临界点干燥仪制备的Pt-P25的电催化析氢反应性能探究  

Research on Electrocatalytic Hydrogen Evolution Reaction Performance of Pt-P25 Prepared by Critical Point Drier

作　　者：邹函君[1] 常秋翔 杨文达 张斌[1] 公祥南[1] 王桂文[1] 周楷[1] ZOU Hanjun;CHANG Qiuxiang;YANG Wenda;ZHANG Bin;GONG Xiangnan;WANG Guiwen;ZHOU Kai(Analytical and Testing Center,Chongqing University,Chongqing 400030,China)

机构地区：[1]重庆大学分析测试中心,重庆400030

出　　处：《硅酸盐通报》2021年第2期658-663,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金青年项目(11904039)。

摘　　要：在各种制氢工艺中,电解水是一种获得氢能源的重要途径,Pt是析氢反应(HER)中最理想的催化剂。由于Pt基材料的稀缺性和高成本限制了其大规模应用,因此迫切需要开发一种低含量、高效的铂催化剂。P25是一种晶格缺陷密度很高的混晶型TiO_(2),载流子浓度大,具有良好的催化效果。本文采用临界点干燥仪,以商业化混晶TiO_(2)(P25)为基底,制备了Pt负载的TiO_(2)(Pt-P25)催化剂,运用XRD、TEM和XPS分析了催化剂的结构和形貌,探索了不同临界点干燥条件下Pt-P25的电催化HER性能。结果表明,临界点干燥法成功制备出了Pt原子簇负载的TiO_(2),且在一定的条件下,当二氧化碳进气速率为慢速、交换速率为7、出气加热速率为中速时,Pt-P25的电催化HER性能最好。Among various hydrogen production processes,electrochemical water splitting is an important way to obtain hydrogen energy,and Pt is the most ideal catalyst for the hydrogen evolution reaction(HER).Nevertheless,large-scale application of Pt-based materials in HER are limited due to their scarcity and high cost,there is an urgent need to develop a low content and efficient platinum catalyst.P25 is a kind of hybrid titanium dioxide with high lattice defect density and high current carrier concentration,which has good catalytic effect.Commercially available mixed crystal TiO_(2)(P25)as catalysts supported Pt(Pt-P25)were prepared by a critical point drier,the structure and morphology of catalysts were analyzed by XRD、TEM and XPS,and the electro-catalytic HER performance of Pt-P25 were explored in different critical point drying conditions.The results show that TiO_(2)supported Pt atom cluster is successfully prepared by the critical point drying method.Under certain conditions,electro-catalytic HER of Pt-P25 is the best when carbon dioxide intake rate is slow,exchange rate is 7,and outlet gas heating rate is med.

关 键 词：二氧化钛 铂催化剂 电催化 析氢反应 临界点干燥 

分 类 号：O646.51[理学—物理化学]