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Au/Fe(OH)3/LaFeO3催化劑的穩(wěn)定性研究
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內蒙古自治區(qū)自然科學基金重點項目(2010zd03);新世紀優(yōu)秀人才資助項目(NCET-06-0268)


Stability of Au/Fe(OH)3/LaFeO3 Catalyst
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    摘要:

    以LaFeO3為載體,通過Fe(OH)3對載體進行改性,采用沉積沉淀法制備納米金催化劑,并對催化劑進行XRD、XPS、AAS和BET測試,考察催化劑的活性和穩(wěn)定性。結果顯示,F(xiàn)e(OH)3助劑的加入,對催化劑的活性提高不明顯,但大大提高了催化劑在反應過程和放置過程中的穩(wěn)定性。加入助劑的Au/Fe(OH)3/LaFeO3催化劑,由于Fe(OH)3和活性組分的相互作用,減緩了金顆粒的聚集,使得放置近半年的催化劑和新鮮催化劑具有相近的活性和穩(wěn)定性

    Abstract:

    LaFeO3 and Fe(OH)3-modified LaFeO3 were used as supports for the nano-gold catalysts, respectively. The catalysts were prepared by a deposition- precipitation method and were characterized by XRD, XPS, AAS and BET. Furthermore, the activity and stability, involving the reaction and storage process, were investigated. The results demonstrate that the addition of Fe(OH)3 could improve the stability both in the continual reaction and the preserving process. Therefore the strong interaction between the gold species and Fe(OH)3 could inhibit the aggregation of gold particles and increase the stability of the catalyst.

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賈美林,圖 雅,薩嘎拉,王 獎,徐愛菊,照日格圖. Au/Fe(OH)3/LaFeO3催化劑的穩(wěn)定性研究[J].稀有金屬材料與工程,2013,42(5):967~970.[Jia Meilin, Tuya, Sagala, Wang Jiang, Xu Aiju, Zhaorigetu. Stability of Au/Fe(OH)3/LaFeO3 Catalyst[J]. Rare Metal Materials and Engineering,2013,42(5):967~970.]
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  • 收稿日期:2012-05-05
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