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Citation: JIANG Yuan-Yuan, CHEN Chuan-Xia, NI Peng-Juan, LU Yi-Zhong. Efficient Water Splitting Catalyzed by Cobalt Phosphide Nanobead-chain Like Nanoarrays Supported on Three Dimensional Nickel Foam[J]. Chinese Journal of Analytical Chemistry, ;2018, 46(4): 550-555. doi: 10.11895/j.issn.0253-3820.181009 shu

Efficient Water Splitting Catalyzed by Cobalt Phosphide Nanobead-chain Like Nanoarrays Supported on Three Dimensional Nickel Foam

School of Materials Science and Engineering, University of Jinan, Jinan 250022, China

Received Date: 5 January 2018
Revised Date: 8 February 2018

Fund Project: This work was supported by the National Natural Science Foundation of China (No.21705056) and the Natural Science Foundation of Shandong Province, China (Nos. ZR2018BB057, ZR2018PB009, ZR2017MB022).

The research for efficient and low-cost electrocatalysts for water splitting are essential for the exploitation and application of hydrogen energy. Transitional metal phosphides are considered as one of the most promising bifunctional water splitting electrocatalysts. Herein, we reported a facile two-step method (firstly hydrothermal preparation, then phosphorization under low temperature) to synthesize the bead-chain like nanoarrays of CoP supported on three dimensional Nickel foam (CoP/NF). The as-prepared CoP/NF could act as an efficient bifunctional catalyst for overall water splitting. The catalyst exhibited remarkable activity for both the oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) in alkaline media, delivering a current density of 10 mA/cm² at an overpotential of 281 mV for OER and 95 mV for HER, respectively. Efficient water splitting in alkaline system was realized by applying a two-electrode system with the CoP/NF acting as both the anode and cathode. The applied potential was 1.63 V to obtain the current density of 10 mA/cm², and good stability was also testified.
- Cobalt Phosphide,
- Bifunctional electrocatalyst,
- Hydrogen evolution reaction,
- Oxygen evolution reaction,
- Water splitting
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