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by Yan Feng, Hui Liu, and Jun Yang

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1 by Yan Feng, Hui Liu, and Jun Yang
A selective electrocatalyst–based direct methanol fuel cell operated at high concentrations of methanol by Yan Feng, Hui Liu, and Jun Yang Science Volume 3(6):e June 30, 2017 Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

2 Fig. 1 DMFC assemblies. DMFC assemblies. Schematic showing the DMFC fabricated with selective electrocatalysts at the anode and cathode chamber. Inset: Photograph of a practical cell. Yan Feng et al. Sci Adv 2017;3:e Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

3 Fig. 2 Core-shell-shell Au@Ag2S@Pt nanocomposites.
Core-shell-shell nanocomposites. Transmission electron microscopy (TEM) image (A), aberration-corrected high-angle dark-field scanning TEM (STEM) image (B), nanoscale element mappings (C to H), and elemental profiles in STEM mode (I) of core-shell-shell nanocomposites prepared in oleylamine at elevated temperatures. a.u., arbitrary units. Yan Feng et al. Sci Adv 2017;3:e Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

4 Fig. 3 Core-shell Au@Pd nanoparticles.
Core-shell nanoparticles. TEM image (A), aberration-corrected high-angle dark-field STEM image (B), nanoscale element mappings (C to F), and elemental profiles in STEM mode (G) of core-shell nanoparticles prepared in oleylamine using an Au-catalyzed strategy. Yan Feng et al. Sci Adv 2017;3:e Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

5 Fig. 4 Performance of the assembled DMFC with selective or commercial catalysts.
Performance of the assembled DMFC with selective or commercial catalysts. Polarization (A and C) and power density curves (B and D) of the assembled DMFC at different methanol feed concentrations with selective catalysts (A and B) and commercial Pt/C catalysts (C and D); comparison of the assembled DMFC with selective and commercial Pt/C catalysts in terms of open circuit cell voltage (E) and power density (F). Yan Feng et al. Sci Adv 2017;3:e Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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