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Publications

Prof. Zonghoon Lee’s Atomic-Scale Electron Microscopy Lab

Publications

Link to Google Scholar


Publications in Nature | Science | their sister journals


Nature, 2021 Nature, 582, 511-514, 2020 / Nature Nanotechnology, 15, 289-295, 2020 / Nature Nanotechnology, 15, 59-66, 2020 / Science Advances, 6 (10), eaay4958, 2020 / Nature Electronics, 3, 207-215, 2020 / Nature Communications, 11 (1437), 2020 / Nature Energy, 3, 773-782, 2018 / Nature Communications, 8:1549, 2017 / Nature Communications, 6:8294, 2015 / Nature Communications, 6:7817, 2015 / Nature Communications, 5:3383, 2014




- Selected as Journal Cover of July 2019

- Featured on Hot Topic: Water Splitting 


Abstract


 The most efficient electrocatalyst for the hydrogen evolution reaction (HER) is a Pt‐based catalyst, but its high cost and nonperfect efficiency hinder wide‐ranging industrial/technological applications. Here, an electrocatalyst of both ruthenium (Ru) single atoms (SAs) and N‐doped‐graphitic(G​N)‐shell‐covered nitrided‐Ru nanoparticles (NPs) (having a Ru‐N​x shell) embedded on melamine‐derived GN matrix {1: [Ru(SA)+Ru(NP)@RuN​x@G​N]/G​N}, which exhibits superior HER activity in both acidic and basic media, is presented. In 0.5 m H2SO4/1 m KOH solutions, 1 shows diminutive “negative overpotentials” (−η = |η| = 10/7 mV at 10 mA cm​-2, lowest ever) and high exchange current densities (4.70/1.96 mA cm​-2). The remarkable HER performance is attributed to the near‐zero free energies for hydrogen adsorption/desorption on Ru(SAs) and the increased conductivity of melamine‐derived G​N sheets by the presence of nitrided‐Ru(NPs). The nitridation process forming nitrided‐Ru(NPs), which are imperfectly covered by a G​N shell, allows superb long‐term operation durability. The catalyst splits water into molecular oxygen and hydrogen at 1.50/1.40 V (in 0.1 m HClO​4/1 ​m KOH), demonstrating its potential as a ready‐to‐use, highly effective energy device for industrial applications.

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2011

Prior to Joining UNIST, 2011

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