Table 1 Physical and chemical characterization of selected catalysts.

From: Iron-based cathode catalyst with enhanced power density in polymer electrolyte membrane fuel cells

Catalyst

Gas for pyrolysis no. 1

Gas for pyrolysis no. 2 (950 °C)

N content (at %)

Fe content (at %)

Zn content (at %)

Total mass loss (%)

Catalytic activity at 0.8 ViR-free (A g−1)

BET surface area (m2g−1)

Micropore surface area (m2 g−1)

Mesopore surface area (m2 g−1)

1/20/80-Z8-400 °C

Ar

—

NA

0.26

5.94

12.5

0.002

1,237

NA

NA

1/20/80-Z8-700 °C

Ar

—

16.1

0.32

6.71

29.8

0.4

106

0

57

1/20/80-Z8-850 °C

Ar

—

9.4

0.38

2.48

55.0

10

273

209

94

1/20/80-Z8-1050 °C

Ar

—

3.7

0.65

0.06

69.9

254

478

504

46

1/20/80-Z8-1050 °C-15 min

Ar

NH3

5.3

0.78

0.01

87

1,120

964

814

184

1/50/50-BP-1050 °C-60 min

Ar

NH3

2.4

0.44

0

50

429

767

605

162

  1. Pyrolysis gases used, nitrogen content (measured using X-ray photoelectron spectroscopy), bulk iron and zinc content (measured using neutron activation analysis), total mass loss during pyrolysis, catalytic activity (measured in fuel cell), BET surface area, micropore surface area and mesopore surface area for selected catalysts.
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