Acta Physica Sinica, Volume. 69, Issue 7, 076101-1(2020)
Fig. 1. (a) TEM image of Pt-Ni CNPs. Inset: graph of the diameter distribution of nanoparticles; (b) TEM image of a single Pt-Ni CNPs at a higher magnification; (c) HAADF-STEM images of Pt-Ni CNPs; (d) and (e) are EDS element distribution images of Pt and Ni in Pt-Ni CNPs corresponding to (c), respectively.
Fig. 2. (a) XRD patterns of Pt-Ni CNPs and standard card peaks of Pt and Ni (corresponding to red and blue respectively); (b) EDS spectrum of Pt-Ni CNPs; (c) and (d) are XPS spectra of Pt-Ni CNPs, corresponding to the 4f peak of Pt and the 2p peak of Ni, respectively.
Fig. 3. MOR performance comparison for Pt-Ni CNPs (red) and commercial Pt/C (black): (a) CV of the above catalysts for ECSAs; (b) CV of the above catalysts for MOR; (c) corresponding mass and specific activities of different catalysts for MOR; (d) LSV curves of the above electrocatalysts with a low scan rate of 5 mV/s. Inset:the potential required for fixed current density.
Fig. 4. (a) The electrode area-normalized CO stripping curves; Stability test in 0.5 M H2SO4 and 1 M CH3OH solutions: (b) Pt-Ni CNPs (red) and (c) commercial Pt/C (black) with solid line as the first cycle and dashed line as the 1000th cycle; (d) specific activities of two samples before and after 1000 cycles.
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Ke-Xin Xu, Tian-Yu Xia, Liang Zhou, Shun-Fang Li, Bin Cai, Rong-Ming Wang, Hai-Zhong Guo.
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Received: Mar. 6, 2020
Accepted: --
Published Online: Nov. 20, 2020
The Author Email: Guo Hai-Zhong (hguo@zzu.edu.cn)