Scalable One‐Step Assembly of an Inexpensive Photoelectrode for Water Oxidation by Deposition of a Ti‐ and Ni‐Containing Molecular Precursor on Nanostructured WO₃

Abstract

Pure is uncharged: Uncontaminated hydrophobic interfaces, such as PMMA‐H/water interfaces, are uncharged. If the macromolecules have instead ionizable carboxylic acid endgroups, such as PMMA‐COOH, a surface charge similar to the contaminated oil/water interface is obtained.

Water Oxidation at Electrodes Modified with Earth‐Abundant Transition‐Metal Catalysts

“…[132] A combined TiO 2 /NiO x photocatalyst has been processed on a WO 3 photoelectrode from a single Ti/Ni precursor. [133]…”

Cobalt Oxide Materials for Oxygen Evolution Catalysis via Single‐Source Precursor Chemistry

“…Similarly high stability was also observed when Co cat was tested in 1 m alkalinee lectrolytes, yielding a1 0mAcm geo À2 OER current at 1.58 Vv ersus RHE under the optimized conditions, which places this material among the most activeand stable OER catalysts, clearly outperforming other reported molecular-precursor-derived catalysts. [21,22,[65][66][67] High catalytic activitya nd stability makes Co cat an attractive option for practical utilization in electrocatalytic devices, as solution-processed single-source precursor chemistry is an appealing approachf or the preparation of multifunctional coatings [17] for conducting/semiconducting materials on ac ommercial scale, due to the simplicity of the deposition procedure, its scalability,a nd the versatility of the potentialp recursors. In this respect,h igh OER activity maintained even at nearly neutral pH is hugely beneficial as it provides an opportunity to use Co cat as the coating in photoelectrochemical cells utilizing natural water resources.…”

“…[12,13] Heterometallic alkoxides seem to be an excellent optiont oa ccomplish this goal, as they readily decompose upon hydrolytic or thermalt reatment to produce homogeneous heterometallic oxidefilms with elementratios precise-ly defined by the precursor stoichiometry.M oreover,t he potential for tuning the metal combinationsi sr estricted only by the inherentt hermodynamic instability of particular metalÀ oxygen bonds, which makes the approachb ased on alkoxide precursors au niversal means for the productiono fo xide coatings, [14][15][16] particularly for energy applications. [13,[17][18][19][20][21][22] Another factor contributing to the efficiency of the electrolysis cell is the electrolyte species, which, apart from having a bufferingr ole, can affect the catalystp erformance throught he structural tuning of the latter by the inclusion of cations or anions into the catalyst structure or by ac ation/anion effect on the interfacial water structure. [23,24] The dependence of OER activity on the natureo ft he electrolyte, particularly on the cation type, [25][26][27][28] is frequently observed.…”

In Situ Self‐Assembled Polyoxotitanate Cages on Flexible Cellulosic Substrates: Multifunctional Coating for Hydrophobic, Antibacterial, and UV‐Blocking Applications

“…Similar to TiO 2 nanoparticles, metal‐doping and surface ligand functionalization can be used to tune the properties and functionality of these POT cages . However, unlike TiO 2 nanoparticles, the local environment of the guest metal dopant(s) and surface ligand(s) can be precisely determined by X‐ray crystallography, offering a unique opportunity to explore structure–property relations . The POT cages are also soluble in organic solvents, or even in water, giving them excellent processability.…”