A hierarchical 2D Ni-Mo-S nanosheet@nitrogen doped graphene hybrid as a Pt-free cathode for high-performance dye sensitized solar cells and fuel cells

被引:57
作者
Balamurugan, Jayaraman [1 ]
Peera, Shaik Gouse [1 ]
Guo, Meng [1 ]
Thanh Tuan Nguyen [1 ]
Kim, Nam Hoon [1 ]
Lee, Joong Hee [1 ,2 ]
机构
[1] Chonbuk Natl Univ, Adv Mat Inst BIN Technol Plus Global BK21, Dept BIN Convergence Technol, Jeonju 561756, Jeonbuk, South Korea
[2] Chonbuk Natl Univ, Dept Polymer Nano Sci & Technol, Carbon Composite Res Ctr, Jeonju, South Korea
关键词
OXYGEN REDUCTION CATALYST; COUNTER ELECTRODES; CARBON NANOTUBES; TRANSITION-METAL; FACILE SYNTHESIS; COBALT SULFIDE; ION BATTERY; PLATINUM NANOPARTICLES; GRAPHITE NANOFIBERS; SHELL NANOPARTICLES;
D O I
10.1039/c7ta04807f
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A novel hybrid of 2D Ni-Mo-S nanosheet integrated nitrogen doped graphene (NG) is successfully developed via a simple, scalable, and cost-effective hydrothermal process, and its application towards energy conversion devices is explored. The presence of exclusive mesoporous structures combined with an excellent conducting NG network in the Ni-Mo-S/NG hybrid exhibits superior electrocatalytic activities as a counter electrode (CE) for dye-sensitized solar cells (DSSCs) and the oxygen reduction reaction (ORR) in alkaline electrolytes. SEM and TEM studies demonstrate the uniform anchoring of ultra-thin Ni-Mo-S nanosheets on NG networks. The hierarchical Ni-Mo-S/NG hybrid outperformed Ni-Mo-S, NG, and Pt when used as a CE in DSSCs and showed excellent ORR activity. The power conversion efficiency (PCE) of DSSCs with the Ni-Mo-S/NG hybrid as the CE achieved 9.89%, outperforming conventional Pt CEs (8.73%). Furthermore, Ni-Mo-S/NG showed high catalytic activity for the ORR with an onset of 0.98 V-RHE and outstanding durability compared to commercial Pt/C. The present study demonstrates the unique role of integrated Ni-Mo-S nanosheets anchored NG towards I-3(-) reduction and the ORR, and demonstrates an efficient strategy for designing highly catalytically active and cost-effective electrocatalysts for DSSC and fuel cell applications.
引用
收藏
页码:17896 / 17908
页数:13
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