TY  - JOUR
JF  - ChemistrySelect
AV  - public
KW  - Science & Technology
KW  -  Physical Sciences
KW  -  Chemistry
KW  -  Multidisciplinary
KW  -  Chemistry
KW  -  Continuous hydrothermal flow synthesis
KW  -  MnO2
KW  -  doping
KW  -  oxygen reduction
KW  -  oxygen evolution
KW  -  Zn-air batteries
KW  -  ZINC-AIR BATTERIES
KW  -  LITHIUM-ION BATTERIES
KW  -  HIGH-PERFORMANCE
KW  -  TEMPERATURE SYNTHESIS
KW  -  NEGATIVE ELECTRODES
KW  -  MANGANESE-DIOXIDE
KW  -  WATER OXIDATION
KW  -  ALKALINE MEDIA
KW  -  OXIDE
KW  -  ELECTROCATALYSTS
IS  - 9
SP  - 2613
SN  - 2365-6549
A1  - Lubke, M
A1  - Sumboja, A
A1  - McCafferty, L
A1  - Armer, CF
A1  - Handoko, AD
A1  - Du, Y
A1  - McColl, K
A1  - Cora, F
A1  - Brett, D
A1  - Liu, Z
A1  - Darr, JA
UR  - https://doi.org/10.1002/slct.201702514
VL  - 3
N2  - Nano?sized ??MnO2 nanorods doped with Co or Ru were directly synthesized using a continuous hydrothermal synthesis process (production rate 10?g h?1) and investigated as relatively inexpensive (due to the small Ru content) bifunctional catalysts for both the Oxygen Reduction Reaction (ORR) and Oxygen Evolution Reaction (OER). The materials were extensively characterized using a range of analytical methods; these including Extended X?Ray Absorption Fine Structure (EXAFS) spectroscopy measurements, which was accompanied by density functional theory studies, in order to elucidate the role of dopants in ??MnO2 structure. Electrochemical ORR and OER investigations of the as?prepared doped ??MnO2 nanomaterials were compared to more expensive Pt/C or RuO2 catalysts. The doped manganese oxide nanomaterials were used as bifunctional catalysts in the positive electrode of zinc air batteries (with oversized zinc metal negative electrode and limited density of discharge window) and displayed excellent performance (the overpotential was 0.77 and 0.68?V for ??MnO2 modified with 7.6 at% Co and 9.4 at% Ru, respectively). Overall, as a result of doping, this study achieved improved bifunctional catalytic activities of metal oxide catalysts, which was comparable to more expensive alternatives.
EP  - 2622
ID  - discovery10049213
PB  - WILEY-V C H VERLAG GMBH
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
TI  - Transition-Metal-Doped alpha-MnO2 Nanorods as Bifunctional Catalysts for Efficient Oxygen Reduction and Evolution Reactions
Y1  - 2018/03/05/
ER  -