The universality of improved CO2 fixing upon the addition of mixed electron donors(MEDs)composed of Na2 S,NO2-,and S2O32-to non-photosynthetic microbial communities(NPMCs)obtained from 12 locations in four oceans ...The universality of improved CO2 fixing upon the addition of mixed electron donors(MEDs)composed of Na2 S,NO2-,and S2O32-to non-photosynthetic microbial communities(NPMCs)obtained from 12 locations in four oceans of the world was validated. The CO2 fixing efficiencies of NPMCs were universally enhanced by MED compared with those obtained using H2 alone as electron donor,with average increase of about 276%. An increase in microbial inoculation concentration could increase the net amount of CO2 fixing to853.34 mg/L in the presence of MED. NO2-and S2O32-may play the roles of both electron acceptor and electron donor under aerobic conditions,which may improve the energy utilization efficiency of NPMC and enhance the CO2 fixation efficiency. The sequence determination of 16 S ribosomal deoxyribonucleic acid(rDNA) from 150 bacteria of NPMC showed that more than 50% of the bacteria were symbiotic and there were many heterotrophic bacteria such as Vibrio natriegens. These results indicate that NPMC acts as a symbiotic CO2 fixing system. The interaction between autotrophic and heterotrophic bacteria may be a crucial factor supporting ladder utilization and recycling of energy/carbon source.展开更多
Understanding the atomic and electronic changes of active sites promotes the whole new sight into electrochemical carbon dioxide reduction reaction(CO_(2)RR),which provides a feasible strategy to achieve carbon neutra...Understanding the atomic and electronic changes of active sites promotes the whole new sight into electrochemical carbon dioxide reduction reaction(CO_(2)RR),which provides a feasible strategy to achieve carbon neutrality.Here we employ operando high-energy resolution fluorescence-detected Xray absorption spectroscopy(HERFD-XAS)to track the structural evolution of Ni(II)phthalocyanine(NiPc),considered as the model catalysts with uniform Ni-N_(4)-C_(8) moiety,during the CO_(2)RR.The HERFD-XAS method is in favor of elucidating the interaction of the reactant/catalyst interface from the atomic electronic structure dimension,facilitating the establishment of the catalytic mechanism and the dynamic structure changes.Based on operando measurement,surface sensitive difference spectra(△μ)and spectroscopy simulation,the interfacial interactions between the active sites of NiPc and reactants are monitored and the Ni species gradually reduced by increasing the applied potential is discovered.HERFD-XAS method offers an advanced and powerful tool for elucidating the complex catalytic mechanism in further various systems.展开更多
Increasing CO_(2) levels in the atmosphere due to the consumption of large amounts of fossil fuels is exacerbating global climate change,which seriously threatens sustainable human development.As a responsible and res...Increasing CO_(2) levels in the atmosphere due to the consumption of large amounts of fossil fuels is exacerbating global climate change,which seriously threatens sustainable human development.As a responsible and respectable country,China has announced remarkable goals of reaching a carbon emission peak and achieving carbon neutrality,which are challenging missions with enormous contributions to the world.As a strategic support,disruptive and transformative energy technologies are urgently required to develop new green and low-carbon energy industries.Renewable energy sources such as wind and sun,which can generate zero-carbon electric power,have been rapidly developed in recent years.展开更多
基金supported by the National Natural Science Foundation of China (Nos.21177093,21307093)the National High Technology Research and Development Program of China (No.2012AA050101)+3 种基金the Research Fund for the Doctoral Program of Higher Education of China (No.20130072110025)China Postdoctoral Science Foundation (Nos.2013M531220,121656)the State Key Laboratory of Pollution Control and Resource Reuse Foundation (No.PCRRY12002)the Collaborative Innovation Center for Regional Environmental Quality
文摘The universality of improved CO2 fixing upon the addition of mixed electron donors(MEDs)composed of Na2 S,NO2-,and S2O32-to non-photosynthetic microbial communities(NPMCs)obtained from 12 locations in four oceans of the world was validated. The CO2 fixing efficiencies of NPMCs were universally enhanced by MED compared with those obtained using H2 alone as electron donor,with average increase of about 276%. An increase in microbial inoculation concentration could increase the net amount of CO2 fixing to853.34 mg/L in the presence of MED. NO2-and S2O32-may play the roles of both electron acceptor and electron donor under aerobic conditions,which may improve the energy utilization efficiency of NPMC and enhance the CO2 fixation efficiency. The sequence determination of 16 S ribosomal deoxyribonucleic acid(rDNA) from 150 bacteria of NPMC showed that more than 50% of the bacteria were symbiotic and there were many heterotrophic bacteria such as Vibrio natriegens. These results indicate that NPMC acts as a symbiotic CO2 fixing system. The interaction between autotrophic and heterotrophic bacteria may be a crucial factor supporting ladder utilization and recycling of energy/carbon source.
基金supported by the National Natural Science Foundation of China (U1732267)Shanghai Science and Technology Development Funds (22YF1454500)Photon Science Center for Carbon Neutrality and Low-Carbon Conversion Science and Engineering Center。
文摘Understanding the atomic and electronic changes of active sites promotes the whole new sight into electrochemical carbon dioxide reduction reaction(CO_(2)RR),which provides a feasible strategy to achieve carbon neutrality.Here we employ operando high-energy resolution fluorescence-detected Xray absorption spectroscopy(HERFD-XAS)to track the structural evolution of Ni(II)phthalocyanine(NiPc),considered as the model catalysts with uniform Ni-N_(4)-C_(8) moiety,during the CO_(2)RR.The HERFD-XAS method is in favor of elucidating the interaction of the reactant/catalyst interface from the atomic electronic structure dimension,facilitating the establishment of the catalytic mechanism and the dynamic structure changes.Based on operando measurement,surface sensitive difference spectra(△μ)and spectroscopy simulation,the interfacial interactions between the active sites of NiPc and reactants are monitored and the Ni species gradually reduced by increasing the applied potential is discovered.HERFD-XAS method offers an advanced and powerful tool for elucidating the complex catalytic mechanism in further various systems.
基金supported by the National Natural Science Foundation of China(Nos.91745114 and 21802160)the“Transformational Technologies for Clean Energy and Demonstration,”the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA 21000000)+3 种基金Hundred Talents Program of the Chinese Academy of Sciences(No.2060299)Youth Innovation Promotion Association of the Chinese Academy of Sciences(No.E224301401)Shanghai Sailing Program(No.18YF1425700)Shanghai Functional Platform for Innovation Low-Carbon Technology,and the Major Project of the Science and Technology Department of Inner Mongolia(No.2021ZD0020).
文摘Increasing CO_(2) levels in the atmosphere due to the consumption of large amounts of fossil fuels is exacerbating global climate change,which seriously threatens sustainable human development.As a responsible and respectable country,China has announced remarkable goals of reaching a carbon emission peak and achieving carbon neutrality,which are challenging missions with enormous contributions to the world.As a strategic support,disruptive and transformative energy technologies are urgently required to develop new green and low-carbon energy industries.Renewable energy sources such as wind and sun,which can generate zero-carbon electric power,have been rapidly developed in recent years.