Table 2 Structural parameters of fresh and spent catalysts obtained by Ru K-edge EXAFS curve fitting analysis

From: Pt-doped Ru nanoparticles loaded on ‘black gold’ plasmonic nanoreactors as air stable reduction catalysts

Sample

Bond

Coordination Number

Bond length, r (Å)

Debye-Waller factor, σ (Å2)

R (%)a

Ru powder

Ru–Ru

12.3(0.5)

2.67(1)

0.0048(0)

14.7

RuO2

Ru–O

1.8(9)

1.93(3)

0.0014(4)

11.1

Ru–O

4.1(5)

2.01(2)

0.0022(0)

DPC/RuPt-10-calc

Ru–O

2.7(1.0)

1.94(3)

0.0044(1)

12.0

Ru–O

4.3(5)

2.03(3)

0.0053(0)

DPC/RuPt-10-spent (with air)

Ru–O

1.6(1.2)

1.98(2)

0.0076(60)

5.0

Ru–Ru

6.3(2)

2.67(1)

0.0067(5)

Ru–Pt

1.9(1.0)

2.65(3)

0.0053(16)

DPC/RuPt-10-spent (without air)

Ru–Ru

6.6(1.7)

2.67(1)

0.0050(5)

11.3

Ru–Pt

1.6(1.0)

2.64(3)

0.0037(30)

  1. a\(R=(\sum ( {{{{{\rm{k}}}}}}^{3} {\chi}^{data}({{{{{\rm{k}}}}}})- {{{{{\rm{k}}}}}}^{3}{\chi }^{fit}({{{{{\rm{k}}}}}}))^{2})^{\frac{1}{2}}/(\sum ({{{{{\rm{k}}}}}}^{3} {\chi}^{data}({{{{{\rm{k}}}}}}))^{2})^{1/2}\) Figures in parentheses show errors.
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