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Magazine Article
Sankar, R, Wong DP, Chi CS, Chien WL, Hwang JS, Chou FC, Chen LC, Chen KH.  2015.  Enhanced thermoelectric performance of GeTe-rich germanium antimony tellurides through the control of composition and structure. CrystEngComm, . 17:3440.
Chen, WC, Lien HT, Cheng TW, Su C, Chong CW, Ganguly A, Chen KH, Chen* LC.  2015.  Side Group of Poly(3-alkylthiophene)s Controlled Dispersion of Single-Walled Carbon Nanotubes for Transparent Conducting Film. ACS Appl. Mater. & Inter. . 7:4616.
Liu, YL, Yu CC, Lin KT, Yang TC, Wang EY, Chen HL, Chen LC, Chen KH.  2015.  Transparent, broadband, flexible, and bifacial-operable photodetectors containing a large-area graphene-gold oxide heterojunction. ACS Nano . 9:5093-5103.
Yen, HF, Horng YY, Hu MS, Yang WH, Tai Y, Chen KH, Chen LC.  2015.  Vertically aligned epitaxial graphene nanowalls with dominated nitrogen-doping for superior supercapacitors. Carbon . 82:124-134.
Krishnamoorthy, V, Bangolla HK, Chen C-Y, Huang Y-T, Cheng C-M, Ulaganathan RK, Sankar R, Lee K-Y, Du H-Y, Chen L-C, Chen K-H, Chen R-S.  2024.  Efficient Hydrogen Evolution Reaction in 2H-MoS2 Basal Planes Enhanced by Surface Electron Accumulation, 2024. Catalysts. 14(1) Abstract

An innovative strategy has been developed to activate the basal planes in molybdenum disulfide (MoS2) to improve their electrocatalytic activity by controlling surface electron accumulation (SEA) through aging, annealing, and nitrogen-plasma treatments. The optimal hydrogen evolution reaction (HER) performance was obtained on the surface treated with nitrogen-plasma for 120 s. An overpotential of 0.20 V and a Tafel slope of 120 mV dec−1 were achieved for the optimized condition. The angle-resolved photoemission spectroscopy measurement confirmed the HER efficiency enhanced by the SEA conjugated with the sulfur vacancy active sites in the MoS2 basal planes. This study provides new insight into optimizing MoS2 catalysts for energy applications.