TY - JOUR
T1 - Topotactic transition of α-Co(OH)2 to β-Co(OH)2 anchored on CoO nanoparticles during electrochemical water oxidation
T2 - Synergistic electrocatalytic effects
AU - Kundu, Sumana
AU - Malik, Bibhudatta
AU - Prabhakaran, Amrutha
AU - Pattanayak, Deepak K.
AU - Pillai, Vijayamohanan K.
N1 - Publisher Copyright:
© 2017 The Royal Society of Chemistry.
PY - 2017/8/29
Y1 - 2017/8/29
N2 - Herein, we report a single step, anionic surfactant-assisted, low temperature-hydrothermal synthetic strategy of CoO nanoparticles anchored on β-Co(OH)2 nanosheets which show a low overpotential (295 mV @ 10 mA cm-2) for the oxygen evolution reaction (OER). They also demonstrate much better kinetic parameters compared to the state-of-the-art RuO2. Interestingly, under the OER operational conditions (in alkaline medium), the topotactic transformation of α-Co(OH)2 to a stable Brucite-like β-Co(OH)2 phase leads to a synergistic interaction between the β-Co(OH)2 sheets on the CoO nanoparticles for enhancing the OER electrocatalytic activity.
AB - Herein, we report a single step, anionic surfactant-assisted, low temperature-hydrothermal synthetic strategy of CoO nanoparticles anchored on β-Co(OH)2 nanosheets which show a low overpotential (295 mV @ 10 mA cm-2) for the oxygen evolution reaction (OER). They also demonstrate much better kinetic parameters compared to the state-of-the-art RuO2. Interestingly, under the OER operational conditions (in alkaline medium), the topotactic transformation of α-Co(OH)2 to a stable Brucite-like β-Co(OH)2 phase leads to a synergistic interaction between the β-Co(OH)2 sheets on the CoO nanoparticles for enhancing the OER electrocatalytic activity.
UR - http://www.scopus.com/inward/record.url?scp=85028655622&partnerID=8YFLogxK
U2 - 10.1039/c7cc06086f
DO - 10.1039/c7cc06086f
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C2 - 28820532
AN - SCOPUS:85028655622
SN - 1359-7345
VL - 53
SP - 9809
EP - 9812
JO - Chemical Communications
JF - Chemical Communications
IS - 70
ER -