Chinese Journal of Catalysis ›› 2022, Vol. 43 ›› Issue (1): 110-115.DOI: 10.1016/S1872-2067(21)63921-9
• Communications • Previous Articles Next Articles
Wenxiu Yanga,b,†, Weiyu Zhanga,†, Rui Liub, Fan Lva, Yuguang Chaoa, Zichen Wanga, Shaojun Guoa,*()
Received:
2021-06-03
Accepted:
2021-07-08
Online:
2022-01-18
Published:
2021-11-15
Contact:
Shaojun Guo
About author:
* E-mail: guosj@pku.edu.cn† Contributed equally to this work.
Supported by:
Wenxiu Yang, Weiyu Zhang, Rui Liu, Fan Lv, Yuguang Chao, Zichen Wang, Shaojun Guo. Amorphous Ru nanoclusters onto Co-doped 1D carbon nanocages enables efficient hydrogen evolution catalysis[J]. Chinese Journal of Catalysis, 2022, 43(1): 110-115.
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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(21)63921-9
Fig. 1. Characterization of the a-Ru@Co-DHC material. XRD (a), SEM (b), TEM (c,d) images of a-Ru@Co-DHC. The inset of Fig. 1(d) is the SAED pattern of a-Ru@Co-DHC. HRTEM (e) and HAADF-STEM (f) images of a-Ru@Co-DHC; (g) HAADF-STEM images and the corresponding EDS mapping of a-Ru@Co-DHC (C green, O purple, N blue, Co yellow, and Ru orange).
Fig. 2. Compositional and structural information of the a-Ru@Co-DHC material. (a) XPS spectrum; (b) high-resolution C 1s and Ru 3d; (c) high-resolution N 1s; (d) Raman; (e) nitrogen adsorption-desorption isotherms; (f) its pore distribution.
Fig. 3. Ru K-edge XANES spectra (a) and the K3-weighted FT-EXAFS spectra (b) of Ru foil, RuO2 and a-Ru@Co-DHC. Co K-edge XANES spectra (c) and the K3-weighted FT-EXAFS (d) of Co foil, CoPc and a-Ru@Co-DHC.
Fig. 4. Electrocatalytic activities of different materials in 1.0 M KOH solution. HER polarization curves (a), corresponding Tafel plots (b), overpotentials at a current density of 10 mA cm-2 (c), and mass activities (d) for the a-Ru@DHC, a-Ru@Co-DHC, commercial Ru/C and commercial Pt/C catalysts; (e) Polarization curves of a-Ru@Co-DHC recorded before and after 5000 cycles; (f) Chronopotentiometry measurements of the a-Ru@Co-DHC catalyst at current density of 10 mA cm-2; (g) Comparison of HER catalytic performance for a-Ru@Co-DHC with other reported Ru-based catalysts in alkaline media (1.0 M KOH) [39-47].
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