Thickness dependence of proton conductivity of anodic ZrO2–WO3–SiO2 nanofilms

High Proton Conductivity in Anodic ZrO2–WO3–SiO2 Nanofilms

“…The R ox1 and R ox2 values obtained at 50ºC are 13 and 34 Ω cm 2 , respectively. The thickness of the remained inner layer, not influenced by hydrogen, could be estimated to be 80 nm from the resistance of the inner ZrO 2 -WO 3 -SiO 2 bulk layer, which is 2.4 ×10 -7 S cm -1 , as reported previously (8). In addition, the conductivity of the outer conductivity-enhanced layer, which might be 120 nm thick, is estimated to be 9.2×10 -7 S cm -1 .…”

“…As shown above, the anodic oxide films on the Zr 37 W 47 Si 16 consist of two layers: an outer ZrO 2 layer and an inner layer containing all alloy-constituting element species. The each layer has different proton conductivity (8). To examine the contribution of each layer of anodic film on proton conductivity in the reducing atmosphere, the conductivity measurement was conducted before and after removing the outer ZrO 2 layer.…”

Formation and Dielectric Properties of Anodic Films Formed on Ta-W Alloys at Various Formation Voltages

“…The voltage-dependent hydration degree of the anodic films may be one of the reasons for the change in the formation ratio at the low formation voltage. 30 GDOES depth profiles of the anodic films formed on the Ta-W alloys (Fig. 5) disclose that the films consist of two layers; an outer thin layer is composed of tungsten-free Ta 2 O 5 and an inner layer contains both tantalum and tungsten species.…”

Platinum-modified cobalt nanosheets supported on three-dimensional carbon sponge as a high-performance catalyst for hydrogen peroxide electroreduction

“…Fuel cells (FCs) have attracted considerable attention in recent years because they can provide a promising alternative to incumbent electrical power generation technologies, for medium-scale applications such as remote or backup power, as well as small-scale applications [1][2][3][4][5]. Over the years, the investigation of liquid-based FCs employing hydrogen peroxide (H 2 O 2 ) to replace oxygen (O 2 ) as oxidant (e.g.…”