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Energy band diagrams of Pd and MoS2 before and upon H2 exposure. Lower work function of MoS2 in comparison to Pd results in electron transfer to Pd before H2 exposure. Upon H2 exposure, lower work function of PdHx in comparison to MoS2 results in electron transfer to MoS2 and hence, compensation of charge carriers is observed in MoS2. Reprinted with permission from [72]. Copyright 2017 Sensors and Actuators B: Chemical.
