Abstract
Water oxidation is a required half-reaction for electrochemical water splitting. To date, the only well-established active oxygen-evolution catalysts stable under operating conditions and at rest in acidic aqueous media contain Ru or Ir, two of the scarcest non-radioactive elements on Earth. We report herein a nickel-manganese antimonate electrocatalyst with a rutile-type crystal structure that requires an initial voltammetric overpotential of 672 ± 9 mV to catalyze the oxidation of water to O2(g) at a rate corresponding to 10 mA cm-2 of current density when operated in contact with 1.0 M sulfuric acid. Under galvanostatic control, the overpotential initially rose from 670 mV but was then stable at 735 ± 10 mV for 168 h of continuous operation at 10 mA cm-2. We additionally provide an in-depth evaluation of the stability of the nickel-manganese antimonate electrocatalyst, including elemental characterization of the surface, bulk, and electrolyte before and after electrochemical operation.
| Original language | English |
|---|---|
| Pages (from-to) | 2103-2108 |
| Number of pages | 6 |
| Journal | Energy and Environmental Science |
| Volume | 10 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - Oct 1 2017 |
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ASJC Scopus subject areas
- Environmental Chemistry
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Pollution
Cite this
Crystalline nickel manganese antimonate as a stable water-oxidation catalyst in aqueous 1.0 M H2SO4 . / Moreno-Hernandez, Ivan A.; Macfarland, Clara A.; Read, Carlos G.; Papadantonakis, Kimberly M.; Brunschwig, Bruce S.; Lewis, Nathan S.
In: Energy and Environmental Science, Vol. 10, No. 10, 01.10.2017, p. 2103-2108.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Crystalline nickel manganese antimonate as a stable water-oxidation catalyst in aqueous 1.0 M H2SO4
AU - Moreno-Hernandez, Ivan A.
AU - Macfarland, Clara A.
AU - Read, Carlos G.
AU - Papadantonakis, Kimberly M.
AU - Brunschwig, Bruce S.
AU - Lewis, Nathan S
PY - 2017/10/1
Y1 - 2017/10/1
N2 - Water oxidation is a required half-reaction for electrochemical water splitting. To date, the only well-established active oxygen-evolution catalysts stable under operating conditions and at rest in acidic aqueous media contain Ru or Ir, two of the scarcest non-radioactive elements on Earth. We report herein a nickel-manganese antimonate electrocatalyst with a rutile-type crystal structure that requires an initial voltammetric overpotential of 672 ± 9 mV to catalyze the oxidation of water to O2(g) at a rate corresponding to 10 mA cm-2 of current density when operated in contact with 1.0 M sulfuric acid. Under galvanostatic control, the overpotential initially rose from 670 mV but was then stable at 735 ± 10 mV for 168 h of continuous operation at 10 mA cm-2. We additionally provide an in-depth evaluation of the stability of the nickel-manganese antimonate electrocatalyst, including elemental characterization of the surface, bulk, and electrolyte before and after electrochemical operation.
AB - Water oxidation is a required half-reaction for electrochemical water splitting. To date, the only well-established active oxygen-evolution catalysts stable under operating conditions and at rest in acidic aqueous media contain Ru or Ir, two of the scarcest non-radioactive elements on Earth. We report herein a nickel-manganese antimonate electrocatalyst with a rutile-type crystal structure that requires an initial voltammetric overpotential of 672 ± 9 mV to catalyze the oxidation of water to O2(g) at a rate corresponding to 10 mA cm-2 of current density when operated in contact with 1.0 M sulfuric acid. Under galvanostatic control, the overpotential initially rose from 670 mV but was then stable at 735 ± 10 mV for 168 h of continuous operation at 10 mA cm-2. We additionally provide an in-depth evaluation of the stability of the nickel-manganese antimonate electrocatalyst, including elemental characterization of the surface, bulk, and electrolyte before and after electrochemical operation.
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U2 - 10.1039/c7ee01486d
DO - 10.1039/c7ee01486d
M3 - Article
VL - 10
SP - 2103
EP - 2108
JO - Energy and Environmental Science
JF - Energy and Environmental Science
SN - 1754-5692
IS - 10
ER -