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Supplementary Material
The effect of carbon support on the oxygen reduction activity and
durability of single-atom iron catalysts
Jin-Cheng Li1, 2, Dai-Ming Tang1, Peng-Xiang Hou1, Guo-Xian Li, Min Cheng1,
Chang Liu1,* Hui-Ming Cheng1,3
1Shenyang National Laboratory for Materials Science, Institute of Metal Research,
Chinese Academy of Sciences, Shenyang 110016, PR China.
2Fok Ying Tung Research Institute, Hong Kong University of Science and
Technology, Guangzhou 511458, PR China.
3Tsinghua-Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 5108055, PR
China
E-mail: [email protected] (C. Liu); [email protected] (P.X. Hou)
Material Characterization
The catalysts were characterized by using transmission electron microscopy
(Tecnai F20, 200 kV; Titan G 60-300 S/TEM, 300 kV), X-ray photoelectron
spectroscopy (XPS, Escalab 250, Al Kα), inductively coupled plasma mass
spectrometry (ICP-MS, Perkin Elmer Optima 4300 DV), thermogravimetric analyzer
(NETZSCH STA 449C), and Raman spectroscopy (Jobin Yvon HR800). The specific
surface area and pore structure of the samples were investigated with an automatic
volumetric sorption analyzer (ASAP 2020 M) using N2 as the adsorbate at -196 oC.
Figure S1. Raman spectra of CNF-900@Fe-N-C, CNF-1100@Fe-N-C, and
CNT@Fe-N-C.
Figure S2. TGA curves of CNF-900@Fe-N-C, CNF-1100@Fe-N-C, and CNT@Fe-
N-C.
Figure S3. (a) STEM image of CNT@Fe-N-C and (b) the corresponding EDS
elemental maps of C, N, O, and Fe within the square area in (a). (c) STEM image of
CNT@Fe-N-C, and (d) the corresponding EDS spectrum.
Figure S4. TOF of CNF-900@Fe-N-C, CNF-1100@Fe-N-C, and CNT@Fe-N-C at
potentials of (a) 0.7 V and (b) 0.6 V.
Table S1. Elemental composition and specific surface area of core-shell
nanostructured single-atom Fe catalysts.
MaterialsCa) at.
%
N at.
%
O at.
%
SBET (m2
g-1)
Feb)
wt.%
Zn wt.
%
CNF-900@Fe-N-C 85.1 6.0 8.9 1401 1.91 0.010
CNF-1100@Fe-N-C 86.4 6.6 7.0 1408 1.84 0.016
CNT@Fe-N-C 89.6 5.6 4.8 1140 1.92 0.014
a) The atom fractions of C, N and O were measured from XPS characterization.
b) The mass fractions of Fe and Zn were measured from ICP-MS analysis.
Table S2. Summary of ORR catalytic activities of our catalysts and those of Fe-N-C
catalysts in an acidic medium (electrode rotation speed 1600 rpm), as reported in the
literature.
Reference MaterialsCatalyst loading
(mg cm-2)E1/2 (mV)
E1/2 (mV) versus Pt/C
J. Am. Chem. Soc. 2013, 135, 16002-16005
PANI-Fe/Silica colloid
0.6 790-58
Pt/C (20 wt% Pt) 0.1 848
Angew. Chem. Int. Ed. 2013, 52, 8349-8353
PFeTTPP-1000Pt/C (20 wt% Pt)
0.40.4
760850
-90
Adv. Energy Mater. 2014, 4
Fe-N-HCMS 0.5 Eonset=800-120
Pt/C (10 wt% Pt) 0.25 Eonset=920
J. Am. Chem. Soc. 2015, 137, 5414-5420
CPANI-Fe-NaCl 0.6 ~730-58
Pt/C (40 wt% Pt) 0.125 ~790
Nano Energy. 2016, 25, 110-119
C-Fe-Z8-Ar 0.56 820-40
Pt/C (20 wt% Pt) 0.1 860
This workCNT@Fe-N-PC 0.2 820
0Pt/C (20 wt% Pt) 0.1 820
