Electrocatalytic arsenite oxidation using iron oxyhydroxide polymorphs (α-, β-, and γ-FeOOH) in aqueous bicarbonate solution

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

“…It is noteworthy that, FeOOH polymorphs mainly comprising the most common and stable goethite (𝛼-FeOOH), relatively stable akaganeite (𝛽-FeOOH), metastable lepidocrocite (𝛾-FeOOH), and ferromagnetic feroxyhyte (𝛿-FeOOH), the rising stars as pseudocapacitive alternatives, have been extensively investigated as electrode materials for batteries, supercapacitors, water splitting, and other applications. [25][26][27][28][29][30][31][32][33][34] However, compared to that of CoOOH and NiOOH, the wide development of Fe-based pseudocapacitive electrode materials remains a significant challenge owing to the inherently poor electrical conductivity and inevitably degrading structural stability resulting from large volume expansion during the consecutive intercalation/deintercalation process. Heteroatom doping has attracted recent attention as a means of overcoming these drawbacks, and various metals (Mn, Co, Ni, and, K, etc.)…”

An Intermetallic CaFe6Ge6 Approach to Unprecedented Ca−Fe−O Electrocatalyst for Efficient Alkaline Oxygen Evolution Reaction

“…As depicted in Figure 4c, five sub‐peaks O1, O2, O3, O4, and O5 can be well‐fitted at 530.1, 532.1, 532.5, 533.6, and 535.8 eV, respectively. Both O1 and O2 peaks correspond to the existence of lattice oxygen in α‐Fe III OOH, [37] while O3 and O4 are related to the C=O and C−O in CaCO 3 , respectively [38,39] . Moreover, the additional apparent O5 peak arises from the Nafion binder [40] .…”

Soft synthesis and characterization of goethite-based nanocomposites as promising cyclooctene oxidation catalysts

“…15 Far from these various applications, other studies use hydrated iron oxyhydroxide as a catalyst for inorganic and organic processes. Examples of such methods are arsenite oxidation, 16 arsenic removal from wastewater, 17 ammonia, 18 pyridine 19 or hydrogen sulphide 20 removal from coke oven gas, coal liquefaction for oil production, 21 organic compounds removing from wastewater [22][23][24][25] and microcystin-LR hydrolysis in cancer prevention. 26 On the other hand, iron-containing systems containing bimetallic [27][28][29][30][31][32][33] or trimetallic layered oxyhydroxides 27,[34][35][36] were developed, based on their tunable electronic structures and rich active sites, 37 as valuable nonprecious metal-based materials for oxygen evolution reaction (OER).…”

“…Far from these various applications, other studies use hydrated iron oxyhydroxide as a catalyst for inorganic and organic processes. Examples of such methods are arsenite oxidation, 16 arsenic removal from wastewater, 17 ammonia, 18 pyridine 19 or hydrogen sulphide 20 removal from coke oven gas, coal liquefaction for oil production, 21 organic compounds removing from wastewater 22–25 and microcystin-LR hydrolysis in cancer prevention. 26 …”