一种碱性稳定的类金属有机框架氢氧化金属用于高效电催化氧气析出。
An Alkaline-Stable, Metal Hydroxide Mimicking Metal-Organic Framework for Efficient Electrocatalytic Oxygen Evolution.
机构信息
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, KLGHEI of Environment and Energy Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , Guangzhou 510275, China.
出版信息
J Am Chem Soc. 2016 Jul 13;138(27):8336-9. doi: 10.1021/jacs.6b03125. Epub 2016 Jun 29.
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.
将[Co2(μ-Cl)2(btta)]（MAF-X27-Cl，H2bbta =1H,5H-benzo(1,2-d:4,5-d')bistriazole）置于孔表面的开放金属位进行后合成离子交换，得到一种材料[Co2(μ-OH)2(bbta)]（MAF-X27-OH），其由开放金属位和氢氧根配体官能化，从而显著提高了氧析出反应（OER）的电催化活性（在 1.0 M KOH 溶液中 10.0 mA cm(-2)时的过电位为 292 mV）。同位素追踪实验进一步证实，氢氧根配体参与 OER 过程，提供了一种低能的骨架内偶联途径。
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