Metal-Organic Frameworks Derived Nanotube of Nickel–Cobalt Bimetal Phosphides as Highly Efficient Electrocatalysts for Overall Water Splitting
作者：Liting Yan, Lei Cao, Pengcheng Dai, Xin Gu, Dandan Liu, Liangjun Li, Ying Wang, and Xuebo Zhao*
關(guān)鍵字：MOF, Nanotube, Electrocatalyst,Overall water splitting
論文來源：期刊
具體來源：Adv. Funct. Mater. 2017, 27, 1703455
發(fā)表時(shí)間：2017年
The design of highly efficient, stable, and noble-metal-free bifunctional
electrocatalysts for overall water splitting is critical but challenging. Herein, a
facile and controllable synthesis strategy for nickel–cobalt bimetal phosphide
nanotubes as highly efficient electrocatalysts for overall water splitting via
low-temperature phosphorization from a bimetallic metal-organic framework
(MOF-74) precursor is reported. By optimizing the molar ratio of Co/Ni atoms
in MOF-74, a series of CoxNiyP catalysts are synthesized, and the obtained
Co4Ni1P has a rare form of nanotubes that possess similar morphology
to the MOF precursor and exhibit perfect dispersal of the active sites. The
nanotubes show remarkable hydrogen evolution reaction (HER) and oxygen
evolution reaction (OER) catalytic performance in an alkaline electrolyte,
affording a current density of 10 mA cm?2 at overpotentials of 129 mV for
HER and 245 mV for OER, respectively. An electrolyzer with Co4Ni1P nanotubes
as both the cathode and anode catalyst in alkaline solutions achieves a
current density of 10 mA cm?2 at a voltage of 1.59 V, which is comparable to
the integrated Pt/C and RuO2 counterparts and ranks among the best of the
metal-phosphide electrocatalysts reported to date.