Electronic and lattice strain dual tailoring for boosting Pd electrocatalysis in oxygen reduction reaction
Qing Zeng,
Danye Liu,
Hui Liu,
Penglei Cui,
Chaoquan Hu,
Dong Chen,
Lin Xu,
Xiang Wu,
Jun Yang
Affiliations
Qing Zeng
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
Danye Liu
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China
Hui Liu
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211100 Jiangsu, China
Penglei Cui
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Chaoquan Hu
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211100 Jiangsu, China
Dong Chen
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211100 Jiangsu, China; Corresponding author
Lin Xu
School of Chemistry and Materials Science, Jiangsu Key Laboratory of New Power Batteries, Nanjing Normal University, Nanjing 210023, China; Corresponding author
Xiang Wu
School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, China
Jun Yang
State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, No. 19A Yuquan Road, Beijing 100049, China; Nanjing IPE Institute of Green Manufacturing Industry, Nanjing 211100 Jiangsu, China; Corresponding author
Summary: Deliberately optimizing the d-band position of an active component via electronic and lattice strain tuning is an effective way to boost its catalytic performance. We herein demonstrate this concept by constructing core-shell Au@NiPd nanoparticles with NiPd alloy shells of only three atomic layers through combining an Au catalysis with the galvanic replacement reaction. The Au core with larger electronegativity modulates the Pd electronic configuration, while the Ni atoms alloyed in the ultrathin shells neutralize the lattice stretching in Pd shells exerted by Au cores, equipping the active Pd metal with a favorable d-band position for electrochemical oxygen reduction reaction in an alkaline medium, for which core-shell Au@NiPd nanoparticles with a Ni/Pd atomic ratio of 3/7 exhibit a half-wave potential of 0.92 V, specific activity of 3.7 mA cm−2, and mass activity of 0.65 A mg−1 at 0.9 V, much better than most of the recently reported Pd-even Pt-based electrocatalysts.
