TY - JOUR
T1 - Phosphorylated manganese oxide electrodeposited from ionic liquid as a stable, high efficiency water oxidation catalyst
AU - Izgorodin, Alex
AU - Hocking, Rosalie
AU - Winther-Jensen, Orawan
AU - Hilder, Matthias
AU - Winther Jensen, Bjorn
AU - MacFarlane, Douglas R.
PY - 2013/2/1
Y1 - 2013/2/1
N2 - Efficient production of hydrogen via water splitting is an important goal that would represent a significant step towards truly sustainable supplies of energy. However, currently available catalysts for water electrolysis are either too low in efficiency or too unstable to be practical in this context. Recognizing the very high stability of manganese phosphate, we describe here a novel catalyst material based on manganese oxide that is both stabilized and sensitized by a surface phosphorylation reaction in an ionic liquid electrodeposition process. XPS and EXAFS data show that the surface of the MnOx contains phosphorous at P to Mn ratio of ∼1:2, indicating that the surface layer contains both phosphate characteristics and oxide characteristics. The catalyst stability was significantly enhanced compared to the previously reported manganese oxide catalysts and more than 25 h of continuous water oxidation is demonstrated.
AB - Efficient production of hydrogen via water splitting is an important goal that would represent a significant step towards truly sustainable supplies of energy. However, currently available catalysts for water electrolysis are either too low in efficiency or too unstable to be practical in this context. Recognizing the very high stability of manganese phosphate, we describe here a novel catalyst material based on manganese oxide that is both stabilized and sensitized by a surface phosphorylation reaction in an ionic liquid electrodeposition process. XPS and EXAFS data show that the surface of the MnOx contains phosphorous at P to Mn ratio of ∼1:2, indicating that the surface layer contains both phosphate characteristics and oxide characteristics. The catalyst stability was significantly enhanced compared to the previously reported manganese oxide catalysts and more than 25 h of continuous water oxidation is demonstrated.
KW - Ionic liquid
KW - Manganese (IV) oxide
KW - Water oxidation
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U2 - 10.1016/j.cattod.2012.06.007
DO - 10.1016/j.cattod.2012.06.007
M3 - Article
AN - SCOPUS:84870565394
SN - 0920-5861
VL - 200
SP - 36
EP - 40
JO - Catalysis Today
JF - Catalysis Today
IS - 1
ER -
