Facile synthesis of IrO2 nanoparticles decorated @ WO3 as mixed oxide composite for outperformed oxygen evolution reaction

Rational Design of an Iridium–Tungsten Composite with an Iridium-Rich Surface for Acidic Water Oxidation

“…To avoid these problems, the ideal metal or A recent study 16 shows that porous iridium−tungsten alloy exhibits enhanced catalytic performance in the overall water electrolysis reaction; however, a decrease of activity has been observed after 8 h of reaction at a current density of 10 mA/ cm 2 geom . Homogenous mixed-metal oxide W 1−x Ir x O 3-σ catalysts synthesized by rapid plasma oxidation 32 and IrO 2 nanoparticles decorated on WO 3 33 were also investigated for acidic water oxidation, but the activity enhancement is limited, and longterm stability is unknown. In this work, an iridium−tungsten composite with an iridium-rich surface is rationally designed and synthesized according to the above key principles.…”

Boosting the oxygen evolution stability and activity of a heterogeneous IrRu bimetallic coating on a WO3 nano-array electrode for PEM water electrolysis

“…11,20 WO 3 is thermodynamically stable (even more stable than IrO 2 ) and can provide lattice oxygen with variable valence. [21][22][23] When it comes to the electrode, catalyst-coated membranes (CCMs) is comprehensively effected by catalyst activity, catalyst layer structure and electrolyte membrane. The use of a nanostructured electrode with ordered mass-delivery channels and a three-phase interface is an effective strategy, and it can be based on nanobers, 24 nanoarrays, 25 and so on.…”

“…29 A heterogeneous IrRu bimetallic catalyst coating on the outer layer can not only improve the electronic conductivity, but this can also elevate the dispersion of the catalyst. 22,30 Herein, we design a bimetallic IrRu coating on WO 3 nanorods to obtain a PEM water electrolysis anode. The IrRu coating features a heterogeneous structure, which is prepared via the successive electrodeposition of RuCl 3 and H 2 IrCl 6 solution.…”

OER Performances of Cationic Substituted (100)-Oriented IrO2 Thin Films: A Joint Experimental and Theoretical Study

“…For the OER, only few experimental studies have been undertaken to determine the effect of alloying on the intrinsic OER activity of the most active (100)-oriented facet of IrO 2 , and many studies have dealt with less well-defined systems. In the literature, several IrO 2 -MO x composite and/or mixed systems have been investigated, including NiO x , MnO x , , MoO 3 , SnO 2 , − and WO 3 . , Hybrid IrO x /RuO x thin films were investigated, with submonolayer amounts of IrO x deposited on top of a RuO x thin film . Studies of Ir 1– x M x O 2 solid solutions were reported as well, with M = Cr, Pt, Ru, , and Sn, , yet conclusive evidence of alloy formation through a detailed XRD analysis was not always presented.…”

“…In the literature, several IrO 2 -MO x composite and/or mixed systems have been investigated, including NiO x , 19 MnO x , 20,21 MoO 3 , 22 SnO 2 , 23−25 and WO 3 . 26,27 Hybrid IrO x /RuO x thin films were investigated, with submonolayer amounts of IrO x deposited on top of a RuO x thin film. 28 Studies of Ir 1−x M x O 2 solid solutions were reported as well, with M = Cr, 29 Pt, 30 Ru, 31,32 and Sn, 33,34 yet conclusive evidence of alloy formation through a detailed XRD analysis was not always presented.…”