李彬   Professor

李彬,青岛科技大学材料科学与工程学院,崂山学者三层次教授,博士毕业于复旦大学化学系,师从赵东元院士,博士毕业后在新加坡南洋理工大学继续博士后的研究工作,合作导师陈晓东教授。主要从事新型多孔材料的合成与应用,尤其是在微介孔材料的控制合成、性能调控以及在电催化领域中形成了独特的思想见解,取得了一系列有影响力的研究成果。立项主持国家自然科学基金面上项目2项,主持国家自然科学基金山东省区域创新发...Detials

Boosting the oxygen reduction reaction behaviour of Ru single atoms in porous carbon nanospheres via microscopic coordination environment manipulation

Release time:2024-01-19  Hits:

  • Key Words:ACTIVE-SITES; EFFICIENT; ELECTROCATALYSTS; NANOPARTICLES; NANOTUBES; CATALYSTS; GRAPHENE; ROUTE
  • Abstract:The development of high-performing oxygen reduction reaction (ORR) single atom catalysts (SACs) is the basis for mass production of metal-air batteries and fuel cells. This is also an important means to achieve peak carbon dioxide emis and carbon neutrality. Ru SACs can effectively imped Fenton reactions and significantly enhance resistance to attenuation. However, Ru SACs exhibit inferior ORR activity than TM (transition metal)-NC catalysts and Ru atoms are prone to agglomeration. Herein, we report a simple method for the controllable preparation of Ru SAs in N and S modulated porous carbon nanospheres (Ru-SAs-N/S-PCNSs). S heteroatoms doping can change the charge density of Ru central metal atom, and reduce its binding strength to ORR intermediates, and expedite ORR activity. The porous carbon nanospheres matrix makes Ru SAs active site fully exposed. The onset potential and half-wave potential of Ru-SAs-N/S-PCNSs electrocatalyst is as high as 1.0 V and 0.87 V (vs RHE), which is in the excellent ranks. In addition, the performance of Zn-air battery with Ru-SAs-N/SPCNSs is better than that of Pt/C RuO2. The synthesis method we developed can effectively preclude the agglomeration of Ru metal atoms, and provides a new pathway for the preparation of SACs with high catalytic performance.
  • Volume:615
  • Issue:-
  • Translation or Not:no