Cobalt analogs of Ru-based water oxidation catalysts: overcoming thermodynamic instability and kinetic lability to achieve electrocatalytic O2 evolution
Cobalt analogs of Ru-based water oxidation catalysts: overcoming thermodynamic instability and kinetic lability to achieve electrocatalytic O2 evolution
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DOI：
10.1039/c2sc20755a
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发表时间：
2012-08
期刊：
影响因子：
8.4
通讯作者：
Matthew L. Rigsby;Sukanta Mandal;W. Nam;Lara C. Spencer;A. Llobet;S. Stahl
中科院分区：
文献类型：
--
作者：
Matthew L. Rigsby;Sukanta Mandal;W. Nam;Lara C. Spencer;A. Llobet;S. Stahl
几个双核钴（III）配合物，模仿钌基水氧化催化剂已被制备。最初的配合物表现出热力学不稳定性和动力学不稳定性，复杂的努力，使用这些钴配合物作为电催化剂的水氧化。双核钴（III）配合物支持的桥接bispyridylpyrazolate（bpp）配体克服了这些限制。两个bpp-连接的二钴（III）-过氧配合物的制备和结构表征，这些配合物的电化学研究支持其作为分子电催化剂在酸性条件下（pH 2.1）的水氧化的能力。
Several binuclear cobalt(III) complexes that mimic Ru-based water oxidation catalysts have been prepared. The initial complexes exhibited thermodynamic instability and kinetic lability that complicated efforts to use these cobalt complexes as electrocatalysts for water oxidation. Binuclear cobalt(III) complexes supported by a bridging bispyridylpyrazolate (bpp) ligand overcome these limitations. Two bpp-ligated dicobalt(III)-peroxo complexes were prepared and structurally characterized, and electrochemical investigation of these complexes supports their ability to serve as molecular electrocatalysts for water oxidation under acidic conditions (pH 2.1).