Table 1 Coordination numbers and bond lengths.

From: Catalysis on singly dispersed bimetallic sites

Reaction temperature

Reactants

Measurement condition

N(Rh–O)

N(Rh–Co)

N(Rh–Rh)

R(Rh–O) (Å)

R(Rh–Co) (Å)

150 °C

O2

25 °C, O2

4.5±0.6

0.3±0.4

0

2.033±0.008

2.55±0.03

300 °C

H2

25 °C, CO+NO

2.6±1.0

1.8±0.9

0

2.13±0.04

2.61±0.02

400 °C

CO+NO

25 °C, CO+NO

1.7±0.5

1.3±0.7

0

2.15±0.03

2.60±0.02

  1. Coordination number of O, Co and Rh atoms around a Rh atom and bond lengths of Rh–O and Rh–Co based on EXAFS studies of precursor of Rh1Co3/CoO catalyst at 150 °C in 5% O2, 300 °C in 5% H2 and of catalyst of Rh1Co3/CoO during catalysis at 400 °C in a mixture of 5% CO+5% NO.
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