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

2016; American Chemical Society; Volume: 138; Issue: 27 Linguagem: Inglês

10.1021/jacs.6b03125

1943-2984

Xue Feng Lu, Pei‐Qin Liao, Jia‐Wei Wang, Jun‐Xi Wu, Xunwei Chen, Chun‐Ting He, Jie‐Peng Zhang, Gao‐Ren Li, Xiao‐Ming Chen,

Advanced battery technologies research

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.