期刊
NANOSCALE
卷 11, 期 38, 页码 17579-17589出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr07060e
关键词
-
类别
资金
- CSIR, New Delhi [01/2810/14/EMR-II]
- UGC, New Delhi (BSR Mid-Career Award) [F.19-214/2018]
- DST, New Delhi [IF160290]
- Indo-US Science and Technology Forum (IUSSTF), DST, New Delhi
Nickel selenide (NiSe) nanoparticles were grown on graphene nanosheets (GN) with different mass ratios to obtain their corresponding NiSe/GN(x) (x = 0.25 to 1.00) nanohybrids by a facile in situ hydrothermal process to integrate the advantages of the high specific surface area of graphene and the homogeneously immobilized catalytic sites of NiSe. The nanohybrid with a mass ratio of 1 : 0.50 (i.e., NiSe/GN(0.50)) exhibited higher electrocatalytic activity and electrolyte diffusion. Thus, NiSe/GN(0.50) exhibited an improved photo-conversion efficiency (PCE) of 12% (eta = 8.62%) compared to a standard Pt (eta = 7.68%)-based dye-sensitized solar cell (DSSC). This improved PCE mainly originated from the catalytic ability of NiSe and the multiple interfacial electron transfer pathways of graphene, resulting in enhanced charge transfer and fast tri-iodide reduction kinetics at the counter electrode/electrolyte interface. The results obtained from the cyclic voltammetry (CV), electrochemical AC-impedance (EIS) and Tafel polarization studies validated the synergistic effects of NiSe and GN and the high potential of this nanohybrid as an efficient counter electrode (CE) for DSSCs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据