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We have investigated heat-treated 4H- and 6H-SiC(0001)Si surfaces using AES, LEED, EELS and STM in ultra high vacuum (UHV). √3 √3 and 6 6 reconstructions were observed in the STM study at ∼ 1000 and ∼ 1200°C, respectively. On the other hand, 6√3 6√3 superstructure was observed by LEED at ∼ 1200°C. The AES p-p height ratio of Si (LVV)/C (KLL) decreased at higher temperatures. EELS proved the...
CO 2 and CO were electrochemically reduced with Cu(100), Cu(110) and Cu(111) electrodes at a constant current density of 5 mA cm −2 in 0.1M KHCO 3 at ambient temperature. C 2 H 4 is favorably produced on Cu(100), and CH 4 is predominantly yielded on Cu(111). Cu(110) showed an intermediate product selectivity. Voltammetric measurements in the presence...
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