Person
Tzu-Hsien Shen
This person is no longer with EPFL
Related publications (9)
Insights into Electrocatalyst Transformations Studied in Real Time with Electrochemical Liquid-Phase Transmission Electron Microscopy
Vasiliki Tileli, Tzu-Hsien Shen, Robin Pierre Alain Girod
The value of operando and in situ characterization methodologies for understanding electrochemical systems under operation can be inferred from the upsurge of studies that have reported mechanistic insights into electrocatalytic processes based on such mea ...
Washington2023Electron probing of oxygen-evolving oxide catalysts
Water splitting is one of the cleanest ways to store energy. The production of hydrogen and oxygen gases can be utilized in fuel cells to generate electricity, power, and heat. In the water splitting process, the oxygen evolution reaction (OER), taking pla ...
EPFL2022Switchable wetting of oxygen-evolving oxide catalysts
Vasiliki Tileli, Tzu-Hsien Shen
The surface wettability of catalysts is typically controlled via surface treatments that promote catalytic performance. Here we report on potential-regulated hydrophobicity/hydrophilicity at cobalt-based oxide interfaces with an alkaline solution. The swit ...
NATURE PORTFOLIO2021Multi-channel nanowire devices for efficient power conversion
Elison de Nazareth Matioli, Vasiliki Tileli, Tzu-Hsien Shen
Nanowire-based devices can potentially be of use in a variety of electronic applications, from ultrascaled digital circuits to 5G communication networks. However, the devices are typically restricted to low-power applications due to the relatively low elec ...
NATURE RESEARCH2021Lithium-Gold Reference Electrode for Potential Stability DuringIn SituElectron Microscopy Studies of Lithium-Ion Batteries
Vasiliki Tileli, Jialiang Fan, Tzu-Hsien Shen, Robin Pierre Alain Girod, Nikolaos Nianias, Jing Hou
Electrochemical liquid-phase transmission electron microscopy (TEM) is showing excellent promise in fundamental studies of energy-related processes including lithium-ion battery (LIB) cycling. A key requirement to accurately interpret the measurements and ...
2020Oxygen Evolution Reaction in Ba0.5Sr0.5Co0.8Fe0.2O3-delta Aided by Intrinsic Co/Fe Spinel-Like Surface
Vasiliki Tileli, Thi Ha My Pham, Tzu-Hsien Shen, Jan Vávra
Among the perovskites used to catalyze the oxygen evolution reaction (OER), Ba0.5Sr0.5Co0.8Fe0.2O3-delta (BSCF) exhibits excellent activity which is thought to be related to dynamic reconstruction at the flexible perovskite surface due to accommodation of ...
AMER CHEMICAL SOC2020Real-time Monitoring Reveals Dissolution/Redeposition Mechanism in Copper Nanocatalysts during the Initial Stages of the CO2 Reduction Reaction
Raffaella Buonsanti, Vasiliki Tileli, Dragos-Constantin Stoian, Tzu-Hsien Shen, Jan Vávra
Size, morphology, and surface sites of electrocatalysts have a major impact on their performance. Understanding how, when, and why these parameters change under operating conditions is of importance for designing stable, active, and selective catalysts. He ...
WILEY-V C H VERLAG GMBH2020Charge/discharge cycling of Li1+x(Ni0.6Co0.2Mn0.2)1−xO2 primary particles performed in a liquid microcell for transmission electron microscopy studies
Vasiliki Tileli, Tzu-Hsien Shen, Robin Pierre Alain Girod, Jing Hou
Ni-rich layered oxides are promising positive electrodes for fulfillment of government and industry targets for lithium-ion-battery-operated electric mobility purposes. Apart from ongoing research focusing on their design and material production, advanced ...
2020Impact of Intermittent Operation on Lifetime and Performance of a PEM Water Electrolyzer
Vasiliki Tileli, Tzu-Hsien Shen
The aim of this study is to provide a better understanding of performance degrading mechanisms occurring when a proton exchange membrane water electrolyzer (PEM-WE) is coupled with renewable energies, where times of operation and idle periods alternate. An ...
ELECTROCHEMICAL SOC INC2019