Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6604832 | Electrochimica Acta | 2018 | 24 Pages |
Abstract
The efficiency of water splitting is restricted by the slow kinetics of oxygen evolution reaction (OER) for large scale hydrogen production. Designing highly efficient, low-cost and long-lasting catalysts for OER is being actively pursued. In order to improve the catalytic activity of nickel-iron hydroxide (NiFe) for OER, MoO42â as a promoter is doped into NiFe. We reported a porous amorphous MoO42--doped nickel-iron hydroxide (NiFeMo) composite on nickel foam (NF) via a facile electrodeposition method. The as-prepared NiFeMo/NF electrode displays a highly efficient catalytic activity for OER in alkaline solution and delivers a current density of 20â¯mAâ¯cmâ2 with an overpotential merely of 230â¯mV in 1.0â¯M KOH. The catalyst also exhibits extraordinary performance at high current densities and is comparable to the some Ni-based OER electrocatalysts reported to date. The high active surface areas, high surface wettability and the low charge-transfer resistance of NiFeMo/NF catalysts by a doping of MoO42â, together with effective mass transport offered by the hierarchical 3D macroporous structure, all contribute to the extraordinary synergistic OER performance.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Xiaoshan Su, Qiangqiang Sun, Jingjing Bai, Zenglin Wang, Chuan Zhao,