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Journal of Materials Chemistry A
Journal Name
ARTICLE
high selectivity for ORR with a strong tolerance to crossover
effects.
Notes and references
1
E. Proietti, F. Jaouen, M. Lefevre, ND. OLIa:r1o0u.1c0h39e/,CJ8.TAT0ia0n43, 9JK.
Herranz, J.P. Dodelet, Nat. Commun., 2011, , 416.
T. Sun, B. Tian, J. Lu, C. Su, J. Mater. Chem. A, 2017,
Furthermore, the long-term stability of Co/N-BCNTs was
also confirmed by CA measurements. Figure 7f shows only 5 %
current reduction for the Co/N-BCNTs catalyst after a 12 h CA
test, whereas more than 11 % of its initial activity was lost for
the Pt/C catalyst under the same condition (0.7 V with O2
continuous flow in 0.1 M KOH), further proving a superb
durability of the Co/N-BCNTs catalyst toward ORR. It may be
attributed to that encapsulated Co nanoparticles are physically
isolated from the harsh environment and thus avoiding
leaching.
It has been demonstrated that encapsulated the metallic
nanoparticles in CNTs could improve electrocatalystic activity
because of the electronic interaction between CNTs and metal
nanoparticles26, 46. What’s more, well-dispersed N dopants,
appropriate degree of graphitization and suitable surface area
of Co/N-BCNTs are all beneficial to ORR activities, which is
agreement with the ORR test of Co/N-BCNTs. It has been
confirmed that Co/N-BCNTs exhibited the best ORR
performance in terms of onset potential, half-wave potential
and limiting current density.
2
2
3
5, 18933
D. He, H. Tang, Z. Kou, M. Pan, X. Sun, J. Zhang, S. Mu, Adv.
Mater., 2017, 29, 1601741.
4
5
6
7
8
9
M. Yu, Z. Wang, C. Hou, Z. Wang, C. Liang, C. Zhao, Y. Tong, X.
Lu, S. Yang, Adv. Mater., 2017, 29, 1602868.
M. Zeng, Y. Liu, F. Zhao, K. Nie, N. Han, X. Wang, W. Huang, X.
Song, J. Zhong, Y. Li, Adv. Funct. Mater., 2016, 26, 4397-4404.
Z Peng, S. A. Freunberger, Y. Chen, P. G. Bruce, Science, 2012,
337, 563-566.
Z. Wu, X. Wang, J. Huang, F. Gao, J. Mater. Chem. A, 2018, 6,
167
M. Blasco-Ahicart, J. Soriano-López, J.J. Carbó, J.M. Poblet,
J.R. Galan-Mascaros, Nat. chem., 2017.
L. Yu, H. Zhou, J. Sun, F. Qin, D. Luo, L. Xie, F. Yu, J. Bao, Y. Li,
Y. Yu, S. Chen, Z. Ren, Nano Energy, 2017, 41, 327-336.
10 M.K. Debe, Nature, 2012, 486, 43-51.
11 M. Sun, D. Davenport, H. Liu, J. Qu, M. Elimelech, J. Li, J.
Mater. Chem. A.
12 C. Zhang, S. Y. Hwang, A. Trout, Z. Peng, J. Am. Chem. Soc.,
2014, 136, 7805−7808.
13 C. Zhang, W. Sandorf, Z. Peng, ACS Catal., 2015,
5,
2296−2300.
14 J.A. Varnell, E.C. Tse, C.E. Schulz, T.T. Fister, R.T. Haasch, J.
Timoshenko, A.I. Frenkel, A.A. Gewirth, Nat. Commun., 2016,
7
, 12582.
4. Conclusions
15 M. Hu, J. Reboul, S. Furukawa, N.L. Torad, Q. Ji, P. Srinivasu,
K. Ariga, S. Kitagawa, Y. Yamauchi, J. Am. Chem. Soc., 2012,
134, 2864-2867.
In conclusion, we have demonstrated a facile and effective
method to synthesize nitrogen-doped carbon nanomaterials
with tunable dimensions and structures via a directed growth
of ZIFs arrays on g-C3N4 followed by a heat treatment. By
tuning the content of Co and Zn on the g-C3N4 layer, 1D
nitrogen-doped bamboo-like carbon nanotubes encapsulated
Co nanoparticles, 2D nitrogen-doped carbon nanosheets and
16 J. Ni, Y. Li, Adv. Energy. Mater., 2016, 6, 1600278.
17 W.J. Jiang, L. Gu, L. Li, Y. Zhang, X. Zhang, L.J. Zhang, J.Q.
Wang, J.S. Hu, Z. Wei, L.J. Wan, J. Am. Chem. Soc., 2016, 138
,
3570-3578.
18 Y. Han, Y. Wang, W. Chen, R. Xu, L. Zheng, J. Zhang, J. Luo, R.
Shen, Y. Zhu, W. Cheong, C. Chen, Q. Peng, D. Wang, Y. Li, J.
Am. Chem. Soc., 2017, 139, 17269-17272.
3D
nitrogen-doped
carbon
nanotubes
frameworks
19 J. Zhang, L. Qu, G. Shi, J. Liu, J. Chen, L. Dai, Angew. Chem.,
2016, 55, 2230-2234.
encapsulated Co nanoparticles electrocatalysts have been
successfully obtained. All of them have hierarchical
nanostructures and uniform heteroatom doping. The newly
designed Co/N-BCNTs catalyst exhibits a high ORR activity in
alkaline medium. Meanwhile, the excellent durability and
extraordinary methanol tolerance are even better than
commercial Pt/C catalyst. More importantly, this progress
provides a new path to regulate the dimensions and structures
of N-doped carbon nanomaterials and may be extended to
prepare other carbon nanomaterials/metal nanoparticles
hybrids toward electrocatalytic reactions.
20 Y. Yao, Z. Chen, A. Zhang, J. Zhu, X. Wei, J. Guo, W. D. Wu, X.
D. Chen and Z. Wu, J. Mater. Chem. A, 2017, 5, 25237
21 K. Hata, D. N. Futaba, K. Mizuno, T. Namai, M. Yumura, S
Lijima, Science, 2004, 306, 1362-1364.
22 J. Liang, R.F. Zhou, X.M. Chen, Y.H. Tang, S.Z. Qiao, Adv.
Mater., 2014, 26, 6074-6079.
23 C. Zhu, S. Fu, J. Song, Q. Shi, D. Su, M.H. Engelhard, X. Li, D.
Xiao, D. Li, L. Estevez, D. Du, Y. Lin, Small, 2017, 1603407.
24 Y. Liu, Y. Shen, L. Sun, J. Li, C. Liu, W. Ren, F. Li, L. Gao, J. Chen,
F. Liu, Y. Sun, N. Tang, H. Cheng, Y. Du, Nat. Commun., 2016,
7
, 10921.
25 X. Cui, S. Yang, X. Yan, J. Leng, S. Shuang, P.M. Ajayan, Z.
Zhang, Adv. Funct. Mater., 2016, 26, 5708-5717.
26 D. Deng, L. Yu, X. Chen, G. Wang, L. Jin, X. Pan, J. Deng, G.
Sun, X. Bao, Angew. Chem., 2013, 52, 371-375.
Conflicts of interest
There are no conflicts to declare.
27 A. K. Geim, Science, 2009, 324, 1530-1534.
28 H. Yu, L. Shang, T. Bian, R. Shi, G.I. Waterhouse, Y. Zhao, C.
Zhou, L.Z. Wu, C.H. Tung, T. Zhang, Adv. Mater., 2016, 28
5080-5086.
,
29 C. Zhang, B. Wang, X. Shen, J. Liu, X. Kong, S. S. C. Chuang, D.
Yang, A. Dong, Z. Peng, Nano Energy,2016, 30, 503-510.
30 Z. Li, M. Shao, Q. Yang, Y. Tang, M. Wei, D.G.Evans, X. Duan,
Nano Energy, 2017, 37, 98-107
31 T.Y. Ma, S. Dai, M. Jaroniec, S.Z. Qiao, Angew. Chem., 2014,
53, 7281-7285.
Acknowledgements
This work was financially supported by the National Natural
Science Foundation of China (21722704), and the Science and
Technology
Commission
of
Shanghai
Municipality
(16DZ1204300, 15DZ2281400 and 16JC1401700).
This journal is © The Royal Society of Chemistry 20xx
J. Name., 2013, 00, 1-3 | 7
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