文献类型：期刊文献

英文题名：Bilayer MXene-Derived Carbon-Encapsulated Palladium Nanocatalysts: Engineering Robust Electronic and Chemical Interfaces for Oxygen Reduction and Zinc-Air Batteries

作者：Yan, Fangfang[1,2];Zhang, Hucheng[1];Wang, Haiyan[1];Jia, Huanli[1,2];Wang, Jianji[1]

第一作者：Yan, Fangfang

通讯作者：Zhang, HC[1];Wang, JJ[1]

机构：[1]Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine C, Sch Chem & Chem Engn, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China;[2]Xinxiang Univ, Sch 3D Printing, Xinxiang 453003, Henan, Peoples R China

第一机构：Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine C, Sch Chem & Chem Engn, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China

通讯机构：[1]corresponding author), Henan Normal Univ, Collaborat Innovat Ctr Henan Prov Green Mfg Fine C, Sch Chem & Chem Engn, Key Lab Green Chem Media & React,Minist Educ, Xinxiang 453007, Henan, Peoples R China.

年份：0

外文期刊名：ADVANCED ENERGY MATERIALS

收录：;EI(收录号：20225113260625);Scopus(收录号：2-s2.0-85143972082);WOS:【SCI-EXPANDED(收录号:WOS:000895689400001)】；

基金：Acknowledgements This work was supported by the National Natural Science Foundation of China (21573059 and U1704251), and by the "111" Project (No. D17007).

语种：英文

外文关键词：electrocatalysis; MXene-derived carbon; oxygen reduction; Pd catalysts; Zn-air batteries

摘要：Designing highly active and durable electrocatalysts remain an ongoing challenge in the oxygen reduction reaction (ORR). Here, the reductive IL/Ti3C2Tx(FA) is produced in a water-free mixture of formic acid (FA), ionic liquid (IL) and LiF, subsequently, the simultaneous reduction encapsulation trap the Pd nanocatalysts and IL within bilayer carbide-derived carbon (CDC) to obtain Pd@IL/CDC(FA) with high metal loading up to 69.7%. Thereby, the featured active phases in Pd@IL/CDC(FA) impart potent chemical nanoconfinement to defend metals from dissolution and aggregation, boost mass and electron transfer, and mediate oxidation states and adsorption/desorption of metal Pd in the ORR. Instead of deactivation and Ostwald ripening, the catalytic performances of Pd@IL/CDC(FA) are gradually enhanced in an accelerated durability test up to 20 000 cycles. In a Zn-air battery, the Pd@IL/CDC(FA) cathode gives a specific capacity of 812.6 mAh g(Zn)(-1) and a voltage loss of only 41 mV in galvanostatic discharge for 1000 h. The work opens new venues in controllably preparing high activity and durable electrocatalysts from in-situ generated CDCs.