Nano Res.
Electronic Supplementary Material
Natural tea-leaf-derived, ternary-doped 3D porous carbon
as a high-performance electrocatalyst for the oxygen
reduction reaction
Zhaoyan Guo1,§, Zhen Xiao1,§, Guangyuan Ren1, Guozheng Xiao1, Ying Zhu1 (), Liming Dai2 (),
and Lei Jiang3
1
Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment,
Beihang University, Beijing 100191, China
2
Department of Macromolecular Science and Engineering, Case Western Reserve University, Cleveland 10900, USA
3
Beijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
§
These authors contributed equally to this work.
Supporting information to DOI 10.1007/s12274-016-1020-2
Figure S1 SEM images of (a) and (b) HDPC-700, (c) and (d) HDPC-900.
Address correspondence to Ying Zhu, [email protected]; Liming Dai, [email protected]
Nano Res.
Table S1
The BET characteristics of the pristine tea leaves, HDPC-700, HDPC-800, and HDPC-900
2
–1 a
SBET (m ·g )
3
–1 b
Pore volumes (cm ·g )
a
Pristine tea leaves
HDPC-700
HDPC-800
HDPC-900
2.36
130.77
345.76
281.34
0
0.104
0.082
0
b
SBET: specific surface area from multiple BET method; pore volumes: t-plot micropore volume.
Figure S2 The nitrogen adsorption–desorption isotherms and the corresponding pore-size distribution of the pristine tea leaves, HDPC700, HDPC-800 and HDPC-900 calculated from the adsorption branch of nitrogen isotherm by Barrett-Joyner-Halenda (BJH) method.
Figure S3 The EDS spectrum (a) and N (c), P (d), Fe (e) mapping of HDPC-800 (b).
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Figure S4 Raman spectra of the pristine tea leaves, HDPC-700, HDPC-800 and HDPC-900.
Table S2 The XPS elemental data of pristine tea leaves, pristine tea leaves after being immersed in FeCl3 aqueous solution (the immersed
tea leaf), HDPC-700, HDPC-800, and HDPC-900
The pristine tea leaf
The immersed tea leaf
HDPC-700
HDPC-800
HDPC-900
C
70.62
71.12
83.36
86.41
87.43
N
2.40
2.25
2.86
2.74
2.27
O
26.50
25.93
12.24
9.38
8.97
P
0.48
0.46
1.07
1.03
0.89
Fe
—
0.24
0.47
0.44
0.44
Figure S5 The XPS survey (a)–(c), high-resolution C1s (d)–(f) and O1s (g)–(i) spectra of the immersed tea leaf, HPCF-700 and HPCF-900.
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Figure S6 The high resolution (a)–(c) N1s, (d)–(f) Fe2p, and (g)–(i) P2p spectra of the immersed tea leaf, HPCF-700 and HPCF-900.
Figure S7 The relative contents of pyridinic-N, Fe-N, pyrrolic-N and graphitic-N calculated from the deconvoluted high-resolution
nitrogen spectra in HDPC-700, HDPC-800 and HDPC-900.
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Figure S8 The LSV curves and the corresponding K-L plots of HDPC-700 and HDPC-900 at a scanning rate of 10 mV·s–1 with different
rotation speeds of 600, 900, 1,200, 1,600 and 2,000 rpm.
Figure S9 The LSV curves and the corresponding K-L plots of C-700, C-800 and C-900 at a scanning rate of 10 mV·s1 with different
rotation speeds of 400, 600, 900, 1,200, 1,600 and 2,000 rpm.
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Figure S9 (Continued)
Figure S10 (a) The electron transfer number of C-700, C-800 and C-900 within the potentials range of 0.55–0.45 V. (b) The LSV
curves of C-700, C-800, C-900, HDPC-800 and commercial Pt/C, with the rotation speeds of 2,000 rpm and scanning rate of 10 mV·s1.
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