Cu含量對(duì)Pd-Cu/鋁土礦CO氧化催化劑結(jié)構(gòu)和性能的影響(英文)
發(fā)布時(shí)間:2022-01-26 08:05
利用資源豐富的天然鋁土礦經(jīng)Na OH溶液水熱處理后焙燒,獲得比表面積達(dá)174 m2·g-1鋁土礦載體,制備了雙金屬PdCu為活性組分的催化劑,金屬Pd負(fù)載量為0.5%(質(zhì)量百分?jǐn)?shù)),以CO氧化反應(yīng)為探針?lè)磻?yīng),詳細(xì)考察了Cu含量的變化對(duì)催化劑物化性能的影響。研究發(fā)現(xiàn),Cu的引入有利于提高金屬Pd的分散度,同時(shí)隨著Cu含量的變化,金屬Pd與Cu之間以及金屬與鋁土礦載體之間的相互作用隨之改變。催化劑的CO氧化反應(yīng)性能評(píng)價(jià)結(jié)果表明,Pd和Cu負(fù)載量分別為0.5%和4%的樣品(PdCu4/MB)催化反應(yīng)性能最佳。結(jié)合表征結(jié)果認(rèn)為,PdCu4/MB的高活性歸因于良好的Pd和Cu分散度,金屬Pd、Cu以及金屬與載體之間較強(qiáng)的相互作用。此外,CO-TPD表征結(jié)果說(shuō)明較強(qiáng)的CO吸附能力和從載體中獲取氧的能力也有利于提高PdCu4/MB樣品的CO氧化反應(yīng)性能。
【文章來(lái)源】:無(wú)機(jī)化學(xué)學(xué)報(bào). 2016,32(10)北大核心SCICSCD
【文章頁(yè)數(shù)】:9 頁(yè)
【文章目錄】:
0 Introduction
1 Experimental
1.1 Catalysts preparation
1.1.1 Materials
1.1.2 Synthesis
1.2 Characterizations
1.3 Evaluation of catalytic performance
2 Results and discussion
2.1 Characterizations
2.1.1 Crystal structure and texture of the Pd-Cu/MB catalyst
2.1.2 Reduction property of the Pd-Cu/MB catalyst
2.1.3 Surface basicity of the Pd-Cu/MB catalyst
2.1.4 CO-TPD characterization of the Pd-Cu/MB catalyst
2.2 Catalytic activity for CO oxidation of the Pd-Cu/MB catalyst
2.3 Discussions
3 Conclusions
本文編號(hào):3610139
【文章來(lái)源】:無(wú)機(jī)化學(xué)學(xué)報(bào). 2016,32(10)北大核心SCICSCD
【文章頁(yè)數(shù)】:9 頁(yè)
【文章目錄】:
0 Introduction
1 Experimental
1.1 Catalysts preparation
1.1.1 Materials
1.1.2 Synthesis
1.2 Characterizations
1.3 Evaluation of catalytic performance
2 Results and discussion
2.1 Characterizations
2.1.1 Crystal structure and texture of the Pd-Cu/MB catalyst
2.1.2 Reduction property of the Pd-Cu/MB catalyst
2.1.3 Surface basicity of the Pd-Cu/MB catalyst
2.1.4 CO-TPD characterization of the Pd-Cu/MB catalyst
2.2 Catalytic activity for CO oxidation of the Pd-Cu/MB catalyst
2.3 Discussions
3 Conclusions
本文編號(hào):3610139
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