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photoelectrocatalytic (pec) decomposition of water to produce solar fuels such as hydrogen or chemicals is considered one of the most promising strategies for sustainable energy use. the photogenerated holes and electrons of the photoelectrode go to the surface of the photoanode and photocathode respectively with the assistance of photogenerated voltage or applied bias voltage, and participate in the redox reaction of water.
the nature of photoelectric testing is a kind of electrocatalytic testing under the aid of light. the basic principles and methods in electrochemistry are mostly applicable in pec. the photoelectric test device is generally divided into three parts: light source, reaction system (three-electrode reactor vacuum line), and test system (electrochemical workstation chromatography) (figure 1).
the photocatalytic experimental device has the same place as the photocatalytic experimental device, but it is not the same. polfele draws on the existing equipment in the top laboratory and combines its years of experience in photocatalysis to develop the pec 1000 photocatalytic test device (figure 2) it has greatly improved the automation and accuracy, and can meet the needs of researchers in photocatalysis.
at present, the light source used in most photocatalysis laboratories is the same 300w series xenon light source as the photocatalysis experiment. strictly speaking, this is not the best choice. the 300w series xenon lamp light source has a spectrum similar to sunlight and a high light intensity. it is very suitable for photocatalytic experiments, but its uniformity is worse and the light spot is very large. a large amount of light energy loss, which also has a negative effect on the reference electrode, is not suitable for photocatalytic experiments. in response to this situation, pofelet has developed the fx300 fiber optic light source dedicated to photocatalysis, which is characterized by good uniformity. similar to a solar simulator, the light spot can be adjusted according to the size of the electrode to prevent light from shining onto the reference electrode. in addition, the pec1000 is equipped with a chopper to obtain the illumination of the cycle opening and closing, and the cycle is adjustable (figure 3).
the pec1000 is equipped with a chopper to obtain the illumination of the cycle opening and closing, and the cycle is adjustable (figure 3).
the pec1000 is equipped with a chopper to obtain the illumination of the cycle opening and closing, and the cycle is adjustable (figure 3).
the pec1000 is equipped with a chopper to obtain the illumination of the cycle opening and closing, and the cycle is adjustable (figure 3).
