The development of efficient oxygen reduction reaction(ORR)electrocatalysts that utilize seawater as an electrolyte is crucial for harnessing marine resources and advancing the application of zinc-air batteries(ZABs)....The development of efficient oxygen reduction reaction(ORR)electrocatalysts that utilize seawater as an electrolyte is crucial for harnessing marine resources and advancing the application of zinc-air batteries(ZABs).Here,Er_(2)O_(3-)Pt electrocatalysts enriched oxygen vacancies were constructed by a one-step microwave method.Theoretical calculations indicate that the unique 4f orbitals of Er,in conjunction with the Pt 5d and O 2p orbitals,allow the 4f electrons to demonstrate a degree of mobility.This behavior provides flexible electronic states and optimizes the binding strength of oxygen intermediates in the ORR.In addition,quasi in-situ characterization has proven that the addition of Er and the mediation of the oxygen vacancies have enriched the electrons at Pt,effectively reducing the adsorption of Cl-and preventing the poisoning of the active site of Pt.As a result,Er_(2)O_(3-)Pt with half-wave potentials(E_(1/2))of 0.85 and 0.67 V in alkaline seawater and pure seawater,respectively,was used as a cathodic catalyst in alkaline seawater-based ZABs to obtain a maximum power density of 184.6 mW·cm^(-2)and remarkable stability in pure seawater.展开更多
基金the National Natural Science Foundation of China(Nos.52072197,52174283,22301156)Key R.&D.,the Natural Science Foundation of Shandong Province(No.ZR2024QB012)+1 种基金the Qingdao Natural Science Foundation(24-4-4-zrjj-16-jch)Shandong Province“Double-Hundred Talent Plan”(No.WST2020003).
文摘The development of efficient oxygen reduction reaction(ORR)electrocatalysts that utilize seawater as an electrolyte is crucial for harnessing marine resources and advancing the application of zinc-air batteries(ZABs).Here,Er_(2)O_(3-)Pt electrocatalysts enriched oxygen vacancies were constructed by a one-step microwave method.Theoretical calculations indicate that the unique 4f orbitals of Er,in conjunction with the Pt 5d and O 2p orbitals,allow the 4f electrons to demonstrate a degree of mobility.This behavior provides flexible electronic states and optimizes the binding strength of oxygen intermediates in the ORR.In addition,quasi in-situ characterization has proven that the addition of Er and the mediation of the oxygen vacancies have enriched the electrons at Pt,effectively reducing the adsorption of Cl-and preventing the poisoning of the active site of Pt.As a result,Er_(2)O_(3-)Pt with half-wave potentials(E_(1/2))of 0.85 and 0.67 V in alkaline seawater and pure seawater,respectively,was used as a cathodic catalyst in alkaline seawater-based ZABs to obtain a maximum power density of 184.6 mW·cm^(-2)and remarkable stability in pure seawater.
