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- W2097859098 abstract "The role of the electronic properties of a semiconductor in heterogeneous catalysis and electrochemistry was experimentally investigated on single‐crystal ZnO. It was shown quantitatively that the availability of electrons and holes at the surface is dominant in the mechanism of a heterogeneously catalyzed reaction. Chemical rate measurements as well as in situ solid‐state measurements were carried out in an aqueous medium for the reaction: HCOOH+O2→H2O2+CO2, photocatalyzed by ZnO. Two new experimental electrochemical methods for semiconductor surface reactions were developed: ``current doubling'' and measurement of ``unfilled'' electronic surface states by the capacitance. They were devised to characterize reactive sorbed species. The detailed catalytic mechanism was based on studies of individual reaction steps under three solid‐state surface conditions: (1) only holes reacting, (2) only electrons reacting, and (3) both holes and electrons reacting. The first two correspond to the ZnO being an electroch..." @default.
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- W2097859098 date "1967-08-15" @default.
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- W2097859098 title "Chemical Role of Holes and Electrons in ZnO Photocatalysis" @default.
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- W2097859098 doi "https://doi.org/10.1063/1.1712115" @default.
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