C611PracticeExam32010

C611PracticeExam32010 - CHEMISTRY C611: ELECTROANALYTICAL...

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C611: ELECTROANALYTICAL CHEMISTRY Practice Examination 3 Fall, 2010 1. (15 points) A number of in situ and ex situ techniques have been developed for the study of electrode–solution interfaces. Choose any five of the following techniques. For each technique selected, describe (i) what specific knowledge or information can be obtained, (ii) how the technique provides the information, and (iii) whether the technique is an in situ or ex situ one. (a) low-energy electron diffraction (LEED) (b) X-ray photoelectron spectroscopy (XPS) (c) ellipsometry (d) Auger electron spectroscopy (AES) (e) electron spin resonance (ESR) or electron paramagentic resonance (EPR) spectrometry (f) surface-enhanced Raman spectroscopy (SERS) (g) transmission ultraviolet–visible spectroelectrochemistry (h) scanning tunneling microscopy (STM) (i) electrochemical quartz crystal microbalance (EQCM) (j) Fourier transform infrared spectroscopy (FTIR) 2. (12 points) Consider the technique of controlled-potential (bulk) electrolysis. (a) What are the key advantages and disadvantages of divided and undivided cells for bulk electrolysis? (b) What procedure would you use to remove dissolved oxygen from a solution that is to be electrolyzed? (c) How do you select the proper potential for a controlled-potential electrolysis? (d) How can you determine when a controlled-potential electrolysis can be terminated? 3. (15 points) Explain or define (using appropriate diagrams if desired) each of the following terms associated with photoelectrochemistry and semiconductor electrodes. (a)
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C611PracticeExam32010 - CHEMISTRY C611: ELECTROANALYTICAL...

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