|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | 直接乙醇燃料电池PtSn/C电催化剂的合成表征和性能显示文摘采用多元醇法制备了 n( Pt) /n( Sn)比为 2∶ 1 ,3∶ 1 ,4∶ 1的 Pt Sn/C电催化剂 .通过 XRD,TEM、循环伏安和氢化学吸附技术对催化剂进行了表征 . TEM和 XRD结果表明 ,不同比例的 Pt Sn/C金属粒子的平均粒径均小于 4nm,且粒径分布较窄 ;该系列催化剂中 Pt具有 fcc结构 ;Pt Sn间的相互作用使 Pt晶格参数增大 .循环伏安和氢化学吸附实验结果表明 ,加入 Sn可抑制 Pt对氢的吸附 ,Pt3Sn/C对乙醇的氧化电流比Pt4 Sn/C高约 1倍 .用不同 n( Pt) /n( Sn)比的催化剂作为直接醇类燃料电池阳极电催化剂 ,在相同条件下 ,随着 Sn含量的增加 ,单电池最大输出功率逐渐增大 ,当 Sn含量继续增大时 ,单池性能反而下降 .导致不同比例 Pt Sn催化剂活性差别的原因可能是由于 Sn与 Pt间的合金化程度不同和催化剂粒子尺寸效应及 Sn含量对电池阻抗等几方面因素所致 .对 40 h寿命测试前后的阳极 Pt3Sn/C催化剂的分析 ( Energy dispersive X-rayanalysis,EDX)结果表明 ,Pt Sn含量在测试前后均有所降低 ,Pt | 姜鲁华 周振华 周卫江 王素力 汪国雄 孙公权 辛勤 | 2004 | 高等学校化学学报2004，25，8： | 13 |
| 2 | 碳纳米管担载PtSn阳极催化剂对乙醇的电催化氧化性能研究显示文摘以多壁碳纳米管(MWNTs)为载体制备了担载型PtSn纳米催化剂, 对其微观形貌和电催化性能进行了表征. 透射电镜(TEM)及X射线衍射(XRD) 测试结果表明, 以MWNTs为载体提高了PtSn 金属粒子的分散度, 粒径分布范围在1.5~6.5 nm 之间, PtSn/MWNTs 催化剂的平均粒径为3.6 nm. 循环伏安、 计时电流及DEFC单池的实验结果表明, 由于MWNTs 具有独特的结构及丰富的表面基团和较高的导电率, PtSn/MWNTs催化剂对乙醇的催化氧化表现出比PtSn/XC-72更高的活性. | 赵新生 孙公权 姜鲁华 毛庆 辛勤 衣宝廉 杨少华 | 2005 | 高等学校化学学报2005，26，7： | 11 |
| 3 | Effect of Strontium Addition to Platinum Catalyst for Propane Dehydrogenation显示文摘PtSnSr/HZSM-5 catalysts with different amounts of strontium were prepared by sequential impregnation method,and characterized by BET analysis,TEM,NH3-TPD,H2-TPR,TPO and TG techniques.The results showed that the addition of strontium could modify the characteristics and properties of both acid function and metal function of Pt-Sn-based catalysts.In this case,PtSnSr/HZSM-5 catalyst with an appropriate amount of Sr(1.2%) showed higher catalytic activity and lower amount of coke deposits than PtSn/HZSM-5 catalyst.However,excessive loading of Sr could facilitate the reduction of Sn,which was unfavorable to the reaction.Afterwards,1.0 m% of Na was added into the PtSnSr(1.2%)/HZSM-5 catalyst to improve the catalytic performance in propane dehydrogenation,and this catalyst displayed the best catalytic performance during our experiments.After having been subjected to reaction for 5h,the PtSnNa(1.0%)Sr(1.2%)/HZSM-5 catalyst had achieved a higher than 95% selectivity towards propene along with a corresponding propane conversion rate of 32.2%. | Huang Li Zhou Shijian Zhou Yuming Zhang Yiwei Zhang Shaobo Xu Jun | 2012 | China Petroleum Processing & Petrochemical Technology2012，14，3： | 11 |
| 4 | Ca或Ce对PtSn/MCM-41催化剂的结构及催化丙烷脱氢性能的影响显示文摘制备了Ca或Ce改性的PtSn/MCM-41催化剂,利用XRD、N2吸附-脱附、TPR、TEM和TGA等技术对所制备的催化剂进行了表征,采用微型催化反应装置评价了其催化丙烷脱氢的性能,并分析了反应后催化剂的积炭情况。结果表明,PtSn/MCM-41催化剂中加入Ca或Ce助剂后,增强了丙烷脱氢催化性能,这不仅与助剂和活性组分之间的强烈相互作用有关,而且Ca或Ce助剂的加入会减少由于积炭而导致催化剂的失活。 | 郭先芝 张希彬 杨太利 王淑荣 王彦美 吴世华 | 2013 | 离子交换与吸附2013，29，1： | 4 |
| 5 | Propane Dehydrogenation on PtSnNa/AlSBA-15 Catalyst:Influence of Tin as a Promoter显示文摘PtSnNa/AlSBA-15 catalysts with different amounts of Sn were prepared for propane dehydrogenation.The catalysts were characterized by XRF,BET,H2 chemisorption,NH3-TPD,H2-TPR,and TPO techniques.Test results indicated that the presence of tin not only modified the acid function and the interfacial character between metal and support,but also reduced the coke deposition effectively.Among these catalysts investigated thereby,the PtSn(0.7%)Na/AlSBA-15 catalyst had the best catalytic performance in terms of propane conversion and stability.With the continuous addition of Sn,more amounts of Sn0 species appeared,which was unfavorable to the reaction.The PtSn(0.7%)Na/AlSBA-15 catalyst was parametrically characterized in order to obtain necessary information to integrate the process operating conditions.A weight hourly space velocity of 3 h-1,a reaction temperature of 610 ℃ and a H2/C3H8 molar ratio of 0.25 were found to be optimum conditions for achieving a higher dehydrogenation activity of the catalyst. | Duan Yongzheng Zhou Yuming Zhang Yiwei Sheng Xiaoli Xue Mengwei | 2012 | China Petroleum Processing & Petrochemical Technology2012，14，1： | 4 |
| 6 | 直接甲醇燃料电池PtSn/C催化剂对甲醇氧化的电催化活性显示文摘采用低温固相反应法制备了直接甲醇燃料电池用PtSn/C阳极催化剂,采用XRD、TEM等测试方法对催化剂的晶体结构和粒径大小进行了表征.结果表明:采用低温固相反应法制备的PtSn/C催化剂和Pt/C催化剂均表现为Pt的fcc晶体结构;Sn的加入导致Pt的晶胞参数增大;与同法所制Pt/C催化剂相比较,PtSn/C催化剂中金属Pt在碳载体上分布较均匀,金属粒子的粒径较小,平均粒径约为4.8nm,从而具有更大的反应表面积.电化学测试表明,对于甲醇电氧化,PtSn/C催化剂具有比Pt/C催化剂更强的催化能力. | 陈玲 李晶晶 栾晓东 叶锋 王新东 | 2007 | 北京科技大学学报2007，29，10： | 4 |
| 7 | 不同载体的PtSn催化剂上丙烷脱氢性能的研究显示文摘考察了丙烷在Al2O3、MgAl2O4、ZnAl2O4等载体负载的Pt及PtSn催化剂上的脱氢反应性能,讨论了催化剂中锡组分的存在状态与丙烷脱氢性能的关系。 | 董文生 王浩静 王心葵 彭少逸 | 1999 | 天然气化工—C1化学与化工1999，24，3： | 3 |
| 8 | PtSn-Mg(Zn)AlO催化剂应用于乙烷脱氢反应研究显示文摘采用阴离子交换法合成了一系列不同Zn和Pt含量的PtSn-Mg (Zn) AlO催化剂用于乙烷脱氢反应。实验结果表明,在水滑石载体中掺杂少量的Zn对乙烷脱氢反应有明显影响。当Zn含量为2%(质量)时Pt基催化剂活性性能最优,在550℃时乙烷初始转化率达到27.1%,2 h平均转化率为21.6%。BET和SEM结果表明PtSn-Mg(Zn) AlO催化剂比PtSn-MgAlO催化剂比表面积更大,TEM结果显示,PtSn-Mg(Zn) AlO催化剂和PtSn-MgAlO催化剂的金属颗粒的平均直径分别为(1.49±0.31) nm和(2.0±0.23) nm,说明Zn的掺杂在一定程度上改变了催化剂的结构,能减小Pt颗粒的尺寸,更好地分散Pt颗粒,从而改善乙烷催化脱氢反应性能。此外,考察温度对乙烷脱氢反应性能影响,发现温度越高乙烷初始转化率越高,但催化剂越易失活;考察Pt负载量对乙烷脱氢反应性能的影响,发现增加Pt含量并不能使乙烷转化率得到相应倍数的增加,即增加Pt含量反而使Pt的利用率降低了,因此适量降低PtSn-Mg(2-Zn) AlO催化剂中Pt含量对研究乙烷脱氢反应有深远意义。 | 吴小平 王晨光 张琦 刘琪英 张兴华 马隆龙 | 2019 | 化工学报2019，70，11： | 2 |
| 9 | Influence of the Alkali Treatment of HZSM-5 Zeolite on Catalytic Performance of PtSn-Based Catalyst for Propane Dehydrogenation显示文摘The porous material ATZ with micro-mesopore hierarchical porosity was prepared by alkali treatment of parent HZSM-5 zeolite and applied for propane dehydrogenation. The zeolite samples were characterized by XRD, N2-physisorption, and NH 3-TPD analysis. The results showed that the alkali treatment can modify the physicochemical properties of HZSM-5 zeolite. In this case, the porous material ATZ showed larger external surface area with less acid sites as compared to the HZSM-5 zeolite. It was found out that the alkali treatment of HZSM-5 zeolite could promote the catalytic performance of PtSn/ATZ catalyst. The possible reason was ascribed to the low acidity of ATZ. Furthermore, the presence of mesopores could reduce the carbon deposits on the metallic surface, which was also favorable for the dehydrogenation reaction. | Huang Li Zhou Shijian Zhou Yuming Zhang Yiwei Xu Jun Wang Li | 2013 | China Petroleum Processing & Petrochemical Technology2013，15，2： | 2 |
| 10 | High stability three-dimensional porous PtSn nano-catalyst for ethanol electro-oxidation reaction显示文摘In addition to the theoretical research,direct ethanol fuel cells have great potential in practical applications.The performance of direct ethanol fuel cells largely depends on the electrocatalysts.Ptbased electrocatalysts have been promising candidates for advancing direct ethanol fuel cells for its high catalytic activity and great durability.Here,a PtSn catalyst with unique three-dimensional porous nanostructure has been designed and synthesized via a two-step liquid phase reduction reaction.Sn formed a self-supporting framework in PtSn alloy particles(~3.5 nm).In ethanol electro-oxidation reaction,the PtSn catalyst exhibited high mass activity and excellent recycling time compared with that of Pt/C.After the morphology characterization before and after potential cycling,the PtSn alloy-based nano-catalyst showed good stability.The PtSn catalysts effectively avoid structural instability due to the external carriers,and prolong the leaching time of Sn.In addition,the introduction of a certain amount of Sn can also solve the poisoning phenomenon of active sites on Pt surface.The design strategy of porous alloy nano-catalyst sheds light on its applications in direct ethanol fuel cells. | Yue Sun Haiyan Xiang Huimin Li Gang Yu Hong Chen Song Liu | 2020 | Chinese Chemical Letters2020，31，9： | 0 |
| 11 | 气象大厦闭路监控系统及故障处理显示文摘 | 陈百川 | 2005 | 陕西气象2005，，4： | 0 |
| 12 | 负载在分子筛的PtSn催化剂在丙烷脱氢的研究进展显示文摘丙烷临氢脱氢制备丙烯是丙烯的重要来源之一。本文综合概述了以ZSM-5和SAPO-34分子筛作为载体,不同的制备方法对PtSn催化剂在丙烷临氢脱氢反应中催化性能的影响。 | 段雪梅 段永正 周钰明 | 2012 | 中国化工贸易2012，4，10： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员