Effect of Hydrogen Treatment on the Catalytic Activity of Iron Oxide Based Materials Dispersed Over Activated Carbon: Investigations Toward Hydrogen Peroxide Decomposition
Effect of Hydrogen Treatment on the Catalytic Activity of Iron Oxide Based Materials Dispersed Over Activated Carbon: Investigations Toward Hydrogen Peroxide Decomposition
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DOI：
10.1007/s10562-009-0167-9
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发表时间：
2009-09
影响因子：
2.8
通讯作者：
C. S. Castro;L. Oliveira;M. C. Guerreiro
中科院分区：
文献类型：
--
作者：
C. S. Castro;L. Oliveira;M. C. Guerreiro
研究了氢处理（400℃/1 h）对分散在活性炭上的氧化铁基材料催化h2o2分解性能的影响。研究人员对两种不同的载体进行了评估：一种是商用活性炭（ACM），另一种是用废咖啡渣生产的活性炭（ACR）。采用XRD、SEM、n2吸附、XPS和TPR对催化剂进行了表征。主要结果表明，形成了具有高表面积（>800 m2g−1）的复合材料，并且氢处理导致了催化活性的显著提高，这可能与氢处理形成的还原铁（Fe2+和Fe0）的作用有关。此外，用ACR制备的催化剂比用ACM制备的催化剂具有更高的活性。
The effect of hydrogen treatment (400 °C/1 h) on the catalytic properties toward H2O2decomposition of iron oxide based materials dispersed over activated carbon were investigated. Two different supports were evaluated: a commercial activated carbon (ACM) and an activated carbon produced from spent coffee grounds (ACR). The catalysts were characterized using XRD, SEM, N2-sorption, XPS and TPR analysis. The main results suggest the formation of composites with high surface area (>800 m2g−1) and the hydrogen treatment resulted in a great increase in the catalytic activity, probably as a function of the reduced iron species (Fe2+and Fe0) formed with the treatment. Moreover, the catalyst prepared with ACR showed to be more active than that prepared from ACM.