Abstract
The chlorine-evolution reaction (CER) is a common, commercially valuable electrochemical reaction, and is practiced at industrial scale globally. A precious metal solid solution of RuO 2 or IrO 2 with TiO 2 is the predominant electrocatalyst for the CER. Herein we report that materials comprised only of non-precious metal elements, specifically crystalline transition-metal antimonates (TMAs) such as NiSb 2 O x , CoSb 2 O x , and MnSb 2 O x , are moderately active, stable catalysts for the electrochemical oxidation of chloride to chlorine under conditions relevant to the commercial chlor-alkali process. Specifically, CoSb 2 O x exhibited a galvanostatic potential of 1.804 V vs. NHE at 100 mA cm -2 of Cl 2 (g) production from aqueous pH = 2.0, 4.0 M NaCl after 250 h of operation. Studies of the bulk and surface of the electrocatalyst and the composition of the electrolyte before and after electrolysis indicated minimal changes in the surface structure and intrinsic activity of CoSb 2 O x as a result of Cl 2 (g) evolution under these conditions.
| Original language | English |
|---|---|
| Pages (from-to) | 1241-1248 |
| Number of pages | 8 |
| Journal | Energy and Environmental Science |
| Volume | 12 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - Apr 1 2019 |
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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, cobalt, and manganese antimonates as electrocatalysts for the chlorine evolution reaction. / Moreno-Hernandez, Ivan A.; Brunschwig, Bruce S.; Lewis, Nathan S.
In: Energy and Environmental Science, Vol. 12, No. 4, 01.04.2019, p. 1241-1248.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Crystalline nickel, cobalt, and manganese antimonates as electrocatalysts for the chlorine evolution reaction
AU - Moreno-Hernandez, Ivan A.
AU - Brunschwig, Bruce S.
AU - Lewis, Nathan S
PY - 2019/4/1
Y1 - 2019/4/1
N2 - The chlorine-evolution reaction (CER) is a common, commercially valuable electrochemical reaction, and is practiced at industrial scale globally. A precious metal solid solution of RuO 2 or IrO 2 with TiO 2 is the predominant electrocatalyst for the CER. Herein we report that materials comprised only of non-precious metal elements, specifically crystalline transition-metal antimonates (TMAs) such as NiSb 2 O x , CoSb 2 O x , and MnSb 2 O x , are moderately active, stable catalysts for the electrochemical oxidation of chloride to chlorine under conditions relevant to the commercial chlor-alkali process. Specifically, CoSb 2 O x exhibited a galvanostatic potential of 1.804 V vs. NHE at 100 mA cm -2 of Cl 2 (g) production from aqueous pH = 2.0, 4.0 M NaCl after 250 h of operation. Studies of the bulk and surface of the electrocatalyst and the composition of the electrolyte before and after electrolysis indicated minimal changes in the surface structure and intrinsic activity of CoSb 2 O x as a result of Cl 2 (g) evolution under these conditions.
AB - The chlorine-evolution reaction (CER) is a common, commercially valuable electrochemical reaction, and is practiced at industrial scale globally. A precious metal solid solution of RuO 2 or IrO 2 with TiO 2 is the predominant electrocatalyst for the CER. Herein we report that materials comprised only of non-precious metal elements, specifically crystalline transition-metal antimonates (TMAs) such as NiSb 2 O x , CoSb 2 O x , and MnSb 2 O x , are moderately active, stable catalysts for the electrochemical oxidation of chloride to chlorine under conditions relevant to the commercial chlor-alkali process. Specifically, CoSb 2 O x exhibited a galvanostatic potential of 1.804 V vs. NHE at 100 mA cm -2 of Cl 2 (g) production from aqueous pH = 2.0, 4.0 M NaCl after 250 h of operation. Studies of the bulk and surface of the electrocatalyst and the composition of the electrolyte before and after electrolysis indicated minimal changes in the surface structure and intrinsic activity of CoSb 2 O x as a result of Cl 2 (g) evolution under these conditions.
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U2 - 10.1039/c8ee03676d
DO - 10.1039/c8ee03676d
M3 - Article
VL - 12
SP - 1241
EP - 1248
JO - Energy and Environmental Science
JF - Energy and Environmental Science
SN - 1754-5692
IS - 4
ER -