Статья

Ruthenium core-activated platinum monolayer shell high redox activity cathodic electrocatalysts for dye-sensitized solar cells

Tsan‐Yao ChenDepartment of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, TaiwanYu‐Ting LiuDepartment of Environmental Science and Engineering, Tunghai University, Taichung 40704, TaiwanHa M. NguyenDepartment of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, TaiwanLiang-Jen FanNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanChiun-Yi WuDepartment of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, TaiwanTzy-Jiun Mark LuoDepartment of Materials Science and Engineering, North Carolina State University, Raleigh, NC 27695, USAChih-Hao LeeDepartment of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, TaiwanYaw‐Wen YangNational Synchrotron Radiation Research Center, Hsinchu 30076, TaiwanTen-Chin WenDepartment of Chemical Engineering, National Cheng Kung University, Tainan 70101, TaiwanTsang-Lang LinDepartment of Engineering and System Science, National Tsing Hua University, Hsinchu 30013, Taiwan

2013en

ABI

Аннотация

Here, we have combined the understanding of density functional theory in relation with lattice strain-to-activity correlation to design a Rucore–Ptshell structured electrocatalyst in a dye-sensitized solar cell (DSC) cathode. This electrocatalyst possesses a compressive lattice strain in the shell region which translocates the Pt valence charge to neighboring atoms to decrease the Pt valence band density of states and thus lower the Pt d-band levels. Consequently, compared with DSCs using Pt nanoparticles (NPs) cathode, the Rucore–Ptshell NPs improves the triiodide to iodide redox reduction activity by 2.11-fold and thus boosts the photovoltaic efficiency of DSCs by ∼30.4%. These results provide mechanistic information for the development of DSCs with reduced Pt utilization and programmable electrochemical performance.

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Идентификаторы

DOI: 10.1039/c3ta01547e

Цитирования и источники

Цитирований: 3Использованных источников: 0

Показатели — AkademScholar