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May 13-14, 2019 | Prague, Czech Republic
Chemistry and Medicinal Chemistry
9
th
World Congress on
Page 53
Asian Journal of Biomedical and Pharmaceutical Sciences | Volume 9
ISSN: 2249-622X
Jyh-Chiang Jiang
National Taiwan University of Science and Technology, Taiwan
A first-principles study on effects of electric field on heterogeneous
catalysis
I
mproving the selectivity of chemical reactions is arguably
the primary challenge in developing an efficient catalyst
in catalysis. Electric fields can be used to adjust the
thermodynamics of chemical reactions as like temperature
and pressure, and it can control selectivity through the
field–dipole interactions. Therefore, we attempt to develop
an efficient catalyst for the selective methane conversion
process and the Iodine reduction reactions as these are
essential in solving the environmentally sustainable issues
and the energy crises. As indicated in our earlier study,
IrO
2
(110) surface can activate methane at a very low
temperature. However, due to the strong reactivity of IrO
2
,
the adsorbed methane will be completely oxidized, so it is
not advantageous to form a value-added chemical on IrO
2
.
Hence, to adjust the reactivity of IrO
2
, here we considered
the partial oxidation of methane in the presence of
external electric field. Our results demonstrated that we
could adjust the adsorption and desorption of the species
on the surface with the external electric field. The most
favorable reaction pathway is the production of surface
formaldehyde by applying a positive external electric field.
Likewise, finding and improving the performance of Pt
free counter electrode(CE) in DSSCs is widely researched
in energy conversion/storage fields. Hence, here we
also investigated the influence of an electric field on the
adsorption stability and the possible reduction reactions
of I
2
molecule on B-doped, N-doped, B-N co-doped, and
pristine graphene nanosheets. Our results show that
applying an electric field can significantly enhance the
I
2
adsorption and can alter the kinetic properties of
the reduction reaction on N-doped graphene under a
negative electric field, which will be a potential counter
electrode replacement for Pt in DSSC devices. These results
demonstrate that the catalytic activity of a catalyst can be
effectively controlled by means of the electric field.
Speaker Biography
Jyh-Chiang Jiang graduated from National Taiwan University in 1986
with a B.S. in Chemistry and received his PhD in Chemistry in 1994 from
the National Taiwan University. After working as a postdoctoral fellow
at IAMS, he joined the faculty of National Taiwan University of Science
and Technology (NTUST) in 2001. He has more than 170 papers in peer-
reviewed journals. His research has also resulted in 4 patents and has
been serving as an editorial board member of Scientific Reports.
e:
jcjiang@mail.ntust.edu.twJyh-Chiang Jiang, Asian J Biomed Pharmaceut Sci, Volume:9
DOI: 10.4066/2249-622X-C2-019
Notes: