講者：江佳穎教授
演講題目：Molybdenum Sulfide on 3D Structures for Water Splitting Reaction
演講時間：5/13（五）15:30~17:20
演講地點：博雅館 201
主持人：童國倫教授
Molybdenum Sulfide on 3D Structures for Water Splitting Reaction
Chia-Ying Chiang*, Yu-Wen Chen, Ken-Chung Lee
Department of Chemical Engineering, National Taiwan University of Science and Technology
Taipei, Taiwan (106)
* Correspondences author email: cychiang@gate.sinica.edu.tw
Tel:+886-2-27376641
Abstract
Hydrogen generation from water splitting reaction is an ideal clean energy source yet it
requires high energy input. In order to lower the water splitting energy requirement, the
development of electrocatalysts plays an important role. Among the electrocatalyst for
hydrogen generation reaction (HER), Pt is no doubt to be the best one, however, its cost
limits the possibility for widely use in the industries. As a result, the earth abundant,
cheap, and nontoxic catalyst such as molybdenum sulfide is gaining more and more
attention.
In this study, molybdenum sulfide was synthesized on various substrates, such as
carbon cloth, carbon paper and commercially available sponge. A known amount of
precursor solution was coated on the substrates and undergone thermo-decomposition.
These molybdenum sulfides show very different morphologies as well as the
electrocatalytic results. The molybdenum sulfide tends to form a sheet-like structure
with large electrochemistry surface area (ESA), i.e. ~ 8 cm2 for 1.5 cm2 geometric area
substrate, on the carbon paper but folded into a ball-like structure with lower ESA, ~2.8
cm2, on carbon cloth. Furthermore, the non-conducting sponge could also serve as a
bendable 3D scaffold and highly increase the ESA to 16 cm2 at a volume of 0.7 cm3.
Besides ESA, the electrocatalytic performance indicators, Tafel slopes and HER onset
potentials, vary as the thermolysis temperature and environment changed. More detail
result will be given in the presentation.
Keywords: molybdenum sulfide; water splitting; hydrogen evolution reaction;
electrocatalyst