Two dimensional layered nanomaterials molybdenum disulfide and tungsten disulfide are attractive hydrogen evolution catalysts for water splitting. During water splitting, various reactive oxygen species (ROS) including hydrogen peroxide may be generated, which could degrade the performance of the catalysts. In this work, the ROS scavenging ability of few-layered nanosheets molybdenum disulfide and tungsten disulfide has been evaluated by using a sensitive, DNA-encased single-walled carbon nanotube (SWNT)-based near infrared optical sensing method. By measuring the magnitude of spectral recovery of the hydrogen peroxide-suppressed SWNTs when MoS2 or WS2 suspended in sodium dodecyl sulfate aqueous solution are added, the ROS scavenging abilities of MoS2 and WS2 have been determined, with reference to an antioxidant Trolox standard. The detail of the ROS scavenging behaviors of these water splitting catalysts will be discussed in this work.

Assessment of ROS scavenging ability of water splitting catalysts molybdenum disulfide and tungsten disulfide

251st National Meeting (2016)

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