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Progress has been made in the research of hydrogen production
The original intention of developing hydrogen energy is to produce green hydrogen through electrolysis of water based on renewable energy, but the high amount of precious metal catalyst used is one of the main reasons for the high cost of proton exchange membrane electrolysis of water for hydrogen production.
Yang Hui's team of the Chinese Academy of Sciences Shanghai Institute of Advanced Research and Dai Liming's project team of Case Western Reserve University in the United States have made new progress in the field of hydrogen energy research, developed a new method of spontaneous deposition of platinum clusters driven by carbon defects, and achieved a significant reduction in the consumption of Pt cathode for hydrogen production from electrolytic water. The research results were published in J Am. Chem. Soc., 2020, 142, 12, 5594-5601, the first author of the paper is Dr. Cheng Qingqing from Shanghai Institute of Advanced Study, with Professor Yang Hui and Dai Liming as corresponding contacts.
Yang Hui's team of the Chinese Academy of Sciences Shanghai Institute of Advanced Research and Dai Liming's project team of Case Western Reserve University in the United States have made new progress in the field of hydrogen energy research, developed a new method of spontaneous deposition of platinum clusters driven by carbon defects, and achieved a significant reduction in the consumption of Pt cathode for hydrogen production from electrolytic water. The research results were published in J Am. Chem. Soc., 2020, 142, 12, 5594-5601, the first author of the paper is Dr. Cheng Qingqing from Shanghai Institute of Advanced Study, with Professor Yang Hui and Dai Liming as corresponding contacts.
In this work, researchers utilized a novel method of carbon defect driven spontaneous deposition to construct Pt atomic level clusters (Pt AC) as highly dispersed, ultra small (<1nm), and stable electrocatalysts for water electrolysis of hydrogen (HER) loaded with defective graphene (Figure 1). Theoretical studies have shown that compared to perfect hexagonal carbon sites, defective carbon sites have lower surface work functions and higher reducing abilities, thereby preferentially triggering spontaneous deposition of Pt ions at the defect sites. The stronger binding ability between carbon defects and Pt effectively limits the migration of spontaneously reduced Pt atoms, ensuring the formation and stability of ultra small Pt AC. Shanghai Light Source Synchrotron Radiation further confirmed the strong electronic interaction between Pt AC and carbon defects, endowing it with a unique electronic structure distinct from traditional Pt nanoparticles.
Pt AC exhibits excellent HER electrocatalytic performance, and compared with traditional Pt/C catalysts, its mass specific activity, Pt atom utilization efficiency, and stability have been significantly improved. The assembled proton exchange membrane water electrolysis device achieves ampere level hydrogen production current while reducing the cathode Pt dosage to about 1/10, and exhibits excellent stability. The progress of this project will have significant scientific and practical implications for the development of the hydrogen energy field and the realization of a hydrogen economy.
Pt AC exhibits excellent HER electrocatalytic performance, and compared with traditional Pt/C catalysts, its mass specific activity, Pt atom utilization efficiency, and stability have been significantly improved. The assembled proton exchange membrane water electrolysis device achieves ampere level hydrogen production current while reducing the cathode Pt dosage to about 1/10, and exhibits excellent stability. The progress of this project will have significant scientific and practical implications for the development of the hydrogen energy field and the realization of a hydrogen economy.
This research has received funding from the National Key Research and Development Program, the National Natural Science Foundation of China, and the Strategic Leading Science and Technology Program of the Chinese Academy of Sciences.