Ultra-stable Pt_(5)La intermetallic compound towards highly efficient oxygen reduction reaction  

作　　者：Siyuan Zhu Liting Yang Jingsen Bai Yuyi Chu Jie Liu Zhao Jin Changpeng Liu Junjie Ge Wei Xing 

机构地区：[1]State Key Laboratory of Electroanalytical Chemistry,Laboratory of Advanced Power Sources,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun 130022,China [2]School of Applied Chemistry and Engineering,University of Science and Technology of China,University of Science and Technology of China(USTC),Hefei 230026,China [3]Dalian National Laboratory for Clean Energy,Chinese Academy of Sciences,Dalian 116023,China

出　　处：《Nano Research》2023年第2期2035-2040,共6页纳米研究（英文版）

基　　金：supported by National Key R&D Program of China(No.2021YFA1501101);the National Natural Science Foundation of China(Nos.21875243,21673220,21733004,and U1601211);the Jilin Province Science and Technology Development Program(Nos.20190201270JC,20180101030JC,and 20200201001JC);Dalian National Laboratory for Clean Energy(DNL),Chinese Academy of Sciences(CAS),and the Research Innovation Fund(No.DNL202010).

摘　　要：Designing feasible electrocatalysts towards oxygen reduction reaction(ORR)requires advancement in both activity and stability,where attaining high stability is of extreme importance as the catalysts are expected to work efficiently under frequent start-up/shut down circumstances for at least several thousand hours.Alloying platinum with early transition metals(i.e.,Pt–La alloy)is revealed as efficient catalysts construction strategy to potentially satisfy these demands.Here we report a Pt5La intermetallic compound synthesized by a novel and facile strategy.Due to the strong electronic interactions between Pt and La,the resultant Pt5La alloy catalyst exhibits enhanced activity with half wave of 0.92 V and mass activity of 0.49 A·mgPt^(−1),which strictly follows the 4e transfer pathway.More importantly,the catalyst performs superior stability during 30,000 cycles of accelerated stressed test(AST)with mass activity retention of 93.9%.This study provides new opportunities for future applications of Pt-rare earth metal alloy with excellent electrocatalytic properties.

关 键 词：oxygen reduction reaction intermetallic compound rare earth metal ELECTROCATALYSIS 

分 类 号：O643.36[理学—物理化学]