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Enhanced bifunctional oxygen electrochemical catalytic performance using La-doped CoFe_(2)O_(4)spinel supported by 3D-G for Zn-air batteries
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作者 Yinggang Sun Tingwei Zhang +5 位作者 Peng Sun Jigang Wang Wenjie Duan Yanqiong Zhuang Likai Wang Zhongfang Li 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2024年第7期778-788,共11页
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
关键词 Zn-air batteries Electrocatalysts La_(0.2)CoFe_(1.8)/3D-G Electron pump Bifunctional oxygen catalytic performance
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Ultralow charge-discharge voltage gap of 0.05 V in sunlight-responsive neutral aqueous Zn-air battery
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作者 Zhimin Niu Yan Gao +8 位作者 Tianhui Wu Fei Zhang Ran Zhao Zijia Chen Yiming Yuan Tifeng Jiao Jianmin Gu Li Lu Desong Wang 《Carbon Energy》 SCIE EI CAS CSCD 2024年第9期172-183,共12页
Rechargeable neutral aqueous zinc-air batteries(ZABs)are a promising type of energy storage device with longer operating life and less corrosiveness compared with conventional alkaline ZABs.However,the neutral ZABs no... Rechargeable neutral aqueous zinc-air batteries(ZABs)are a promising type of energy storage device with longer operating life and less corrosiveness compared with conventional alkaline ZABs.However,the neutral ZABs normally possess poor oxygen evolution reactions(OERs)and oxygen reduction reactions performance,resulting in a large charge–discharge voltage gap and low round-trip efficiency.Herein,we demonstrate a sunlight-assisted strategy for achieving an ultralow voltage gap of 0.05 V in neutral ZABs by using the FeOOH-decorated BiVO4(Fe-BiVO4)as an oxygen catalyst.Under sunlight,the electrons move from the valence band(VB)of Fe-BiVO_(4) to the conduction band producing holes in VB to promote the OER process and hence reduce the overpotential.Meanwhile,the photopotential generated by the Fe-BiVO_(4) compensates a part of the charging potential of neutral ZABs.Accordingly,the energy loss of the battery could be compensated via solar energy,leading to a record-low gap of 0.05 V between the charge and discharge voltage with a high round-trip efficiency of 94%.This work offers a simple but efficient pathway for solar-energy utilization in storage devices,further guiding the design of high energy efficiency of neutral aqueous ZABs. 展开更多
关键词 neutral ZABs oxygen catalytic reactions PHOTOCATALYSIS round-trip efficiency solar energy
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A POLAROGRAPHIC CATALYTIC WAVE OF OXYGEN INDUCED BY DIPHENYLAMINE COMPOUNDS
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作者 Jun Feng SONG Wei GUO Yin Hua HU Department of Chemistry,Northwest University,Xi’an 710069 《Chinese Chemical Letters》 SCIE CAS CSCD 1992年第1期67-68,共2页
It is reported in this paper a polarographic catalytic double wave of oxygen reduction caused by diphenylamine compounds(diphs).The electrochemical process of the wave includes the polarographic generation of the supe... It is reported in this paper a polarographic catalytic double wave of oxygen reduction caused by diphenylamine compounds(diphs).The electrochemical process of the wave includes the polarographic generation of the superoxide anion O_2^- and the dismutation of O_2^- catalyzed by diphs with redox pseudoreversibility. 展开更多
关键词 A POLAROGRAPHIC catalytic WAVE OF OXYGEN INDUCED BY DIPHENYLAMINE COMPOUNDS
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Remarkable promotion effect of trace sulfation on OMS-2nanorod catalysts for the catalytic combustion of ethanol 被引量:9
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作者 Jie Zhang Changbin Zhang Hong He 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第9期69-75,共7页
OMS-2 nanorod catalysts were synthesized by a hydrothermal redox reaction method using Mn SO4(OMS-2-SO4) and Mn(CH3COO)2(OMS-2-AC) as precursors. SO4^2--doped OMS-2-AC catalysts with different SO4^2-concentratio... OMS-2 nanorod catalysts were synthesized by a hydrothermal redox reaction method using Mn SO4(OMS-2-SO4) and Mn(CH3COO)2(OMS-2-AC) as precursors. SO4^2--doped OMS-2-AC catalysts with different SO4^2-concentrations were prepared next by adding(NH4)2SO4solution into OMS-2-AC samples to investigate the effect of the anion SO4^2-on the OMS-2-AC catalyst. All catalysts were then tested for the catalytic oxidation of ethanol. The OMS-2-SO4 catalyst synthesized demonstrated much better activity than OMS-2-AC. The SO4^2-doping greatly influenced the activity of the OMS-2-AC catalyst, with a dramatic promotion of activity for suitable concentration of SO4^2-(SO4/catalyst = 0.5% W/W). The samples were characterized by X-ray diffraction(XRD), field emission scanning electron microscopy(FE-SEM), transmission electron microscopy(TEM), X-ray photoelectron spectroscopy(XPS),inductively coupled plasma optical emission spectroscopy(ICP-OES), NH3-TPD and H2-TPR techniques. The results showed that the presence of a suitable amount of SO4^2-species in the OMS-2-AC catalyst could decrease the Mn–O bond strength and also enhance the lattice oxygen and acid site concentrations, which then effectively promoted the catalytic activity of OMS-2-AC toward ethanol oxidation. Thus it was confirmed that the better catalytic performance of OMS-2-SO4 compared to OMS-2-AC is due to the presence of some residual SO4^2-species in OMS-2-SO4 samples. 展开更多
关键词 Manganese oxide Octahedral molecular sieves(OMS-2) catalytic oxidation VOCs Lattice oxygen
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Oxygen reduction on polycobaltprotoporphyrin film Ⅰ.Catalytic activity and stability of polycobaltprotoporphyrin film toward oxygen reduction
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作者 WANG Bao-Chen XIAO Shao-Rong Changchun Institute of Applied Chemistry,Academia Sinica,Changchun 《Acta Chimica Sinica English Edition》 SCIE CAS CSCD 1989年第5期385-392,共1页
The catalytic activity of polycobaltprotoporphyrin(PCoPP)was compared with adsorbed cobaltprotoporphyrin monolayer.The results have shown that PCoPP film shows higher catalytic activity and stability than monolayer on... The catalytic activity of polycobaltprotoporphyrin(PCoPP)was compared with adsorbed cobaltprotoporphyrin monolayer.The results have shown that PCoPP film shows higher catalytic activity and stability than monolayer on glass carbon electrode in both alkaline and acid solution. Catalytic activity of PCoPP goes through a maximum with increase of film thickness.A model was proposed to explain such dependence.The effect of film thickness and solution pH on the stability of PCoPP film was studied. 展开更多
关键词 CO RATE catalytic activity and stability of polycobaltprotoporphyrin film toward oxygen reduction Oxygen reduction on polycobaltprotoporphyrin film
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A highly accessible copper single-atom catalyst for wound antibacterial application 被引量:1
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作者 Yue Zhao Yunpeng Yu +8 位作者 Feng Gao Zhiyuan Wang Wenxing Chen Cai Chen Jia Yang Yancai Yao Junyi Du Chao Zhao Yuen Wu 《Nano Research》 SCIE EI CSCD 2021年第12期4808-4813,共6页
Bacterial infection arised from multipathogenic bacteria is a tricky issue that attracts worldwide attentions.In this paper,a highly accessible copper single-atom catalyst(Cu SAC)supported by biocompatible N-doped mes... Bacterial infection arised from multipathogenic bacteria is a tricky issue that attracts worldwide attentions.In this paper,a highly accessible copper single-atom catalyst(Cu SAC)supported by biocompatible N-doped mesoporous carbon nanospheres was synthesized with the emulsion-template method.The tightly anchored copper single-atom of the catalyst could effectively transform O_(2) into O_(2)−•under ambient conditions by the ultra-large pore size(~23.80 nm)and small particle size(~97.71 nm).Due to multiple synergistically oxidative damages to biomolecules,the Cu SAC could be employed to eliminate different bacteria in vitro without the generation of multidrug resistance(MDR).Moreover,the Cu SAC could also promote wound healing in vivo by eradicating the propagation of bacteria at wound.It is envisioned that the Cu SAC with superior antibacterial performance could be applied in the treatment of related bacterial infection in future. 展开更多
关键词 copper single-atom catalyst mesoporous carbon nanospheres catalytic transformation of oxygen oxidative stress bacterial infection healing
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