Table 1 Structure parameters of Ni-Ce(OH)3/CeO2 and reconstructed Ni-Ce(OH)3/CeO2 derived from the Ni K-edge EXAFS fitting results

From: Reaction-induced regioselective reconstruction of Ni-doped Ce(OH)3/CeO2 enables exceptional activity and selectivity for reverse water-shift reaction

Sample

Paths

N

R (Å)

σ2 (×10−3 Å2)

R factor

NiO

Ni−O

6.0 ± 0.5

2.07 ± 0.02

5.8 ± 1.3

0.013

Ni−O

12.0 ± 0.3

2.95 ± 0.05

6.0 ± 0.6

Ni-Ce(OH)3/CeO2

Ni−O

2.1 ± 0.6

2.10 ± 0.13

11.6 ± 2.8

0.010

Ni−O

4.1 ± 0.9

2.93 ± 0.05

10.8 ± 3.7

Reconstructed

Ni-Ce(OH)3/CeO2

Ni−O

1.4 ± 0.6

2.12 ± 0.18

7.0 ± 2.0

0.014

Ni−Ni

5.5 ± 1.0

2.42 ± 0.25

10.4 ± 1.5

Ni−O

5.8 ± 1.0

2.89 ± 0.14

9.4 ± 0.5

Ni foil

Ni−Ni

6.0 ± 0.6

2.49 ± 0.03

5.1 ± 0.6

0.006

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