical nitrate reduction to ammonia over CuO@MnO2 core–shell hierarchical nanoarrays

“…In order to further explore the intrinsic activity of the catalyst, the electrochemically active surface area (ECSA) of the catalysts was determined by double layer capacitance (C dl ) measurements. 60,61 As exhibited in Fig. S13, † the C dl value of CuO@MnO 2 /CF is evaluated to be 18.61 mF cm À2 in 0.5 M K 2 SO 4 , which is larger than that of Cu(OH) 2 /CF (3.77 mF cm À2 ) and CuO/CF (6.27 mF cm À2 ).…”

A phosphorus modified mesoporous AuRh film as an efficient bifunctional electrocatalyst for urea-assisted energy-saving hydrogen production

“…1–5 Nevertheless, the main limitation in the development of water electrolysis techniques is the kinetically sluggish four-electron transfer process of the anodic oxygen evolution reaction (OER, 4OH − → O 2 + 2H 2 O + 4e − ), which causes large energy barriers and seriously slows down the electrocatalytic water-splitting kinetics. 6–8 To overcome the bottleneck, replacing the OER with thermodynamically favourable electrooxidation of small molecules (such as methanol, 9,10 urea 11 and hydrazine 12 ) offers an ingenious strategy for hydrogen production. Alternatively, the urea oxidation reaction (UOR, 0.37 V vs. RHE) as a promising substitute reaction to the OER is receiving increasing attention due to the favourable thermodynamics.…”

Ru-doping induced lattice strain in hetero-phase Ni2P–Ni12P5arrays enables simultaneous efficient energy-saving hydrogen generation and formate electrosynthesis

“…5,6 An innovative strategy to address these challenges is utilizing another thermodynamically more favorable anodic reaction than the OER to couple with the HER for reducing the energy input, and ideally, simultaneously producing hydrogen at the cathode and other high-value chemicals at the anode. [7][8][9][10][11][12] As a low-toxicity byproduct of biodiesel production and soap manufacturing, glycerol is a potential raw material for the production of various value-added chemicals by oxidation. Moreover, the glycerol oxidation reaction (GOR) is thermodynamically more favorable in comparison with the OER, making it an ideal alternative to replace the OER to assemble hybrid water electrolysis systems with low operating cell voltage.…”