TY - JOUR
T1 - Spin pinning effect to reconstructed oxyhydroxide layer on ferromagnetic oxides for enhanced water oxidation
AU - Wu, Tianze
AU - Ren, Xiao
AU - Sun, Yuanmiao
AU - Sun, Shengnan
AU - Xian, Guoyu
AU - Scherer, Günther G.
AU - Fisher, Adrian C.
AU - Mandler, Daniel
AU - Ager, Joel W.
AU - Grimaud, Alexis
AU - Wang, Junling
AU - Shen, Chengmin
AU - Yang, Haitao
AU - Gracia, Jose
AU - Gao, Hong-Jun
AU - Xu, Zhichuan J.
PY - 2021/12/1
Y1 - 2021/12/1
N2 - Producing hydrogen by water electrolysis suffers from the kinetic barriers in the oxygen evolution reaction (OER) that limits the overall efficiency. With spin-dependent kinetics in OER, to manipulate the spin ordering of ferromagnetic OER catalysts (e.g., by magnetization) can reduce the kinetic barrier. However, most active OER catalysts are not ferromagnetic, which makes the spin manipulation challenging. In this work, we report a strategy with spin pinning effect to make the spins in paramagnetic oxyhydroxides more aligned for higher intrinsic OER activity. The spin pinning effect is established in oxideFM/oxyhydroxide interface which is realized by a controlled surface reconstruction of ferromagnetic oxides. Under spin pinning, simple magnetization further increases the spin alignment and thus the OER activity, which validates the spin effect in rate-limiting OER step. The spin polarization in OER highly relies on oxyl radicals (O∙) created by 1st dehydrogenation to reduce the barrier for subsequent O-O coupling. © 2021, The Author(s).
AB - Producing hydrogen by water electrolysis suffers from the kinetic barriers in the oxygen evolution reaction (OER) that limits the overall efficiency. With spin-dependent kinetics in OER, to manipulate the spin ordering of ferromagnetic OER catalysts (e.g., by magnetization) can reduce the kinetic barrier. However, most active OER catalysts are not ferromagnetic, which makes the spin manipulation challenging. In this work, we report a strategy with spin pinning effect to make the spins in paramagnetic oxyhydroxides more aligned for higher intrinsic OER activity. The spin pinning effect is established in oxideFM/oxyhydroxide interface which is realized by a controlled surface reconstruction of ferromagnetic oxides. Under spin pinning, simple magnetization further increases the spin alignment and thus the OER activity, which validates the spin effect in rate-limiting OER step. The spin polarization in OER highly relies on oxyl radicals (O∙) created by 1st dehydrogenation to reduce the barrier for subsequent O-O coupling. © 2021, The Author(s).
UR - http://www.scopus.com/inward/record.url?scp=85108076238&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85108076238&origin=recordpage
U2 - 10.1038/s41467-021-23896-1
DO - 10.1038/s41467-021-23896-1
M3 - RGC 21 - Publication in refereed journal
C2 - 34131143
SN - 2041-1723
VL - 12
JO - Nature Communications
JF - Nature Communications
M1 - 3634
ER -