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Title: Role of LiCoO2 Surface Terminations in Oxygen Reduction and Evolution Kinetics

Journal Article · · Journal of Physical Chemistry Letters
 [1];  [2];  [1];  [2];  [3];  [1]
  1. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  3. Univ. of California, San Diego, CA (United States)

We studied oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) activities of LiCoO2 nanorods with sizes in the range from 9 to 40 nm in alkaline solution. We also terminated the sides of these nanorods with low-index surfaces such as (003), while the tips were terminated largely with high-index surfaces such as (104), as revealed by high-resolution transmission electron microscopy. Electron energy loss spectroscopy demonstrated that low-spin Co3+ prevailed on the sides, while the tips exhibited predominantly high- or intermediate-spin Co3+. Finally, we correlated the electronic and atomic structure to higher specific ORR and OER activities at the tips as compared to the sides, which was accompanied by more facile redox of Co2+/3+ and higher charge transferred per unit area. These findings highlight the critical role of surface terminations and electronic structures of transition-metal oxides on the ORR and OER activity.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE); USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725; EE0000458; DMR 08-019762
OSTI ID:
1265784
Alternate ID(s):
OSTI ID: 1279418
Journal Information:
Journal of Physical Chemistry Letters, Vol. 6, Issue 8; ISSN 1948-7185
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 51 works
Citation information provided by
Web of Science

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Cited By (14)

Engineering electrocatalytic activity in nanosized perovskite cobaltite through surface spin-state transition journal May 2016
Atomic-Scale CoO x Species in Metal-Organic Frameworks for Oxygen Evolution Reaction journal August 2017
Spin state engineered Zn x Co 3−x O 4 as an efficient oxygen evolution electrocatalyst
  • Ramsundar, Rani Mohan; Pillai, Vijayamohanan Kunjukrishna; Joy, Pattayil Alias
  • Physical Chemistry Chemical Physics, Vol. 20, Issue 46 https://doi.org/10.1039/c8cp06641h
journal January 2018
Unified structural motifs of the catalytically active state of Co(oxyhydr)oxides during the electrochemical oxygen evolution reaction journal September 2018
Boosting reversible oxygen electrocatalysis with enhanced interfacial pyridinic-N–Co bonding in cobalt oxide/mesoporous N-doped graphene hybrids journal January 2018
Evidence that Crystal Facet Orientation Dictates Oxygen Evolution Intermediates on Rutile Manganese Oxide journal February 2018
An Insight on the Electrocatalytic Mechanistic Study of Pristine Ni MOF (BTC) in Alkaline Medium for Enhanced OER and UOR journal July 2018
LiCoO2 particles used in Li-ion batteries induce primary mutagenicity in lung cells via their capacity to generate hydroxyl radicals journal January 2020
Nanoscale structural oscillations in perovskite oxides induced by oxygen evolution journal October 2016
π‐Conjugated Molecule Boosts Metal–Organic Frameworks as Efficient Oxygen Evolution Reaction Catalysts journal October 2018
Cations in Octahedral Sites: A Descriptor for Oxygen Electrocatalysis on Transition-Metal Spinels journal April 2017
Bifunctional application of sodium cobaltate as a catalyst and captor through CO oxidation and subsequent CO 2 chemisorption processes journal January 2016
Transition metal oxide-based oxygen reduction reaction electrocatalysts for energy conversion systems with aqueous electrolytes journal January 2018
Electronic Structure Engineering of LiCoO 2 toward Enhanced Oxygen Electrocatalysis journal February 2019

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