Chinese Journal of Catalysis ›› 2023, Vol. 46: 36-47.DOI: 10.1016/S1872-2067(22)64198-6

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Surface-enriched ultrafine Pt nanoparticles coupled with defective CoP as efficient trifunctional electrocatalyst for overall water splitting and flexible Zn-air battery

Zexing Wua, Yuxiao Gaoa, Zixuan Wanga, Weiping Xiaoc, Xinping Wanga, Bin Lid,*(), Zhenjiang Lid, Xiaobin Liub, Tianyi Mae, Lei Wanga,b,*()   

  1. aKey Laboratory of Eco-chemical Engineering, Ministry of Education, International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
    bShandong Engineering Research Center for Marine Environment Corrosion and Safety Protection, College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
    cCollege of Science, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
    dSchool of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao 266042, Shandong, China
    eSchool of Science, STEM College, RMIT University, Melbourne, Australia
  • Received:2022-09-06 Accepted:2022-11-23 Online:2023-03-18 Published:2023-02-21
  • Contact: *E-mail: (B. Li), (L. Wang)
  • Supported by:
    National Natural Science Foundation of China(22002068);National Natural Science Foundation of China(21971132);National Natural Science Foundation of China(52272222);National Natural Science Foundation of China(52072197);The China Postdoctoral Science Foundation(2021M691700);The Youth Innovation and Technology Foundation of Shandong Higher Education Institutions, China(2019KJC004);Outstanding Youth Foundation of Shandong Province, China(ZR2019JQ14);Taishan Scholar Young Talent Program(tsqn201909114);Major Scientific and Technological Innovation Project(2019JZZY020405);Major Basic Research Program of Natural Science Foundation of Shandong Province(ZR2020ZD09);The Natural Science Foundation of Shandong Province of China(ZR2019BB002);The Natural Science Foundation of Shandong Province of China(ZR2018BB031);Talent Foundation funded by Province and Ministry Co-construction Collaborative Innovation Center of Eco-chemical Engineering(STHGYX2202);The Postdoctoral Innovation Project of Shandong Province


Developing multifunctional electrocatalysts toward energy-related reactions could reduce the cost and improve the utilization efficiency of raw materials. Herein, defective CoP decorated with ultrafine Pt nanoparticles (Pt/d-CoP/NPC) with multifunctional electrocatalytic performances is prepared via facile pyrolysis and following chemical reduction process. The as-synthesized Pt/d-CoP/NPC owns high half-wave potential of 0.82 V for oxygen reduction reaction with excellent stability in 0.1 mol/L KOH. Density functional theory calculations demonstrate that the adsorption energy of *OO at Pt/d-CoP/NPC is stronger compared to Pt, yielding higher catalytic activity for ORR. Moreover, the resultant electrocatalyst possesses excellent catalytic activities with low overpotentials toward hydrogen evolution reaction (33 mV in 1 mol/L KOH, 6 mV in 0.5 mol/L H2SO4 and 70 mV in 1 mol/L PBS) and oxygen evolution reaction (320 mV) at 10 mA/cm2. Water-splitting and rechargeable Zn-air batteries assembled with the as-synthesized Pt/d-CoP/NPC as electrodes exhibit outstanding activity and long-range stability. Remarkably, sustainable energies and homemade Zn-air battery can efficiently drive the Pt/d-CoP/NPC electrolyzer with sumless hydrogen bubbles generated, verifying the potential applications for renewable energy storage.

Key words: Trifunctional electrocatalyst, Hydrogen/oxygen evolution reaction, Oxygen reduction reaction, Flexible Zn-air battery, CoP