Intrinsically stable in situ generated electrocatalyst for long-term oxidation of acidic water at up to 80 °C

Manjunath Chatti, James L. Gardiner, Maxime Fournier, Bernt Johannessen, Tim Williams, Thomas R. Gengenbach, Narendra Pai, Cuong Nguyen, Douglas R. MacFarlane, Rosalie K. Hocking, Alexandr N. Simonov

Research output: Contribution to journalArticleResearchpeer-review

Abstract

Electrochemical water splitting in acidic conditions offers important advantages over that in alkaline systems, but the technological progress is limited by the lack of inexpensive and efficient anode catalysts that can stably operate at a low pH and elevated temperature. Here we demonstrate oxygen evolution catalysts that are based on non-noble metals, are formed in situ during electrooxidation of acidic water and exhibit a high stability in operation due to a self-healing mechanism. The highly disordered mixed metal oxides generated from dissolved cobalt, lead and iron precursors sustain high water oxidation rates at reasonable overpotentials. Moreover, utilizing a sufficiently robust electrode substrate allows for a continuous water oxidation at temperatures up to 80 °C and rates up to 500 mA cm−2 at overpotentials below 0.7 V with an essentially flat support and with no loss in activity. This robust operation of the catalysts is provided by the thermodynamically stable lead oxide matrix that accommodates homogeneously distributed catalytic dopants.

Original languageEnglish
Pages (from-to)457-465
Number of pages9
JournalNature Catalysis
Volume2
Issue number5
DOIs
Publication statusPublished - 1 May 2019

Cite this

Chatti, Manjunath ; Gardiner, James L. ; Fournier, Maxime ; Johannessen, Bernt ; Williams, Tim ; Gengenbach, Thomas R. ; Pai, Narendra ; Nguyen, Cuong ; MacFarlane, Douglas R. ; Hocking, Rosalie K. ; Simonov, Alexandr N. / Intrinsically stable in situ generated electrocatalyst for long-term oxidation of acidic water at up to 80 °C. In: Nature Catalysis. 2019 ; Vol. 2, No. 5. pp. 457-465.
@article{1c525393c8c2415f94a0fbad91810035,
title = "Intrinsically stable in situ generated electrocatalyst for long-term oxidation of acidic water at up to 80 °C",
abstract = "Electrochemical water splitting in acidic conditions offers important advantages over that in alkaline systems, but the technological progress is limited by the lack of inexpensive and efficient anode catalysts that can stably operate at a low pH and elevated temperature. Here we demonstrate oxygen evolution catalysts that are based on non-noble metals, are formed in situ during electrooxidation of acidic water and exhibit a high stability in operation due to a self-healing mechanism. The highly disordered mixed metal oxides generated from dissolved cobalt, lead and iron precursors sustain high water oxidation rates at reasonable overpotentials. Moreover, utilizing a sufficiently robust electrode substrate allows for a continuous water oxidation at temperatures up to 80 °C and rates up to 500 mA cm−2 at overpotentials below 0.7 V with an essentially flat support and with no loss in activity. This robust operation of the catalysts is provided by the thermodynamically stable lead oxide matrix that accommodates homogeneously distributed catalytic dopants.",
author = "Manjunath Chatti and Gardiner, {James L.} and Maxime Fournier and Bernt Johannessen and Tim Williams and Gengenbach, {Thomas R.} and Narendra Pai and Cuong Nguyen and MacFarlane, {Douglas R.} and Hocking, {Rosalie K.} and Simonov, {Alexandr N.}",
year = "2019",
month = "5",
day = "1",
doi = "10.1038/s41929-019-0277-8",
language = "English",
volume = "2",
pages = "457--465",
journal = "Nature Catalysis",
issn = "2520-1158",
publisher = "Nature Research",
number = "5",

}

Intrinsically stable in situ generated electrocatalyst for long-term oxidation of acidic water at up to 80 °C. / Chatti, Manjunath; Gardiner, James L.; Fournier, Maxime; Johannessen, Bernt; Williams, Tim; Gengenbach, Thomas R.; Pai, Narendra; Nguyen, Cuong; MacFarlane, Douglas R.; Hocking, Rosalie K.; Simonov, Alexandr N.

In: Nature Catalysis, Vol. 2, No. 5, 01.05.2019, p. 457-465.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Intrinsically stable in situ generated electrocatalyst for long-term oxidation of acidic water at up to 80 °C

AU - Chatti, Manjunath

AU - Gardiner, James L.

AU - Fournier, Maxime

AU - Johannessen, Bernt

AU - Williams, Tim

AU - Gengenbach, Thomas R.

AU - Pai, Narendra

AU - Nguyen, Cuong

AU - MacFarlane, Douglas R.

AU - Hocking, Rosalie K.

AU - Simonov, Alexandr N.

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Electrochemical water splitting in acidic conditions offers important advantages over that in alkaline systems, but the technological progress is limited by the lack of inexpensive and efficient anode catalysts that can stably operate at a low pH and elevated temperature. Here we demonstrate oxygen evolution catalysts that are based on non-noble metals, are formed in situ during electrooxidation of acidic water and exhibit a high stability in operation due to a self-healing mechanism. The highly disordered mixed metal oxides generated from dissolved cobalt, lead and iron precursors sustain high water oxidation rates at reasonable overpotentials. Moreover, utilizing a sufficiently robust electrode substrate allows for a continuous water oxidation at temperatures up to 80 °C and rates up to 500 mA cm−2 at overpotentials below 0.7 V with an essentially flat support and with no loss in activity. This robust operation of the catalysts is provided by the thermodynamically stable lead oxide matrix that accommodates homogeneously distributed catalytic dopants.

AB - Electrochemical water splitting in acidic conditions offers important advantages over that in alkaline systems, but the technological progress is limited by the lack of inexpensive and efficient anode catalysts that can stably operate at a low pH and elevated temperature. Here we demonstrate oxygen evolution catalysts that are based on non-noble metals, are formed in situ during electrooxidation of acidic water and exhibit a high stability in operation due to a self-healing mechanism. The highly disordered mixed metal oxides generated from dissolved cobalt, lead and iron precursors sustain high water oxidation rates at reasonable overpotentials. Moreover, utilizing a sufficiently robust electrode substrate allows for a continuous water oxidation at temperatures up to 80 °C and rates up to 500 mA cm−2 at overpotentials below 0.7 V with an essentially flat support and with no loss in activity. This robust operation of the catalysts is provided by the thermodynamically stable lead oxide matrix that accommodates homogeneously distributed catalytic dopants.

UR - http://www.scopus.com/inward/record.url?scp=85066504256&partnerID=8YFLogxK

U2 - 10.1038/s41929-019-0277-8

DO - 10.1038/s41929-019-0277-8

M3 - Article

VL - 2

SP - 457

EP - 465

JO - Nature Catalysis

JF - Nature Catalysis

SN - 2520-1158

IS - 5

ER -