RSC Advances
ARTICLE
6RA0596
DOI: 10.1039Jo/Curnal Na1Ame
b
obtained from RRDE study. To study the methanol tolerance
behaviour of the catalyst, ORR was performed in 0.1 N KOH
solution containing 1 M methanol. A Biologic VSP Model
potentiostat was employed for electrochemical studies. A three
electrode glass cell containing catalyst coated RDE/RRDE, a
Hg/HgO, 0.1N aq. KOH reference electrode and carbon felt
Physical and Materials Chemistry Division, CSIRꢀNational Chemical
Laboratory (NCL), Pune, 411008, India
c
Academy of Scientific and Innovative Research (AcSIR), New Delhi,
India.
d
Department of Chemistry, Indian Institute of Technology Madras, Chennai,
counter electrode was used for electrochemical studies. 600036, India
Potential measured against Hg/HgO, 0.1 N KOH electrode was Electronic Supplementary Information (ESI) available: Crystallographic
converted into reversible hydrogen electrode scale (RHE).
parameters, Hꢀbond tables, schemes for catalysis products, figures for
Instead of platinum based counter electrode, carbon felt was
band gap energy, recyclability of the catalyst, additional figure for
chosen to avoid contamination of the working electrode with
magnetic and ORR measurements, PXRD, TGA and IR. See
platinum during electrochemical measurement.
DOI: 10.1039/b000000x/
Impedance Analysis
The alternating current (AC) impedance measurements were
carried out by two electrode probe configuration set up, using
BioLogic VPM3 electrochemical work station connected to a
temperature controllable incubator (SHꢀ241, ESPEC Co. Ltd.,
Japan). Compound 1 was finely grounded and then evacuated at 100
ºC under vacuum. The evacuated powder was then pressed to a pellet
using a standard die (13 mm diameter). The incubator was initially
1
2
3
4
S. M. Cohen, Chem. Rev., 2012, 112, 970.
N. Stock and S. Biswas, Chem. Rev., 2012, 112, 933.
M. Kurmoo, Chem. Soc. Rev., 2009, 38, 1353.
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Soc., 2009, 132, 922; b) M. Yoon, R. Srirambalaji, K. Kim, Chem.
Rev., 2012,112, 1196; c) A. Dhakshinamoorthy, M. Alvaro, A.
Corma, H. Garcia, Dalton Trans., 2011, 40, 6344.
flushed with N before the measurements to remove moisture. The
2
pellet was heated slowly and held at desired temperature for ~ 1 h
before the analysis, to attain saturation. The pellet was subjected
then to AC impedance analysis and the frequency was swept in the
range of 1MHz−100Hz and 10 mV input voltage amplitude. The
resistance was calculated by fitting the semicircle of the Nyquist
plot. The activation energy was determined from the slope of
Arrhenius plot.
5
a) P. Ramaswamy, N. E. Wong, G. K. H. Shimizu, Chem. Soc.
Rev. 2014, 43, 5913; b) M. Yoon, K. Suh, S. Natarajan, K. Kim,
Angew. Chem. Int. Ed. 2013, 52, 2688.
6
7
Z. Hu, B. J. Deibert, J. Li, Chem. Soc. Rev. 2014, 43, 5815.
(a) S. R. Ahrenholtz, C. LandaverdeꢀAlvarado, M. Whiting, S.
Lin, C. Slebodnick, E. Marand, A. J. Morris. Inorg. Chem. 2015,
5
4, 4328; (b) C. Wang, F. Sun, K. Zhnag, C. Zheng, Inorg. Chem.
Conclusions
Commun. 2014, 48, 65; (c) XꢀM. Wang, RꢀQ. Fan, LꢀS. Qiang, P.
Wang, YꢀL. Yang, YꢀL. Wang, Dalton Trans. 2014, 43, 16152;
We have synthesized
a
new coordination polymer,
, using solvent diffusion
1 exhibit interesting structural features,
[
Cu (PDA) (Ald) (H O) ]. 8H O, 1
2 2 2 2 2 2
(d) J. Xu, W. P. Su, M. C. Hong, Cryst. Growth Des. 2011, 11,
technique. Compound
3
37.
water and thermal stability. The presence of oneꢀdimensional
water cluster chain with decameric water cluster is noteworthy.
The optical absorption associated with band gap measurements
show this compound is semiconductor in nature. The magnetic
measurements exhibit the paramagnetic behaviour. Further the
compound is shown as a selective recyclable heterogeneous
catalyst for styrene and cyclohexene oxidation. Compound
shows facile oxygen reduction reaction (ORR) and can be used
a promising Ptꢀfree cathode in alkaline Direct Methanol Fuel
8
9
1
(a) S. Sanda, S. Goswami, H. S. Jena, S. Parshamoni, S. Konar,
Cryst. Eng. Commu. 2014, 16, 4742; (b) S. Sanda, S. Parshamoni,
S. Konar, Inorg. Chem. 2013, 52, 12866.
(a) B. K. Tripuramallu, S. Mukherjee, S. K. Das, Cryst. Growth
Des. 2012, 12, 5579; (b) B. K. Tripuramallu, S. K. Das, Cryst.
Growth Des 2013, 13, 2426.
1
0
R. Ghosh, K. S. Asha, S. M. Pratik, A. Dutta, R. Nath, S. Mandal,
RSC Advances 2014, 4, 21195.
Cell (DMFC). Compound
1 also demonstrates potential proton
conductivity because of the presence of water cluster chain,
which is appropriate pathways for proton transporting. These
results may encourage researchers to explore new
multifunctional coordination polymers for proton transporting
and alternating cathode for Ptꢀfree DMFC.
11 J. Liu, L. Chen, H. Cui, J. Zhang, L. Zhang, CꢀY. Su, Chem.
Soc. Rev. 2014, 43, 6011.
1
2
(a)Y. Qi, Y. Luan, J. Yu, X. Peng, G. Wang, Chem. Eur. J. 2015,
1, 1589; (b) A. Dhakshinamoorthy, M. Alvaro, H. Garcia, J.
2
Catal. 2012, 289, 259.
1
3
a) L.ꢀL. Han, T.ꢀP. Hu, J.ꢀS. Chen, Z.ꢀH. Li, X.ꢀP. Wang, Y.ꢀQ.
Zhao, X.ꢀY. Li, D. Sun, Dalton Trans. 2014, 43, 8774; b) L.
Infantes, J. Chisholm, S. Motherwell, Cryst. Engg. Commun.
2003,
Acknowledgements
We acknowledge financial support from Council of Scientific
Research (CSIR), Govt. of India, through a grant 01(2778)/14/EMRꢀ
II. We are grateful to Prof. V. Ramakrishnan for encouragement and
N. Ahmed for the help regarding magnetic measurements.
5, 480; c) L. Infantes, S. Motherwell, Cryst. Engg. Commun. 2002,
4
, 454.
Notes and references
School of Chemistry
1
1
4
a) B.ꢀQ. Ma, H.ꢀL. Sun, S. Gao, Chem. Commun. 2004, 2220; b)
a
K.
Indian Institute of Science Education and Research Thiruvananthapuram,
Kerala, Indiaꢀ695016
Liu, M. G. Brown, J. D. Cruzan, R. J. Saykally, Science 1996, 271,
6
1
2; c) A. H. Narten, W. E. Thiessen, L. Blum, Science 1982, 217,
Fax: (+91) 471ꢀ2597ꢀ438
033.
Eꢀmail: sukhendu@iisertvm.ac.in
5 a) CꢀK. Lin, D. Zhao, WꢀY. Gao, Z. Yang, J. Ye, T. Xu, Q. Ge, S.
Homepage: http://iisertvm.ac.in/~sukhendum
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