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Optimizing the hydrogen adsorption on electrodes is one of the most effective strategies to promote the hydrogen evolution reaction (HER). In recent years, cobalt phosphides (CoP) have been identified as a promising catalyst for HER in acid. However, the hydrogen adsorption on CoP is strong and a considerable overpotential has to be applied to enable HER. Here, we report a strategy to weaken the hydrogen...
This article reports a study of electrochemical cycling effects on hydrogen evolution catalytic activity of gold nanoparticles in sulfuric acid. We found that after cycling within the double layer regime, up to 0.64V vs RHE, there is a dramatic effect on the HER activity of gold nanoparticles: 128mV drop of the overpotential, a decrease of 23mV/dec for the Tafel slope as well as a nearly twenty times...
We review our recent results in the development of nanostructured photonic metamaterials which provide unprecedented levels of active (nonlinear, switchable, tunable) control over light on the sub-wavelength scale.
Reflectivity measurements on a film consisting of gold nanopillars surrounded by an anodized aluminum oxide medium suggest a refractive index much larger than that predicted by considering the dispersion curves of gold and aluminum oxide.
This paper reports a novel suspended nanoscale solenoid metal inductor with inductance of several tens-nH for analog-circuit and radio-frequency application. The nanoscale inductors consist of three-dimensional aluminum or gold nanohelices, which are transformed from nanometer thick metal cantilevers by focused-ion-beam stress-introducing technology. For the inductor with a two-turn helix conductor,...
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