The preparation of bifunctional catalysts for oxygen reduction(ORR)and oxygen evolution(OER)is crucial for Zn-air batteries.Here,we report a La doped CoFe_(2)O_(4) spinel catalyst supported on threedimensional graphen...The preparation of bifunctional catalysts for oxygen reduction(ORR)and oxygen evolution(OER)is crucial for Zn-air batteries.Here,we report a La doped CoFe_(2)O_(4) spinel catalyst supported on threedimensional graphene(3D-G),where La can facilitate electron transfer from Co to Fe,leading to increased electron cloud density in Fe and improved catalytic performance.The redshift of the G peak in the Raman spectra indicates the interaction between theπbond of 3D-G and d orbitals in La_(0.2)CoFe_(1.8)O_(4).La_(0.2)CoFe_(1.8)/3D-G exhibits superior ORR performance(E_(1/2)=0.86 V vs.RHE)and OER performance(E_(j=10)=1.55 V vs.RHE)to CoFe_(2)O_(4)/3D-G(E_(1/2)=0.831 V vs.RHE,E_(j=10)=1.603 V vs.RHE).Furthermore,it demonstrates excellent bifunctional oxygen catalytic performance while maintaining high power density and stability in liquid zinc-air batteries(ZABs)and flexible ZABs(F-ZABs).This work presents a viable strategy for utilizing rare earth element doped spinels to enhance oxygen catalyst and ZABs performance.展开更多
主要介绍了 Ti 合金在核燃料后处理设备中的应用研究进展。开发 Ti 合金替代超低碳不锈钢作核燃料后处理设备用材料已成为后处理设备用材料的发展方向。目前 Ti-5Ta 钛合金已在日本东海村后处理厂进行了中试运行,它的综合性能评价较好,...主要介绍了 Ti 合金在核燃料后处理设备中的应用研究进展。开发 Ti 合金替代超低碳不锈钢作核燃料后处理设备用材料已成为后处理设备用材料的发展方向。目前 Ti-5Ta 钛合金已在日本东海村后处理厂进行了中试运行,它的综合性能评价较好,在后处理环境中应用也最具前景。印度对其开发的 Ti-5%Ta-1.8%Nb 钛合金进行了腐蚀性能研究,结果表明它比普通低碳不锈钢和硝酸级不锈钢具有更好的耐蚀性。展开更多
基金financially supported by the National Natural Science Foundation of China(22172093 and 21776167)the Natural Science Foundation of Shandong Province,China(ZR2023MB061).
文摘The preparation of bifunctional catalysts for oxygen reduction(ORR)and oxygen evolution(OER)is crucial for Zn-air batteries.Here,we report a La doped CoFe_(2)O_(4) spinel catalyst supported on threedimensional graphene(3D-G),where La can facilitate electron transfer from Co to Fe,leading to increased electron cloud density in Fe and improved catalytic performance.The redshift of the G peak in the Raman spectra indicates the interaction between theπbond of 3D-G and d orbitals in La_(0.2)CoFe_(1.8)O_(4).La_(0.2)CoFe_(1.8)/3D-G exhibits superior ORR performance(E_(1/2)=0.86 V vs.RHE)and OER performance(E_(j=10)=1.55 V vs.RHE)to CoFe_(2)O_(4)/3D-G(E_(1/2)=0.831 V vs.RHE,E_(j=10)=1.603 V vs.RHE).Furthermore,it demonstrates excellent bifunctional oxygen catalytic performance while maintaining high power density and stability in liquid zinc-air batteries(ZABs)and flexible ZABs(F-ZABs).This work presents a viable strategy for utilizing rare earth element doped spinels to enhance oxygen catalyst and ZABs performance.
文摘主要介绍了 Ti 合金在核燃料后处理设备中的应用研究进展。开发 Ti 合金替代超低碳不锈钢作核燃料后处理设备用材料已成为后处理设备用材料的发展方向。目前 Ti-5Ta 钛合金已在日本东海村后处理厂进行了中试运行,它的综合性能评价较好,在后处理环境中应用也最具前景。印度对其开发的 Ti-5%Ta-1.8%Nb 钛合金进行了腐蚀性能研究,结果表明它比普通低碳不锈钢和硝酸级不锈钢具有更好的耐蚀性。
