Cobalt-Boride Nanostructured Thin Films with High
Performance and Stability for Alkaline Water Oxidation
Posted on 2019-09-26 - 01:29
Nanocrystalline cobalt
boride (Co-B) thin films prepared by pulsed
laser deposition were used as an anode catalyst to study the water
oxidation reaction in alkaline medium. Elemental depth profiling revealed
the bulk of the film to be metallic, which helps in improving conduction
of charges, while the surface of the film was rich in CoOOH-type species
to facilitate the oxygen evolution reaction (OER). Comparison of OER
performance with boron-free samples suggests that inclusion of B helps
in improving the OER rate by preventing the conversion of surface
Co to stable oxides. The Co-B film achieved a current density of 10
mA/cm2 at merely 280 mV, with potentiostatic stability
for 45 h in alkaline medium, highlighting its superior performance
than the powder catalyst. This work not only establishes the advantage
of developing thin-film catalysts but also presents a new approach
to understand the OER mechanism in metal borides.
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Gupta, Suraj; Jadhav, Harshada; Sinha, Sucharita; Miotello, Antonio; Patel, Maulik K.; Sarkar, Arindam; et al. (2019). Cobalt-Boride Nanostructured Thin Films with High
Performance and Stability for Alkaline Water Oxidation. ACS Publications. Collection. https://doi.org/10.1021/acssuschemeng.9b03995
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AUTHORS (7)
SG
Suraj Gupta
HJ
Harshada Jadhav
SS
Sucharita Sinha
AM
Antonio Miotello
MP
Maulik K. Patel
AS
Arindam Sarkar
NP
Nainesh Patel
KEYWORDS
anode catalystOER mechanismmetal boridesoxygen evolution reactionOER performanceElemental depthCobalt-Boride Nanostructured280 mVboron-free samplessurface CoHigh PerformanceOER rateCoOOH-type speciesCo-B filmmediumAlkaline Water Oxidation Nanocrystalline cobalt boridepowder catalystwater oxidation reactionthin-film catalystspotentiostatic stabilitylaser deposition45 h