Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL) , EPFL-ISIC-LSCI, BCH 3305, Lausanne, CH 1015, Switzerland.
J Am Chem Soc. 2014 Nov 26;136(47):16481-4. doi: 10.1021/ja5096733. Epub 2014 Nov 12.
Cost-effective production of solar fuels requires robust and earth-abundant oxygen evolution reaction (OER) catalysts. Herein, we report that ultrathin nanoplates of cobalt-manganese layered double hydroxide (CoMn LDH) are a highly active and stable oxygen evolution catalyst. The catalyst was fabricated by a one-pot coprecipitation method at room temperature, and its turnover frequency (TOF) is more than 20 times higher than the TOFs of Co and Mn oxides and hydroxides, and 9 times higher than the TOF of a precious IrO2 catalyst. The activity of the catalyst was promoted by anodic conditioning, which was proposed to form amorphous regions and reactive Co(IV) species on the surface. The stability of the catalyst was demonstrated by continued electrolysis.
高效经济地制备太阳能燃料需要稳定且丰富的氧气析出反应（OER）催化剂。本文报道了一种超薄钴锰层状双氢氧化物（CoMn LDH）纳米片，其作为高效稳定的氧气析出催化剂。该催化剂通过室温下的一步共沉淀法制备，其周转频率（TOF）比 Co 和 Mn 的氧化物和氢氧化物的 TOF 高 20 多倍，比 IrO2 等贵金属催化剂的 TOF 高 9 倍。通过阳极预处理来提高催化剂的活性，该方法被提出是在表面形成非晶区和具有反应活性的 Co(IV)物种。通过持续的电解对催化剂的稳定性进行了验证。
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