Ni–Co
Codoped RuO2 with Outstanding Oxygen Evolution Reaction
Performance
Version 2 2019-06-07, 18:52Version 2 2019-06-07, 18:52
Version 1 2019-06-07, 18:48Version 1 2019-06-07, 18:48
Posted on 2019-06-07 - 18:52
Synthesizing oxygen
evolution reaction (OER) catalysts with high activity by codoping
has been proven to be feasible for effectively using noble metals
via renewing their basic properties. Here, we prepare two series of
Ru based codoped catalysts NixCoyRu1–x–yO2 with outstanding OER activity compared
with RuO2, one of the state-of-the-art OER catalysts. The
molar ratio of case dopants, nickel and cobalt, is regulated from
1:1 to 1:1.5 for the host structure RuO2 as the main variable.
The synthesized codoped RuO2 with Co/Ni of 1.5 reflected
a Tafel slope of only 32 mV dec–1, which is appreciably
lower than the 64 mV dec–1 for pure RuO2. The performed X-ray photoelectron spectroscopy (XPS) indicated
that the key factor of OER activity for codoped catalysts with different
dopant ratio is the oxygen vacancy.
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