Abstract:

We present a synthesis of highly durable and active fuel cell electrocatalysts based on ordered fct-PtFe nanoparticles for oxygen reduction reaction.¹ We report on the design and synthesis of highly active and stable Co-N₄(O) moiety incorporated in nitrogen-doped graphene (Co₁-NG(O)) that exhibits a record-high kinetic current density and mass activity with unprecedented stability (>110 h) for electrochemical hydrogen peroxide (H₂O₂) production.² We synthesized various multimetallic heterostructured oxide nanomaterials and investigated their structure-property relationship in energy devices and catalysis.³ We report on the design and synthesis of highly active TiO₂ photocatalysts incorporated with site-specific single copper atoms (Cu/TiO₂) that exhibit reversible and cooperative photoactivation process, and enhancement of photocatalytic hydrogen generation and CO₂ photoreduction activity.⁴ We synthesized multigrain nanocrystals consisting of Co₃O₄ nanocube cores and Mn₃O₄ shells.⁵ At the sharp edges of the Co₃O₄ nanocubes, we observed that tilt boundaries of the Mn₃O₄ grains exist in the form of disclinations, and we obtained a correlation between the defects and the resulting electrocatalytic ORR behavior.

We introduced electromechanical cardioplasty using an epicardial mesh made of electrically conductive and elastic Ag/Au nanowire-rubber composite material to resemble the innate cardiac tissue and confer cardiac conduction system function.⁶ We fabricated highly conductive and elastic nanomembrane for skin electronics.⁷ We demonstrated a wearable red-green-blue (RGB) colloidal quantum dot light-emitting diode (QD LED) array with high resolution using a novel intaglio transfer printing technique.⁸ We reported a novel device design and fabrication method using metal-based etch-stop layers and a laser-assisted patterning for 3D foldable quantum dot light-emitting diodes (QLEDs).⁹ Shape-tunable multiplexed phototransistor array was fabricated using an intrinsically stretchable and color-sensitive semiconducting nanocomposite consists of size-tuned quantum dots, blended in a semiconducting polymer within an elastomeric matrix.¹⁰