Publications de Tzu-Hsien Shen

Graphene Electrode for Studying CO2 Electroreduction Nanocatalysts under Realistic Conditions in Microcells

The ability to resolve the dynamic evolution of electrocatalytically induced processes with electrochemical liquid-phase electron microscopy (EM) is limited by the microcell configuration. Herein, a free-standing tri-layer graphene is integrated as a membr ...

Wiley-V C H Verlag Gmbh2024

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 ...

Amer Chemical Soc2023

Elucidating the Mechanism of Fe Incorporation in In Situ Synthesized Co-Fe Oxygen-Evolving Nanocatalysts

Andreas Züttel, Vasiliki Tileli, Thi Ha My Pham, Tzu-Hsien Shen, Youngdon Ko, Liping Zhong

Ni- and Co-based catalysts with added Fe demonstrate promising activity in the oxygen evolution reaction (OER) during alkaline water electrolysis, with the presence of Fe in a certain quantity being crucial for their enhanced performance. The mode of incor ...

Amer Chemical Soc2023

Considerations of Liquid-Phase Transmission Electron Microscopy Applied to Heterogeneous Electrocatalysis

Vasiliki Tileli, Tzu-Hsien Shen, Robin Pierre Alain Girod, Jan Vávra

Liquid-phase transmission electron microscopy (LPTEM) is an essential tool for studying the dynamics of materials interactions at the nanoscale, in and/or with their operational environment. Microfabricated SiNx membrane cells further allow the integration ...

ELECTROCHEMICAL SOC INC2023

Switchable 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 PORTFOLIO2022

Electron probing of oxygen-evolving oxide catalysts

Tzu-Hsien Shen

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 ...

EPFL2022

Simulating Current Distribution of Oxygen Evolution Reaction in Microcells Using Finite Element Method

Vasiliki Tileli, Tzu-Hsien Shen

A three-dimensional finite element method (FEM) model simulating the electrochemical behaviour of Pt coplanar thin-film electrodes used for liquid cell transmission electron microscopy measurements was developed. The model included reaction kinetics and it ...

ELECTROCHEMICAL SOC INC2021

Multi-channel nanowire devices for efficient power conversion

Elison de Nazareth Matioli, Vasiliki Tileli, Jun Ma, Luca Nela, Catherine Erine, Tzu-Hsien Shen, Taifang Wang

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 ...

2021

Electrochemical Functionalization of Selectively Addressed MoS2 Nanoribbons for Sensor Device Fabrication

Aleksandra Radenovic, Vasiliki Tileli, Martina Lihter, Michael Graf, Michal Daniel Macha, Yanfei Zhao, Tzu-Hsien Shen, Miao Zhang

Tailoring the surface properties of 2D materials, such as transition metal dichalcogenides (TMDCs), at the nanoscale is becoming essential in the fabrication of various 2D material-based nanoelectronic devices. Due to the chemical inertness of their basal ...

AMER CHEMICAL SOC2021

Charge/discharge cycling of Li1+x(Ni0.6Co0.2Mn0.2)(1-x)O-2 primary particles performed in a liquid microcell for transmission electron microscopy studies (vol 2, 034007, 2020)

Vasiliki Tileli, Tzu-Hsien Shen, Robin Pierre Alain Girod, Jing Hou

2021