TY - JOUR
T1 - Interface engineered NiFe2O4−x/NiMoO4 nanowire arrays for electrochemical oxygen evolution
AU - Choi, Juhyung
AU - Kim, Daekyu
AU - Zheng, Weiran
AU - Yan, Bingyi
AU - Li, Yong
AU - Lee, Lawrence Yoon Suk
AU - Piao, Yuanzhe
N1 - Funding Information:
J. C. and D. K. contributed equally to this work. This work was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT and Future Planning, Republic of Korea , as Global Frontier Project ( CISS-2012M3A6A6054186 ), Basic Science Research Program through National Research Foundation of Korea ( NRF-2018R1D1A1B07051249 ), Nano Materials Technology Development Program ( NRF-2015M3A7B6027970 ) funded by the Ministry of Education . The financial supports from the Innovation and Technology Commission of Hong Kong and Hong Kong Polytechnic University ( 1-BE0Y ) are also acknowledged.
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/6/5
Y1 - 2021/6/5
N2 - Designing highly active and stable electrocatalysts for oxygen evolution reaction (OER) is the key to success in sustainable water splitting reaction, a sustainable route towards high purity hydrogen production. Interface engineering is one of the most effective strategies for modulating the local electronic structure of active sites to enhance catalytic activity. Herein, NiFe2O4−x nanoparticles were integrated to NiMoO4 nanowires (NiFe2O4−x/NMO) grown on nickel foam to construct an extended interface with strong electronic interactions. The NiFe2O4−x/NMO demonstrates high OER activities as manifested by a low overpotential of 326 mV at a high current density of 600 mA cm−2 and good long-term stability. The intimate interface between NiFe2O4−x and NiMoO4 is responsible for the Fe-facilitated phase transition to active γ-NiOOH phase as revealed by in situ Raman spectroelectrochemical studies. This study outlines how the interface design of integrated nanostructures can optimize the formation of active phase for enhanced catalytic activity.
AB - Designing highly active and stable electrocatalysts for oxygen evolution reaction (OER) is the key to success in sustainable water splitting reaction, a sustainable route towards high purity hydrogen production. Interface engineering is one of the most effective strategies for modulating the local electronic structure of active sites to enhance catalytic activity. Herein, NiFe2O4−x nanoparticles were integrated to NiMoO4 nanowires (NiFe2O4−x/NMO) grown on nickel foam to construct an extended interface with strong electronic interactions. The NiFe2O4−x/NMO demonstrates high OER activities as manifested by a low overpotential of 326 mV at a high current density of 600 mA cm−2 and good long-term stability. The intimate interface between NiFe2O4−x and NiMoO4 is responsible for the Fe-facilitated phase transition to active γ-NiOOH phase as revealed by in situ Raman spectroelectrochemical studies. This study outlines how the interface design of integrated nanostructures can optimize the formation of active phase for enhanced catalytic activity.
KW - Active surface phase
KW - Electrocatalysis
KW - Interface engineering
KW - Oxygen evolution reaction
KW - Prussian blue analog
UR - http://www.scopus.com/inward/record.url?scp=85099197104&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2020.119857
DO - 10.1016/j.apcatb.2020.119857
M3 - Journal article
AN - SCOPUS:85099197104
SN - 0926-3373
VL - 286
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
M1 - 119857
ER -
