1. Molybdenum Nitride Electrocatalysts for Hydrogen Evolution More Efficient than Platinum/Carbon: Mo2N/CeO2@Nickel Foam
- Author
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Xizhuang Liang, Ying Dai, Peng Zhou, Xingshuai Lv, Cong Wang, Myung-Hwan Whangbo, Zeyan Wang, Yingjie Li, Peng Wang, Yuanyuan Liu, Zhaoke Zheng, and Baibiao Huang
- Subjects
Materials science ,Hydrogen ,Electrolysis of water ,chemistry.chemical_element ,02 engineering and technology ,Overpotential ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Catalysis ,Nickel ,chemistry ,Chemical engineering ,Water splitting ,General Materials Science ,0210 nano-technology ,Platinum - Abstract
To produce hydrogen economically by electrolysis of water, one needs to develop a non-precious-metal catalyst that is as efficient as platinum metal. Here, we prepare such a catalyst by growing a layer of Mo2N over a layer of CeO2 deposited on nickel foam (NF) [hereafter, Mo2N /CeO2@NF] and show that the activity of this self-supported catalyst for hydrogen evolution in 1.0 M KOH is more efficient than that of the Pt/C electrode, achieving a current density of 10 mA/cm2 at a fairly low overpotential of 26 mV. Furthermore, after a long-time electrochemical stability test for 24 h at a fixed current density, the overpotential needed to attain a current density of 10 mA/cm2 is increased only by 6 mV, implying the huge potential of this method to prepare a super HER activity electrode for water splitting.
- Published
- 2020