The Electrochemical Development of Pt(111) Stepped Surfaces and Its Influence on Methanol Electrooxidation

Figure 1

Cyclic voltammetry in 1 M sulphuric acid between 0.05 V and 1.50 V run at 0.10 Vs⁻¹ for (a) Pt pc annealing ℎ₂/ℎ₁=0.84; (b) Pt F(111) after a RSWPS 𝐄_𝐝=0.70 V, 𝐄_𝐮=1.40 V, 𝑓=2.5 kHz, 𝑡=10 minutes, ℎ₂/ℎ₁=0.52; (c) Pt F(100) after an RSWPS 𝐄_𝐝=0.00 V, 𝐄_𝐮=1.50 V, 𝑓=5.0 kHz, 𝑡=10 minutes, ℎ₂/ℎ₁=1.80; (d) CT Pt after 𝐄=−2 V, 𝑡=30 minutes. ℎ₂/ℎ₁=0.75.

(a)

(b)

(c)

(d)