The electrocatalytic properties of doped TiO2

Systematic Investigation of Iridium-Based Bimetallic Thin Film Catalysts for the Oxygen Evolution Reaction in Acidic Media

“…These results suggest that surface Cr atoms are predominately responsible for the experimentally observed enhanced specific activity of IrCrox compared to Irox. The identification of highly active Cr sites is consistent with the enhanced OER activity observed for other Cr-based systems48,50,51,61,62 and motivates optimization and nanostructuring of the IrCrox system. Ir alloys of IrSn2, IrCr, IrTi, and IrNi were synthesized via dual electron beam evaporation and evaluated for OER catalysis in acid.…”

“…The Cr-doped IrO2 structure studied herein is similar to surfacedoped structures employed to model other rutile systems. [48][49][50][51] Both the (110) and (100) surfaces of these materials were modeled due to their high activity and stability for the OER. 31,52,53 Catalyst activity was assessed by computing the thermodynamic overpotential, ℎ , the overpotential beyond which all reaction steps are thermodynamically favorable.…”

Overpotential‐Dependent Volcano Plots to Assess Activity Trends in the Competing Chlorine and Oxygen Evolution Reactions

“…Hitherto, this selectivity problem was studied by ΔE O as descriptor in junction with conventional volcano analyses. [28][29][30][31] This finding motivates to re-investigate the CER vs. OER selectivity, applying ΔG OÀ OH as descriptor, with advanced material-screening frameworks, such as overpotential-dependent volcano plots, kinetic scaling relations, or activity maps based on the electrochemical-step symmetry index; [45][46][47]70,71,80] these concepts have been recently introduced by the author and have shown to provide better results in thorough sorting of electrode materials compared to the conventionally applied volcano scheme. [48,74] Table 3.…”

“…[29] The binding energy of oxygen was also applied as descriptor in the articles of Karlsson et al, in which the authors identified optimum dopant sites for DSA-based Ti 0.7 Ru 0.3 O 2 (110) electrodes. [30,31] Based on the assessment of linear scaling relationships in junction with ΔG O , [32,33] the author introduced a model to predict CER selectivity recently. [34] The literature survey indicates that the (free-) binding energy of oxygen has been established as descriptor for trend studies of transition-metal oxide-based electrode configurations.…”

Impact of TiO2-II phase stabilized in anatase matrix by high-pressure torsion on electrocatalytic hydrogen production

“…CONTACT Kaveh TiO 2 is one of the most investigated electrocatalysts due to its environmental-friendly features, stability and low cost, but its electrocatalytic activity needs to be improved [6]. So far, different techniques such as doping [7], addition of metallic particles [8], formation of hybrid structures containing organic or carbon-based materials [9] and fabrication of hetrostructures containing two polymorphs [10,11] have been employed to enhance the electrocatalytic activity of TiO 2 . Among these techniques, the formation of structures with different phases is the only strategy that is applicable to TiO 2 in the pure form and thus it is the most environmental-friendly technique.…”