期刊
ENERGY & ENVIRONMENTAL SCIENCE
卷 9, 期 2, 页码 478-483出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ee03440j
关键词
-
资金
- ERC Grant 2DMATER
- CFAED
- EC under the Graphene Flagship [CNECTICT-604391]
Developing cost-effective electrocatalysts for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in basicmedia is critical to renewable energy conversion technologies. Here, we report a ternary hybrid that is constructed by in situ growth of cobalt selenide (Co0.85Se) nanosheets vertically oriented on electrochemically exfoliated graphene foil, with subsequent deposition of NiFe layered-double-hydroxide by a hydrothermal treatment. The resulting 3D hierarchical hybrid, possessing a high surface area of 156 m(2) g(-1) and strong coupling effect, exhibits excellent catalytic activity for OER, which only requires overpotentials of 1.50 and 1.51 V to attain current densities of 150 and 250 mA cm(-2), respectively. These overpotentials are much lower than those reported for other non-noble-metal materials and Ir/C catalysts. The hybrid also efficiently catalyzes HER in base with a current density of 10 mA cm(-2) at an overpotential of -0.26 V. Most importantly, we achieve a current density of 20 mA cm(-2) at 1.71 V by using the 3D hybrid as both a cathode and an anode for overall water splitting, which is well comparable to the integrated performance of Pt/C and Ir/C catalysts.
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