The surface characteristics and electrochemical behaviors of Tb 4O 7 layers deposited on graphite by thermal decomposition were investigated by means of XPS and cyclic voltammetry at 700 ℃ in NaCl KCl melts. XPS a...The surface characteristics and electrochemical behaviors of Tb 4O 7 layers deposited on graphite by thermal decomposition were investigated by means of XPS and cyclic voltammetry at 700 ℃ in NaCl KCl melts. XPS analysis indicates that thermal decomposition products are mainly non stoichiometric and defective structurally oxide. Cyclic polarization on oxide electrode reflects the specific adsorption of Cl - and structural modification of oxide surface. Analysis based on the features of the voltammograms reveals the redox behaviors of Tb oxide layer with different valency states and its correlation to electrocatalytic active. The variation of voltammetric charge was used to characterize the affection of temperature, measure the electrochemical active surface area and monitor the modification of active surface.展开更多
文摘The surface characteristics and electrochemical behaviors of Tb 4O 7 layers deposited on graphite by thermal decomposition were investigated by means of XPS and cyclic voltammetry at 700 ℃ in NaCl KCl melts. XPS analysis indicates that thermal decomposition products are mainly non stoichiometric and defective structurally oxide. Cyclic polarization on oxide electrode reflects the specific adsorption of Cl - and structural modification of oxide surface. Analysis based on the features of the voltammograms reveals the redox behaviors of Tb oxide layer with different valency states and its correlation to electrocatalytic active. The variation of voltammetric charge was used to characterize the affection of temperature, measure the electrochemical active surface area and monitor the modification of active surface.
