CAJ | 학술논문

采用柠檬酸络合浸渍法制备了负载型钙钛矿氧化物 La 1-x Cex CoO3/ CeO2(x =0~0.3)催化剂，考察了不同 Ce 掺杂量对其催化氧化 NO 和抗硫性能的影响，并运用 X 射线衍射(XRD)、傅里叶红外光谱(FT-IR)、氮气物理吸附、程序升温还原(H2-TPR)、氧气程序升温脱附(O2-TPD)等手段对催化剂进行了表征。结果表明，催化剂的活性与其比表面积大小和氧化还原性质密切相关；其中，负载型钙钛矿 La0.8 Ce0.2 CoO3/ CeO2催化剂在300℃时催化氧化 NO 的转化率达78%。在添加 CeO2作载体后，不仅改善了非负载性钙钛矿的低温活性，而且抗硫性能也显著提高。
채용저몽산락합침지법제비료부재형개태광양화물 La 1-x Cex CoO3/ CeO2(x =0~0.3)최화제，고찰료불동 Ce 참잡량대기최화양화 NO 화항류성능적영향，병운용 X 사선연사(XRD)、부리협홍외광보(FT-IR)、담기물리흡부、정서승온환원(H2-TPR)、양기정서승온탈부(O2-TPD)등수단대최화제진행료표정。결과표명，최화제적활성여기비표면적대소화양화환원성질밀절상관；기중，부재형개태광 La0.8 Ce0.2 CoO3/ CeO2최화제재300℃시최화양화 NO 적전화솔체78%。재첨가 CeO2작재체후，불부개선료비부재성개태광적저온활성，이차항류성능야현저제고。
Supported perovskite-type catalysts La1-x Cex CoO3 / CeO2 (x = 0 ~ 0. 3) were synthesized through complexing impregnation with citric acid and characterized by X-ray diffraction ( XRD), Fourier transformedinfrared (FT-IR), nitrogen adsorption, H2 temperature-programmed reduction (H2-TPR), and O2 temperature-programmed desorption ( O2-TPD). The performance of NO catalytic oxidation and SO2 resistance wereinvestigated in the article. The results showed that the catalytic activity of La 1-x Cex CoO3 / CeO2 was closely related to the surface area and redox properties. Especially La 0. 8 Ce 0. 2 CoO 3/ CeO 2 achieved 78% NO conversion at 300 ℃. The introduction of CeO2 as support simultaneously enhanced the low temperature activity and SO2resistance.