Table 1 Turnover frequencies and activation energies.*

From: Low-temperature carbon monoxide oxidation catalysed by regenerable atomically dispersed palladium on alumina

 

Pd/alumina

Pd/La-alumina

Pd metal †

Turnover frequencies (s−1)

 

70 °C

125 °C

70 °C

125 °C

70 °C

125 °C

 First run‡

3.8 × 10−4

1.6 × 10−3

1.9 × 10−3

7.5 × 10−3

1.3 × 10−4

2.5 × 10−3

 Second run

9.7 × 10−5

2.4 × 10−4

1.2 × 10−3

5.6 × 10−3

6.2 × 10−5

2.0 × 10−3

Activation energies (kJ mol−1)

 First run‡

39.4

37.4

56.5

 Second run

22.2

34.3

56.5

  1. *0.5 wt% Pd.
  2. †Reference values obtained from a pure Pd metal powder.
  3. ‡The first CO oxidation light-off run was performed after the sample was calcined at 700 °C for 30 min in air.
  4. After the reactor reached the maximum temperature of 300 °C, the sample was cooled to room temperature and a second CO oxidation light-off run was performed.
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