Photoelectrolysis of HBr and HI Using a Monolithic Combined Photoelectrochemical∕Photovoltaic Device

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Abstract
The photoelectrolysis of and using a photoelectrochemical/photovoltaic device is demonstrated. The device is a photoelectrochemical cell, voltage‐biased with an integrated photovoltaic device. This device splits these acids directly on illumination, using light as the only energy input. Additionally, for these compounds, the device can simultaneously produce electrical energy. The and decomposition efficiency for this system, based on the short‐circuit current and the chemical potential of each compound, is 8.1 and 2.6%, respectively. The total conversion efficiency, including the cogenerated electrical energy, is 11.2 and 9.65%, respectively. ©1999 The Electrochemical Society

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