「国内外で開催される国際会議等出席促進事業」第Ⅰ期

様式５
Form 5
採択カテゴリー
（採択者記載）
平成２６年度北海道大学
１
「国内外で開催される国際会議等出席促進事業」第Ⅰ期報告書
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2014 年 9 月
北海道大学総長
殿
9 日
(Year / Month / Day)
To the President, Hokkaido University
所属部局
Graduate School of Chemical
/ Graduate School
Sciences and Engineering
Graduate School of Chemical
専攻・講座（部門）/ Department & Division
Sciences and Engineering
課程・学年
氏
会
議
名
名
/ Title of Conference
会議開催期間
/ Duration of Conference
開
催
地
/ Conference Venue
/ Role in Conference
第 65 回定例年会
th
65 Annual Meeting of the International Society of Electrochemistry
2014
年 8 月
31 日～ 2014
(Year / Month / Day)
年 9
月 5 日
(Year / Month / Day)
Lausanne, Switzerland
（□にチェックを入れる
会議における役割
Elumalai Ganesan
/ Name
(In Japanese) 国際電気化学会
(In English)
DC3
/ Course (MC / DC) & Year
□ 口頭発表
/ Please put a checkmark in the box.）
/ Oral Presentation
√
ポスター発表 / Poster Presentation
□ その他 / Others （
）
The meeting was illustrated about the central role played by
会議の概略
electrochemistry in different fields ranging from analytical chemistry
（例：規模、参加国数、参加者
to solar cells, from corrosion to fuel cells, from transportation to DNA
数等）
sequencing. Above all, electrochemistry is a fundamental science at the
/ Summary of Conference
frontier between physics, chemistry and biology. The objective of the
(e.g. positioning of conference,
meeting was to cover the state-of-the-art progress in the understanding
number of participating
of charge transfer reactions and to present the latest developments in
countries and participants)
emerging applications. There was about 60 countries and 1800
participants.
様式５
Form 5
Oxygen reduction reaction (ORR) is one of the most important
processes in fuel cells as well as in biological system. Pt based
electrocatalyst is most efficient for ORR with low overpotential.
However, due to high cost, less abundance, poor stability in
electrochemical environment, and still sluggish kinetics of Pt based
catalysts; there are worldwide research efforts to find non-precious
metal catalysts. N- and B-doped carbon materials have been
demonstrated to be effective metal free ORR catalysts and one may
expect the increase of ORR activity by the substitution of carbon atoms
in graphene by B and N atoms. If all carbon atoms in graphene are
substituted by B and N atoms, hexagonal boron nitride (h-BN)
monolayer, which has geometric structure similar to the graphene, cab
be obtained. Boron nitride (BN), which is an insulator with a wide band
gap, supported on Au is theoretically predicted to act as electrocatalyst
発表内容
/ Summary of your presentation
for oxygen reduction reaction (ORR). DFT calculations show that the
band gap of free h-BN monolayer is 4.6 eV but a slight protrusion of the
unoccupied BN states towards the Fermi level is observed if BN is
supported on Au(111) due to the BN-Au interaction. Theoretically
predicted metastable configuration of O2 on h-BN/Au(111), which can
serve as precursors for ORR, and free energy diagrams for ORR on
h-BN/Au(111) via two- and four-electron pathways show that ORR to
H2O2 is possible at this electrode. Electrocatalytic activities of various
types of h-BN, i.e., spin coated BN nanotube (BNNT) and BN
nanosheet (BNNS) and sputter deposited BN, on Au electrodes as well
as those of BNNS modified glassy carbon (GC) and Pt electrodes for
oxygen reduction reaction (ORR) were examined in O2 saturated 0.5M
H2SO4 solution based on the theoretical prediction. The overpotential
for ORR at Au electrode was reduced by ca. 100, ca. 270, and ca.150 mV
by spin coating of the dispersion of BNNT and liquid exfoliated BNNS,
and sputter deposition of BN, respectively, proving the theoretical
prediction.
I have discussed with various fields of experts and got few
会議に参加した成果
（例：語学力、発表能力等）
/ Benefit derived from
participation (e.g. language
skills, presentation skills)
ideas about the problems and solutions of a complete fuel cell
operation. I have learned few new electrochemical techniques like
Scanning electrochemical microscopy and Scanning electrochemical
cell microscopy etc., to study the active site for ORR, which may
helpful my research studies. And also I believe this conference
improved my presentation skills.
様式５
Form 5
It was a wonderful experience, talking with the people from
various countries and different parts of Japan, which helped me to
develop my scientific thinking and approach. It was also a very good
感
想
/ Comments
opportunity for me to learn their culture, climate, infrastructure
and day today activities.
※この報告書は本学ホームページに掲載します。
/ This report will be put on the Hokkaido University website.

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