fig1

Figure 1. Digital photographs of PtCu and PtCu(CS) aerogel formation at different stages (A) before and (B) 5 min, (C) 10 min, (D) 20 min, (E) 30 min, (F) 40 min, (G) 50 min, (H) 1 h and (I) 5 h after the addition of NaBH₄.