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Near-Monolayer Platinum Shell on Core–Shell Nanocatalysts for High-Performance Direct Methanol Fuel Cell

Jang-Jung WangNational Tsing Hua UniversityYuting LiuDepartment of Environmental Science and Engineering, Tunghai University, No. 181, Section 3, Taichung Port Road, Taichung 40704, TaiwanI‐Li ChenNational Tsing Hua UniversityYaw‐Wen YangNational Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, TaiwanTsung‐Kuang YehNational Tsing Hua UniversityChih-Hao LeeNational Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu 30076, TaiwanChi‐Chang HuNational Tsing Hua UniversityTen‐Chin WenDepartment of Chemical Engineering, National Cheng Kung University, 1 University Road, Tainan 70101, TaiwanTsan‐Yao ChenNational Tsing Hua UniversityTsang‐Lang LinNational Tsing Hua University

2014en

ABI

Annotatsiya

We investigate the Rucore-Ptshell nanoparticles (NPs) with near-monolayer thick shell atoms as the electrocatalysts at anode in the direct methanol fuel cell (DMFC). The results of X-ray diffraction indicate that its crystal structure experienced a compressive strain in Pt shell region. The shell thickness of Rucore-Ptshell NPs was determined to be 1.5 atomic layers by small-angle X-ray scattering by using a core–shell scattering model, and the surface atomic morphology was illustrated via high-resolution transmission electron microscopy (HRTEM). Compared with the Pt NPs, the power density of DMFC with Rucore-Ptshell NPs was improved by ∼450% (from 17.1 to 92.8 mW cm–2 mg–1), and the open-circuit voltage was improved by 0.18 V (from 0.49 to 0.67 V). Our results fulfill the development of cost-effective DMFC with outstanding performance.

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Identifikatorlar

DOI: 10.1021/jp408012d

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