fig5
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Figure 5. Optimized structures of (A) ZnO, (B) Mg-ZnO and (C) ZnO/Mg-ZnO and DOS of (D) ZnO, (E) Mg-ZnO and (F) ZnO/Mg-ZnO. (G) Durability of constructed fuel cell device and (H) cross-sectional view of NCAL/ZnO/Mg-ZnO/NCAL after durability operation.