TY - JOUR
T1 - Ce-doping induced structure evolution in FeNi-based (oxy)hydroxide for highly efficient oxygen evolution reaction
AU - Liu, Zhonghu
AU - Hu, Junhui
AU - Li, Shuo
AU - Lu, Cheng
AU - Feng, Kun
AU - Wang, Shifeng
AU - Zhong, Jun
PY - 2023/9/15
Y1 - 2023/9/15
N2 - Structure evolution of the catalyst typically plays a key role in determining the catalytic activity in harsh reaction environment. Here we report a doping-reconstruction strategy to prepare catalyst for highly efficient oxygen evolution reaction (OER). Ce-doping has been induced in FeNi metal-organic frameworks (MOFs) to change the microstructure, which can further lead to the in-situ formation of active (oxy)hydroxides. As a result, the obtained Ce-FeNiOOH shows a low overpotential of 196 mV at 10 mA cm−2, with a small Tafel slope of 33.5 mV dec−1 and a good stability for 100 h. Moreover, by coupling with Pt/C, the two-electrode cell can achieve an excellent performance for overall water splitting with a low voltage of 1.44 V at 10 mA cm−2 (1.59 V at 100 mA cm−2). Synchrotron radiation spectroscopy reveals that Fe-O-Ce microstructure has been created with Ce-doping, which plays a key role for the further transition from MOFs to (oxy)hydroxide during OER.
AB - Structure evolution of the catalyst typically plays a key role in determining the catalytic activity in harsh reaction environment. Here we report a doping-reconstruction strategy to prepare catalyst for highly efficient oxygen evolution reaction (OER). Ce-doping has been induced in FeNi metal-organic frameworks (MOFs) to change the microstructure, which can further lead to the in-situ formation of active (oxy)hydroxides. As a result, the obtained Ce-FeNiOOH shows a low overpotential of 196 mV at 10 mA cm−2, with a small Tafel slope of 33.5 mV dec−1 and a good stability for 100 h. Moreover, by coupling with Pt/C, the two-electrode cell can achieve an excellent performance for overall water splitting with a low voltage of 1.44 V at 10 mA cm−2 (1.59 V at 100 mA cm−2). Synchrotron radiation spectroscopy reveals that Fe-O-Ce microstructure has been created with Ce-doping, which plays a key role for the further transition from MOFs to (oxy)hydroxide during OER.
KW - Ce-doping
KW - Microstructure
KW - Oxygen evolution reaction
KW - Reconstruction
KW - X-ray absorption spectroscopy
UR - http://www.scopus.com/inward/record.url?scp=85162250498&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2023.157590
DO - 10.1016/j.apsusc.2023.157590
M3 - Article
AN - SCOPUS:85162250498
SN - 0169-4332
VL - 631
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 157590
ER -