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层状氧化锰碎片是分子前体在粘土上转化后的真正的水氧化催化剂。

Fragments of layered manganese oxide are the real water oxidation catalyst after transformation of molecular precursor on clay.

机构信息

Department of Chemistry and Center of Climate Change and Global Warming, Institute for Advanced Studies in Basic Sciences (IASBS) , Zanjan, 45137-66731 Iran.

出版信息

J Am Chem Soc. 2014 May 21;136(20):7245-8. doi: 10.1021/ja5028716. Epub 2014 May 7.

DOI:10.1021/ja5028716
PMID:24798550
Abstract

A binuclear manganese molecular complex (OH2)(terpy)Mn(μ-O)2Mn(terpy)(OH2) (1) is the most prominent structural and functional model of the water-oxidizing Mn complex operating in plants and cyanobacteria. Supported on montmorillonite clay and using Ce(IV) as a chemical oxidant, 1 has been reported to be one of the best Mn-based molecular catalysts toward water oxidation. By X-ray absorption spectroscopy and kinetic analysis of the oxygen evolution reaction, we show that (OH2)(terpy)Mn(μ-O)2Mn(terpy)(OH2) is transformed into layered type Mn-oxide particles which are the actual water oxidation catalyst.

摘要

双核锰分子配合物(OH2)(terpy)Mn(μ-O)2Mn(terpy)(OH2)（1）是在植物和蓝藻中起作用的水氧化 Mn 配合物的最突出的结构和功能模型。负载在蒙脱石粘土上，并使用 Ce(IV) 作为化学氧化剂，1 已被报道为最有前途的 Mn 基分子催化剂之一，可用于水氧化。通过 X 射线吸收光谱和氧气析出反应的动力学分析，我们表明(OH2)(terpy)Mn(μ-O)2Mn(terpy)(OH2)转化为层状类型的 Mn-氧化物颗粒，这是实际的水氧化催化剂。

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