An Alkaline-Stable, Metal Hydroxide Mimicking Metal–Organic Framework for Efficient Electrocatalytic Oxygen Evolution

Postsynthetic ion exchange of [Co2(μ-Cl)2(btta)] (MAF-X27-Cl, H2bbta =1H,5H-benzo­(1,2-d:4,5-d′)­bistriazole) possessing open metal sites on its pore surface yields a material [Co2(μ-OH)2(bbta)] (MAF-X27-OH) functionalized by both open metal sites and hydroxide ligands, giving drastically improved e...

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Published inJournal of the American Chemical Society Vol. 138; no. 27; pp. 8336 - 8339
Main Authors Lu, Xue-Feng, Liao, Pei-Qin, Wang, Jia-Wei, Wu, Jun-Xi, Chen, Xun-Wei, He, Chun-Ting, Zhang, Jie-Peng, Li, Gao-Ren, Chen, Xiao-Ming
Format Journal Article
LanguageEnglish
Published United States American Chemical Society 13.07.2016
Subjects
ion exchange
isotope labeling
ligands
oxygen production
potassium hydroxide
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ISSN0002-7863
1520-5126
1520-5126
DOI10.1021/jacs.6b03125

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Summary:Postsynthetic ion exchange of [Co2(μ-Cl)2(btta)] (MAF-X27-Cl, H2bbta =1H,5H-benzo­(1,2-d:4,5-d′)­bistriazole) possessing open metal sites on its pore surface yields a material [Co2(μ-OH)2(bbta)] (MAF-X27-OH) functionalized by both open metal sites and hydroxide ligands, giving drastically improved electrocatalytic activities for the oxygen evolution reaction (an overpotential of 292 mV at 10.0 mA cm–2 in 1.0 M KOH solution). Isotope tracing experiments further confirm that the hydroxide ligands are involved in the OER process to provide a low-energy intraframework coupling pathway.
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ISSN:0002-7863
1520-5126
1520-5126
DOI:10.1021/jacs.6b03125