Tunable Periodically Ordered Mesoporosity in Palladium Membranes Enables Exceptional Enhancement of Intrinsic Electrocatalytic Activity for Formic Acid Oxidation

被引：65

作者：

Ding, Jia ^{[1
]}

Liu, Zhi ^{[2
]}

Liu, Xiaorui ^{[1
]}

Liu, Bin ^{[1
]}

Liu, Jie ^{[1
]}

Deng, Yida ^{[5
]}

Han, Xiaopeng ^{[5
]}

Hu, Wenbin ^{[1
,3
,4
,5
]}

Zhong, Cheng ^{[1
,3
,4
,5
]}

机构：

[1] Tianjin Univ, Sch Mat Sci & Engn, Minist Educ, Key Lab Adv Ceram & Machining Technol, Tianjin 300072, Peoples R China

[2] Shanghai Jiao Tong Univ, Dept Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[3] Natl Univ Singapore, Joint Sch, Fuzhou 350207, Peoples R China

[4] Tianjin Univ, Int Campus Tianjin Univ, Fuzhou 350207, Peoples R China

[5] Tianjin Univ, Sch Mat Sci & Engn, Tianjin Key Lab Composite & Funct Mat, Tianjin 300072, Peoples R China

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2020年 / 59卷 / 13期

基金：

中国国家自然科学基金;

关键词：

direct formic acid fuel cells; formic acid oxidation; liquid crystal; mesoporosity; palladium electrocatalysts; ELECTROCHEMICAL OXIDATION; NANOPARTICLES; CATALYST; CARBON; REDUCTION; NITROGEN; NETWORKS; METHANOL; FILMS; ELECTROOXIDATION;

D O I：

10.1002/anie.201914649

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Developing superior electrocatalysts for formic acid oxidation (FAO) is the most crucial step in commercializing direct formic acid fuel cells. Herein, we electrodeposited palladium membranes with periodically ordered mesoporosity obtained by asymmetrically replicating the bicontinuous cubic phase structure of a lyotropic liquid-crystal template. The Pd membrane with the largest periodicity and highest degree of order delivered up to 90.5 m(2) g(-1) of electrochemical active surface area and 3.34 Amg(-1) electrocatalysis capability towards FAO, 3.8 and 7.8 times the values of the commercial Pd/C catalyst, respectively. By controlling the temperature and potential of the electrodeposition procedure, the periodicity area and order degree of the mesoporosity are highly tunable. These Pd membranes gave prototype formic acid fueled cells with 4.3 and 2.4 times the maximum current and power density of the commercial Pd/C catalyst.

引用

页码：5092 / 5101

页数：10

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