Iridium-incorporated Co₃O₄with lattice expansion for energy-efficient green hydrogen production coupled with glycerol valorization

Abstract

The Iridium-incorporated Co3O4 (Ir-Co3O4) catalyst is obtained from binary CoIr-based metal–organic framework precursors via controlled calcination treatment. Structural characterizations reveal that in-situ incorporation of Ir cations can cause lattice expansion...

Sulfur and phosphorus co-doping optimized electronic structure and modulated intermediate affinity on PdSP metallene for ethanol-assisted energy-saving H2production

“…In this regard, alcohol oxidation reaction shows great potential as an alternative to OER to achieve highly efficient hydrogen production. [8][9][10][11] Among various alcohol substrates, ethanol endows itself with higher energy densities and is less toxic than methanol, comes from a wide range of renewable sources (including straw, sugarcane, and corn cob), and breaks through the bottleneck of storage and transportation. [12][13][14][15] The construction of hybrid co-electrolysis systems by coupling the cathodic hydrogen evolution reaction (HER) and anodic ethanol oxidation reaction (EOR) could potentially reduce the electrolysis voltage for hydrogen production and simultaneously generate value-added chemicals at the anode; however, its realization requires high-performance electrocatalysts.…”

Bifunctional Cobalt–Nickel Sulfide Nanoflowers as Electrocatalysts for Concurrent Energy-Efficient Hydrogen Production and Sulfur Recycling

“…Water electrolysis is considered a green approach for production of high-pure hydrogen, but it still suffers from economic bottlenecks, usually requiring a high voltage of 1.8 V for hydrogen production due to the slow kinetics of the oxygen evolution reaction (OER). − Constructing a hybrid water electrolysis system with a thermodynamically favorable anode reaction instead of OER can effectively improve energy conversion efficiency. Recently, oxidation reactions of small molecule (e.g., glucose, alcohol, − urea, , hydrazine, − and 5-hydroxymethylfurfural − )-assisted water splitting has been reported for energy-efficient hydrogen production. Specifically, the sulfion oxidation reaction (SOR, S 2– → S + 2e – , E θ = −0.48 V vs SHE) with low oxidation potential and fast kinetics is an attractive alternative to OER.…”

Sustainable Ammonia Electrosynthesis from Nitrate Wastewater Coupled to Electrocatalytic Upcycling of Polyethylene Terephthalate Plastic Waste

“…Metal–organic frameworks (MOF), as a new type of porous materials composed of metal ions and organic ligands linked by coordination bonds, exhibit abundant isolated metal nodes as active sites, high porosity, tunable pore size distribution, and high specific surface area, which have been widely used in various catalytic reactions. − However, some MOF structures are easily reconstructed as new phases in electrochemical environments due to weak coordination bonds between metal nodes and organic ligands. − Meanwhile, the oxidation or reduction of metal sites leads to changes in the valence state and coordination environment of metal species at specific potentials . The phase transition and structural reconstruction of MOF materials in electrochemical environments can potentially induce the formation of abundant active phases, exposed active sites and modulated electronic structures. − Furthermore, as heteroatoms, the incorporation of low-content noble metals into the host catalyst to form hybrid materials can optimize the bonding strength between the catalyst and intermediates, accelerate electron transfer and generate additional active sites. − …”