Acta Physico-Chimica Sinica ›› 2020, Vol. 36 ›› Issue (1): 1907008.doi: 10.3866/PKU.WHXB201907008
Special Issue: Special Issue in Honor of Academician Youqi Tang on the Occasion of His 100th Birthday
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Lifang Chen1,Yulv Yu1,Masako Kuwa2,Tao Cheng1,Yan Liu1,Hiroshi Murakami3,Harada Masafumi2,*(),Yuan Wang1,*(
)
Received:
2019-07-01
Accepted:
2019-07-26
Published:
2019-08-02
Contact:
Harada Masafumi,Yuan Wang
E-mail:harada@cc.nara-wu.ac.jp;wangy@pku.edu.cn
Supported by:
MSC2000:
Lifang Chen,Yulv Yu,Masako Kuwa,Tao Cheng,Yan Liu,Hiroshi Murakami,Harada Masafumi,Yuan Wang. Insight into the Formation Mechanism of "Unprotected" Metal Nanoclusters[J].Acta Physico-Chimica Sinica, 2020, 36(1): 1907008.
Table 1
Fitting parameters of the Pt―Cl, Pt―O, and Pt―Pt bonds obtained from the Pt L3-edge EXAFS spectra of reaction mixture for preparing unprotected Pt nanoclusters."
Time/min | T/℃ | Bond | CN | r/Å | ΔE/eV | σ2/Å2 | R/% |
0 | RT (24.9) | Pt―Cl | 4.86 | 2.31 | 12.24 | 0.0027 | 0.24 |
7 | 78.3 | Pt―Cl | 3.05 | 2.32 | 12.22 | 0.0030 | 0.71 |
Pt―O | 1.62 | 2.01 | 10.54 | 0.0009 | |||
9 | 80.0 | Pt―Cl | 2.09 | 2.33 | 14.97 | 0.0026 | 0.61 |
Pt―O | 2.98 | 2.05 | 11.83 | 0.0051 | |||
10 | 80.0 | Pt―O | 1.97 | 2.13 | 7.75 | 0.0037 | 0.95 |
Pt―Pt | 3.20 | 2.74 | 5.53 | 0.0046 | |||
11 | 80.0 | Pt―Pt | 5.34 | 2.74 | 5.53 | 0.0074 | 0.45 |
90 | 80.0 | Pt―Pt | 9.09 | 2.76 | 8.82 | 0.0076 | 1.77 |
Fig 7
In situ characterization of colloidal nanoclusters. (a) UV-Vis absorption spectra of RuCl3 glycol solution and RuCl3-NaOH/EG solution; (b) The in situ UV-Vis absorption spectra of reaction mixture for preparing unprotected Ru nanoclusters under different condition; (c) Ru K-edge XANES spectra of Ru powder, RuCl3 glycol solution, and RuO2 powder; (d) Time evolution of Ru K-edge XANES spectra of reaction mixture for preparing unprotected Ru nanocluster under different conditions."
Table 3
Fitting parameters of the Ru―Cl, Ru―O, and Ru―Ru bonds obtained from the Ru K Edge EXAFS spectra of the reaction mixture for preparing unprotected Ru nanoclusters."
Time/min | T/℃ | CN(Ru―Cl) | CN(Ru―O) | CN(Ru―Ru) | R(Ru―Cl)/Å | R(Ru―O)/Å | R(Ru―Ru)/Å |
0 | 27 | 0.56 | 6.27 | 2.40 | 2.05 | ||
2 | 48.9 | 5.65 | 2.05 | ||||
36 | 100 | 4.45 | 2.06 | ||||
39 | 100 | 3.56 | 0.21 | 2.07 | 2.68 | ||
61 | 100 | 1.57 | 2.87 | 2.12 | 2.71 | ||
62 | 100 | 3.58 | 2.71 | ||||
120 | 100 | 3.83 | 2.71 |
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