• 文献标题:   PtCu thickness-modulated interfacial charge transfer and surface reactivity in stacked graphene/Pd@PtCu heterostructures for highly efficient visible-light reduction of CO2 to CH4
  • 文献类型:   Article
  • 作  者:   XI YM, ZHANG Y, CAI XT, FAN ZX, WANG KF, DONG WR, SHEN Y, ZHONG SX, YANG L, BAI S
  • 作者关键词:   stacking design, interfacial charge polarization, photocatalysi, co2 reduction, surface interfacial engineering
  • 出版物名称:   APPLIED CATALYSIS BENVIRONMENTAL
  • ISSN:   0926-3373 EI 1873-3883
  • 通讯作者地址:  
  • 被引频次:   20
  • DOI:   10.1016/j.apcatb.2022.121069 EA JAN 2022
  • 出版年:   2022

▎ 摘  要

Photocatalytic conversion of CO2 to chemical feedstocks represents an intriguing approach to address the energy and environmental crisis, but faces low conversion efficiencies resulted from unsatisfied light absorption, charge recombination and surface reactivity of traditional semiconductor photocatalysts. Herein, we report stacked graphene/Pd@PtCu nanostructures with atomically thin PtCu shell to overcome above challenges and realize high-efficient CO2-to-CH4 photoreduction. The smart design begins with the excitation of Ru complex with broad visible absorption, which is followed by the smooth movement of photoelectrons via the graphene & RARR;Pd & RARR;PtCu pathway, and then the highly selective CO2 reduction on the PtCu surface. As the PtCu thickness decreases, the strengthened Pd-PtCu interfacial charge polarization contributes to improved charge separation/migration. Meanwhile, CO2 adsorption on the PtCu surface is ameliorated owing to increased electron accumulation and compressive strain. This work provides a new design for boosting the photocatalytic performance by cooperative surface and interfacial modulations.