Pleas De ad l to o nn oT tr aa nd sj au cs t ti omn as rgins
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Journal Name
Relative large contact surface and good electrical conductivity 7.
also boosts the electrocatalytic performance. Compared with
Co@NC, the P atoms doping in Co@NC-P(3-1) increases the
F. J. DiSalvo and H. D. Abruna, NatDuOreI:m10a.1t0e3ri9a/lCs,8D20T01436, 5102F,
8
1-87.
8
.
Y. Liang, Y. Li, H. Wang, J. Zhou, J. Wang, T. Regier and H.
Dai, Nature materials, 2011, 10, 780-786.
exposed active sites and induces synergistic effect between N
and P atoms, enhancing its ORR activity. As for Co@NC-P(5-1)
and Co@NC-P(1-1), the limited N- and P-doping affects their
kinetic processes of ORR.
9
.
J. Greeley, I. E. Stephens, A. S. Bondarenko, T. P. Johansson,
H. A. Hansen, T. F. Jaramillo, J. Rossmeisl, I. Chorkendorff
and J. K. Norskov, Nature chemistry, 2009, 1, 552-556.
V. R. Stamenkovic, B. Fowler, B. S. Mun, G. Wang, P. N.
Ross, C. A. Lucas and N. M. Markovic, Science, 2007, 315,
1
0.
Conclusions
4
93-497.
1
1
1.
2.
M. K. Debe, Nature, 2012, 486, 43-51.
In summary, a N, P‑doped carbon with encapsulated Co NPs was
synthesized as efficient ORR catalyst from pyrolysis of a mixture
of Co-MOF and triphenylphosphine with mass ratio of 3:1. In
this catalyst, Co NPs are wrapped by graphitic carbon shell, free
from corrosion in the alkaline solution. The N and P atoms were
in situ doped into the carbon matrix, promoting active sites
towards ORR. Compared with its counterparts, the catalyst
D. S. Su and G. Sun, Angewandte Chemie, 2011, 50, 11570-
1
1572.
1
3.
C. Chen, Y. Kang, Z. Huo, Z. Zhu, W. Huang, H. L. Xin, J.
D.Snyder, D. Li, JeffreyA.Herron, ManosMavrikakis,
MiaofangChi, K. L.More, Y. Li, NenadM.Markovic, G.
Somorjai, P. Yang and V. Stamenkovic, Science, 2014, 343,
1
339-1343.
shows a superior ORR performance with more positive onset 14.
and half-wave potentials of 0.88 and 0.80 V and much larger
limiting current density of –5.93 mA cm , which surpasses the 15.
H. L. Liu, F. Nosheen and X. Wang, Chemical Society
reviews, 2015, 44, 3056-3078.
F. Hu, H. Yang, C. Wang, Y. Zhang, H. Lu and Q. Wang, Small,
-2
2
017, 13.
commercial 20 % Pt/C, in addition to the durability and
1
1
1
1
6.
7.
8.
9.
Y. Tang, B. L. Allen, D. R. Kauffman and A. Star, J. AM.
CHEM. SOC., 2009, 131, 13200–13201.
resistance to methanol in 0.1 M KOH. The enhanced ORR
activity of Co@NC-P(3-1) can be attributed to the synergistic
effect between Co NPs and N, P atoms, the larger contact
surface, more exposed active sites and good electrical
conductivity. This work would provide some new ideas for
designing and constructing promising carbon based non-
precious metal electrocatalysts for future practical fuel-cell
applications.
H. Singh, N. Iyengar, R. Yadav, A. Rai and A. K. Sinha,
Sustainable Energy & Fuels, 2018, 2, 1699-1706.
H. Tang, H. Yin, J. Wang, N. Yang, D. Wang and Z. Tang,
Angewandte Chemie, 2013, 52, 5585-5589.
G. Wu, K. L. More, C. M. Johnston and P. Zelenay, Science,
2
011, 332, 443-447.
20.
S. Yasuda, A. Furuya, Y. Uchibori, J. Kim and K. Murakoshi,
Advanced Functional Materials, 2016, 26, 738-744.
S. Zhang, Y. Zhang, W. Jiang, X. Liu, S. Xu, R. Huo, F. Zhang
and J.-S. Hu, Carbon, 2016, 107, 162-170.
2
2
2
2
1.
2.
3.
4.
Conflicts of interest
There are no conflicts to declare.
M. Sun, D. Davenport, H. Liu, J. Qu, M. Elimelech and J. Li,
Journal of Materials Chemistry A, 2018, 6, 2527-2539.
Q. Cheng, L. Yang, L. Zou, Z. Zou, C. Chen, Z. Hu and H. Yang,
ACS Catalysis, 2017, 7, 6864-6871.
L. C. Pardo Pérez, N. R. Sahraie, J. Melke, P. Elsässer, D.
Teschner, X. Huang, R. Kraehnert, R. J. White, S. Enthaler,
P. Strasser and A. Fischer, Advanced Functional Materials,
Acknowledgements
This work was supported by the National Natural Science
Foundation of China (Grant Nos. 21601205, 21571187,
2
018, 28, 1707551.
2
1501198), Taishan Scholar Foundation (ts201511019), and the
Fundamental Research Funds for the Central Universities
18CX02047A, 18CX07001A)
2
2
2
5.
6.
7.
S. Chen, J. Cheng, L. Ma, S. Zhou, X. Xu, C. Zhi, W. Zhang, L.
Zhi and J. A. Zapien, Nanoscale, 2018, 10, 10412-10419.
A. M. Alexander and J. S. Hargreaves, Chemical Society
reviews, 2010, 39, 4388-4401.
(
Y. N. Regmi, G. R. Waetzig, K. D. Duffee, S. M. Schmuecker,
J. M. Thode and B. M. Leonard, Journal of Materials
Chemistry A, 2015, 3, 10085-10091.
J. Luo, X. Tian, J. Zeng, Y. Li, H. Song and S. Liao, ACS
Catalysis, 2016, 6, 6165-6174.
M. D. Meganathan, S. Mao, T. Huang and G. Sun, Journal of
Materials Chemistry A, 2017, 5, 2972-2980.
S. Wang, L. Zhang, Z. Xia, A. Roy, D. W. Chang, J. B. Baek
and L. Dai, Angewandte Chemie, 2012, 51, 4209-4212.
J. Duan, S. Chen, M. Jaroniec and S. Z. Qiao, ACS Catalysis,
2015, 5, 5207-5234.
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