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

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• 作者：Xue-Feng Lu ; Pei-Qin Liao ; Jia-Wei Wang ; Jun-Xi Wu ; Xun-Wei Chen ; Chun-Ting He ; Jie-Peng Zhang ; Gao-Ren Li ; Xiao-Ming Chen
• 刊名：Journal of the American Chemical Society
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：138
• 期：27
• 页码：8336-8339
• 全文大小：328K
• 年卷期：0
• ISSN：1520-5126

文摘

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.