Highly correlation of CO2 reduction selectivity and surface electron Accumulation: A case study of Au-MoS2 and Ag-MoS2 catalyst

Songmei Sun*, Qi An, Motonori Watanabe, Junfang Cheng, Hack Ho Kim, Taner Akbay, Atsushi Takagaki, Tatsumi Ishihara

*この研究の対応する著者

研究成果: Article査読

29 被引用数 (Scopus)

抄録

Artificial photosynthesis from CO2 reduction to methane is severely hampered by the kinetically challenging eight-electron transfer process. Accumulated electrons has been demonstrated can decrease this kinetic barrier. However, charge accumulation were mainly reported in several homogenous systems because of its difficulties in heterogenous systems. Here we identify that highly accumulated electrons exist in Au loaded ultrathin MoS2 under light irradiation, resulting in a superior performance of CO2 reduction to methane. The selectivity for methane is up to 80 % with an average production rate of about 19.38 μmolg−1 h−1 in pure water. Further detailed studies reveal that plasmon-excited hot electrons transfer from Au to charged excitons in ultrathin MoS2 promotes electron accumulation and multi-electron CO2 reduction kinetics for methane generation. This is further supported by the CO2 reduction performance of Ag-MoS2. Along with the vanished accumulated electrons, CO is the main product with a selectivity of 98 %.

本文言語English
論文番号118931
ジャーナルApplied Catalysis B: Environmental
271
DOI
出版ステータスPublished - 2020 8月 15
外部発表はい

ASJC Scopus subject areas

  • 触媒
  • 環境科学(全般)
  • プロセス化学およびプロセス工学

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