A non-precious metal catalyst CoMe]C for the oxygen reduction reaction is prepared by heat-treating a mechanical mixture of carbon black, melamine and cobalt chloride at 600 under nitrogen atmosphere for 2 h. The cata...A non-precious metal catalyst CoMe]C for the oxygen reduction reaction is prepared by heat-treating a mechanical mixture of carbon black, melamine and cobalt chloride at 600 under nitrogen atmosphere for 2 h. The catalytic activity of CoMe/C is characterized by the electrochemical linear sweep voltammetry technique. The onset reduction potential of the catalyst is 0.55 V （vs. SCE） at a scanning rate of 5 mV/s in 0.5 mol/L H2SO4 solution. The formation of the ORR activity sites of CoMe/C is facilitated by metallic β- cobalt.展开更多
A non-precious metal catalyst MnHMTA/C to oxygen reduction reaction was prepared by py-rolyzing a precursor from manganese chloride,hexamethylenetetramine and acetylene black in nitrogen gas atmosphere.The effect of h...A non-precious metal catalyst MnHMTA/C to oxygen reduction reaction was prepared by py-rolyzing a precursor from manganese chloride,hexamethylenetetramine and acetylene black in nitrogen gas atmosphere.The effect of heat treatment temperature and flowing of nitrogen gas were investigated.A catalyst with the highest activity can be obtained at 700℃.Mn(Ⅱ)ion was changed to MnO in heat treatment,which improved the catalytic activity of the catalyst.Hexamethylenetetramine takes part in the formation of active site of the catalyst as its decomposed gases.The flowing of protective gas takes the decomposed gases out of the tube furnace and brings negative effect on the catalytic activity of the MnHMTA/C catalyst.展开更多
Dear Editor,Soybean(Glycine max)is a critical crop worldwide,renowned as a major source of edible oil and protein.It was domesticated approximately 5000-9000 years ago in China,between latitudes 32°N and 40°...Dear Editor,Soybean(Glycine max)is a critical crop worldwide,renowned as a major source of edible oil and protein.It was domesticated approximately 5000-9000 years ago in China,between latitudes 32°N and 40°N,from its wild progenitor,Glycine soja.In recent years,numerous genome assemblies for both cultivated and wild soybeans have been published,with cultivated soybean genomes even achieving telomere-to-telomere(T2T)completeness(Zhang et al.,2023a,2023b;Wang et al.,2023;Huang et al.,2024).展开更多
基金supported by the Fundamental Research Funds for the Central Universities (No. CDJXS12220002)the Specialized Research Fund for the Doctoral Program of Sichuan University of Science and Engineering (No. 2012RC16)+2 种基金the Opening Project of Key Laboratory of Green Catalysis of Sichuan Institutes of High Education (No. LYJ1206)the National Undergraduate Innovation Training Project (No. 1110611046)Discipline Construction Project of Sichuan University of Science and Engineering
文摘A non-precious metal catalyst CoMe]C for the oxygen reduction reaction is prepared by heat-treating a mechanical mixture of carbon black, melamine and cobalt chloride at 600 under nitrogen atmosphere for 2 h. The catalytic activity of CoMe/C is characterized by the electrochemical linear sweep voltammetry technique. The onset reduction potential of the catalyst is 0.55 V （vs. SCE） at a scanning rate of 5 mV/s in 0.5 mol/L H2SO4 solution. The formation of the ORR activity sites of CoMe/C is facilitated by metallic β- cobalt.
文摘A non-precious metal catalyst MnHMTA/C to oxygen reduction reaction was prepared by py-rolyzing a precursor from manganese chloride,hexamethylenetetramine and acetylene black in nitrogen gas atmosphere.The effect of heat treatment temperature and flowing of nitrogen gas were investigated.A catalyst with the highest activity can be obtained at 700℃.Mn(Ⅱ)ion was changed to MnO in heat treatment,which improved the catalytic activity of the catalyst.Hexamethylenetetramine takes part in the formation of active site of the catalyst as its decomposed gases.The flowing of protective gas takes the decomposed gases out of the tube furnace and brings negative effect on the catalytic activity of the MnHMTA/C catalyst.
基金supported by the Natural Science Foundation of Shandong Province for Young Scholars(ZR2023QC153)the Key R&D Program of Shandong Province(2021LZGC025,2022LZGC022,and 2023LZGC001)+1 种基金the National Natural Science Foundation of China(32201736)the Agricultural Science and Technology Innovation Project of SAAS(CXGC2023F13 and CXGC2023C02)。
文摘Dear Editor,Soybean(Glycine max)is a critical crop worldwide,renowned as a major source of edible oil and protein.It was domesticated approximately 5000-9000 years ago in China,between latitudes 32°N and 40°N,from its wild progenitor,Glycine soja.In recent years,numerous genome assemblies for both cultivated and wild soybeans have been published,with cultivated soybean genomes even achieving telomere-to-telomere(T2T)completeness(Zhang et al.,2023a,2023b;Wang et al.,2023;Huang et al.,2024).
