CAJ | 학술논문

以氢氧化钾、碳酸钠和碳酸氢钠为沉淀剂，采用共沉淀法制备3种铁酸铜催化剂，并对其水煤气变换活性和热稳定性进行了评价。测试发现，以氢氧化钾为沉淀剂制得的催化剂表现出优异的水煤气变换活性。通过X射线粉末衍射仪（ XRD）、N2物理吸附（ N2-physisorption）、H2-程序升温还原（ H2-TPR）、CO2-程序升温脱附（ CO2-TPD）和循环伏安法（ CV）等技术手段研究了不同的沉淀剂对催化剂的微观结构和表面性质的影响。结果发现，氢氧化钾能有效促进CuFe2 O4的生成、抑制CuO和CuFe2 O4晶格的长大、促使CuO在催化剂表面的较好分散、增强催化剂的还原能力、增加弱碱性位点的数量。它们显著改善了催化剂的催化活性和热稳定性。
이경양화갑、탄산납화탄산경납위침정제，채용공침정법제비3충철산동최화제，병대기수매기변환활성화열은정성진행료평개。측시발현，이경양화갑위침정제제득적최화제표현출우이적수매기변환활성。통과X사선분말연사의（ XRD）、N2물리흡부（ N2-physisorption）、H2-정서승온환원（ H2-TPR）、CO2-정서승온탈부（ CO2-TPD）화순배복안법（ CV）등기술수단연구료불동적침정제대최화제적미관결구화표면성질적영향。결과발현，경양화갑능유효촉진CuFe2 O4적생성、억제CuO화CuFe2 O4정격적장대、촉사CuO재최화제표면적교호분산、증강최화제적환원능력、증가약감성위점적수량。타문현저개선료최화제적최화활성화열은정성。
Three kinds of CuFe2 O4 catalyts s were synthesized by cop-recipitation method using potassium hydroxide ( A) , sodium carbonate ( B) and sodium bicarob nate( C) as the precipitants.Their catalty ic activity and thre mal stability were evalau ted in water-g as shift reaction ( WGSR) .The micor structure and surface property fo as-prepared catalysts was investigated by X-ray diffraction (XRD), N2-physisorpit on, H2-temperature programmed reduction (H2-TPR), CO2-temperature programmed desorption (CO2-TPD) and cyclic voltammetry ( CV) .The results show that the catalyst prepared with potassium hydroxide as precipitant exhibits excellent WGSR activity. Potsa sium hydroxide plays an important role in promoting the generation of CuFe2 O4 , restraining growth of crystalline CuO and CuFe2 O4 , resulting in much better dispersion of CuO on the surface of catalyts s, enhancing the reducibility of catalsy ts, and increasing the amount of weak basic sites.These factors remarkably improve the activity and thermal stability of catla ysts.