Se-Doping Activates FeOOH for Cost-Effective and Efficient Electrochemical Water Oxidation
Shuai Niu, Wen-Jie Jiang, Zengxi Wei, Tang Tang, Jianmin Ma, Jin-Song Hu, Li-Jun Wan
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | AMER CHEMICAL SOC | Published : 2019
Ni or Co is commonly required in efficient electrocatalysts for oxygen evolution reaction (OER). Although Fe is much more abundant and cheaper, full-Fe or Fe-rich catalysts suffer from insufficient activity. Herein, we discover that Se-doping can drastically promote OER on FeOOH and develop a facile on-site electrochemical activation strategy for achieving such a Se-doped FeOOH electrode via an FeSe precatalyst. Theoretical analysis and systematic experiments prove that Se-doping enables FeOOH as an efficient and low-cost OER electrocatalyst. By optimizing the electrode structure, an industrial-level OER current output of 500 mA cm-2 is secured at a low overpotential of 348 mV. The applicati..View full abstract
Awarded by National Key Project on Basic Research
Awarded by National Natural Science Foundation of China
Awarded by National Postdoctoral Program for Innovative Talents
We acknowledge the financial support from the National Key Project on Basic Research (2015CB932302), the National Natural Science Foundation of China (91645123 and 21773263), and the National Postdoctoral Program for Innovative Talents (BX2001700250). We thank Dr. Fen Liu, Dr. Zhijuan Zhao, and Xiaoyu Zhang for their help in XPS analysis, Yang Sun for XRD analysis, and Dr. Bo Guan and Ji-Ling Yue for SEM.