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Selective activation of MoS grain boundaries for enhanced electrochemical activity.
Nanoscale Horiz
May 2024
Institute of Atomic and Molecular Sciences, Academia Sinica, Taipei 10617, Taiwan.
Molybdenum disulfide (MoS) has emerged as a promising material for catalysis and sustainable energy conversion. However, the inertness of its basal plane to electrochemical reactions poses challenges to the utilization of wafer-scale MoS in electrocatalysis. To overcome this limitation, we present a technique that enhances the catalytic activity of continuous MoS by preferentially activating its buried grain boundaries (GBs).
View Article and Find Full Text PDFPerspectives on Corrosion Studies Using Scanning Electrochemical Cell Microscopy: Challenges and Opportunities.
Anal Chem
October 2023
National Center for Materials Service Safety, University of Science and Technology Beijing, Beijing 102206, P. R. China.
Scanning electrochemical cell microscopy (SECCM) allows for electrochemical imaging at the micro- or nanoscale by confining the electrochemical reaction cell in a small meniscus formed at the end of a micro- or nanopipette. This technique has gained popularity in electrochemical imaging due to its high-throughput nature. Although it shows considerable application potential in corrosion science, there are still formidable and exciting challenges to be faced, particularly relating to the high-throughput characterization and analysis of microelectrochemical big data.
View Article and Find Full Text PDFDevelopment of a micro-electrochemical machining nanosecond pulse power supply.
Rev Sci Instrum
February 2022
School of Mechanical Engineering, Hefei University of Technology, Hefei 230009, China.
Micro-electrochemical machining (micro-ECM) has been widely used for microscale and nanoscale processing of materials. The performance of the nanosecond pulse power supply is directly related to the precision of micro-ECM, which is one of the core technologies for micro-ECM. In this work, a nanosecond pulse power supply, with adjustable pulse frequency, duty cycle, and voltage, was designed with an STM32F103VET6 single-chip microcomputer as the control core and a metal-oxide-semiconductor field-effect transistor as the chopper switch component.
View Article and Find Full Text PDFNovel electrode geometry for high performance CF/FeO based planar solid state micro-electrochemical capacitors.
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October 2020
Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, Karnataka 560012, India.
A novel geometry of sharp-edged electrodes for planar micro-electrochemical capacitors is utilized for an enhanced performance compared to the conventionally used interdigitated electrodes. The sharp-edged electrode geometry achieves a 68% enhancement in the electric field at the sharp-edge of the electrodes as compared to interdigitated electrodes. Moreover, carbon foam with high specific surface area loaded with iron oxide nanoparticles allows a large mass loading for the pseudocapacitance in addition to electric double layer capacitance (EDLC).
View Article and Find Full Text PDFEvolution of short-range order in chemically and physically grown thin film bilayer structures for electronic applications.
Nanoscale
June 2020
Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany.
Functional thin films are commonly integrated in electronic devices as part of a multi-layer architecture. Metal/oxide/metal structures e.g.
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