Proton exchange membrane water electrolysis(PEMWE)technology is widely recognized as a cornerstone for green hydrogen production,offering high operational current densities exceeding 1.0 A cm^(-2),rapid dynamic respon...Proton exchange membrane water electrolysis(PEMWE)technology is widely recognized as a cornerstone for green hydrogen production,offering high operational current densities exceeding 1.0 A cm^(-2),rapid dynamic response capabilities,and zero-carbon emission characteristics[1].However,the sluggish kinetics of oxygen evolution reaction(OER)at the anode presents a critical bottleneck for large-scale commercial deployment(Fig.1(a)).Despite significant advancements through electronic structure modulation[2]and coordination environment optimization[3],the deprotonation energy barrier of oxygen-containing intermediates and the stability of active sites under acidic conditions remain unresolved challenges.展开更多
Technological exchanges between Spain and China could not only boost bilateral innovation and economic growth but also benefit the EU and the international community.
Conventional proton exchange membrane(PEM)electrolysis technology relies on ultrapure water,as cationic impurities(such as Na^(+),Ca^(2+) and Fe^(3+))can occupy H+transport sites in the membrane[1],leading to a sharp ...Conventional proton exchange membrane(PEM)electrolysis technology relies on ultrapure water,as cationic impurities(such as Na^(+),Ca^(2+) and Fe^(3+))can occupy H+transport sites in the membrane[1],leading to a sharp rise in cathode pH,catalyst deactivation,and membrane degradation[2].This forces the system to be equipped with complex water purification equipment and even necessitates the replacement of membrane electrode assemblies(MEAs),increasing the levelized cost of hydrogen(LCOH)[3].To address this,Tao Ling's group recently proposed a"local pH regulation"strategy in Nature Energy[4].展开更多
In the present study,we employed electrostatic spray technology to fabricate mesoporous microspheres containing sodium hyaluronate(SHMM).This approach aimed to overcome a significant challenge in the formulation devel...In the present study,we employed electrostatic spray technology to fabricate mesoporous microspheres containing sodium hyaluronate(SHMM).This approach aimed to overcome a significant challenge in the formulation development process,specifically addressing the limited water-locking ability inherent to the double-helix structure of sodium hyaluronate(SH).Various parameters were systematically investigated,including the solvent employed,concentrations of SH and poly(ethylene oxide),electrospray flow rate,voltage settings,and needle diameter.Through systematic single-factor testing,we identified the optimal formulation process for generating SH microspheres characterized by favorable morphology and particle size.Additionally,a similar single-factor examination focused on the concentration of the pore-forming agent and the drying temperature,leading to the successful production of mesoporous microspheres with discernible pores.The porosity of the three distinct batches of mesoporous microspheres was consistently measured at 20.30%±1.51%.Moreover,all these microspheres displayed a negative surface potential when suspended in water,affirming their strong capacity to bind with positively charged protein drugs.These findings underscored the feasibility of drug loading through ion exchange in subsequent stages.Notably,the successful preparation of recombinant human interferonα-2b crosslinked mesoporous microspheres(rhIFNα-2b-SHCMM)was achieved,demonstrating both high entrapment efficiency and an enhanced drug loading capacity.展开更多
In recent years,the advancement of efficient and sustainable energy technologies has become a global priority,with particular focus on hydrogen production through water electrolysis[1].Proton exchange membrane water e...In recent years,the advancement of efficient and sustainable energy technologies has become a global priority,with particular focus on hydrogen production through water electrolysis[1].Proton exchange membrane water electrolysis(PEM-WE)technology has gained significant attention due to its ability to effectively couple with renewable power sources,offering high hydrogen production rates,high purity,and excellent scalability[2].However,the oxygen evolution reaction(OER),as a key reaction in the water electrolysis process,remains a bottleneck due to its slow kinetics,low efficiency,and high energy consumption[3].Particularly under acidic conditions,the stability in harsh oxidation environments makes OER reliant on expensive and scarce iridium-based catalysts[4,5].RuO_(2) has been considered as one of the potential alternative materials due to its low cost and high activity.However,its poor intrinsic stability limits its long-term application under practical conditions[6].Therefore,the search for efficient and stable acidic OER electrocatalysts has become a core issue for improving PEM-WE system performance.展开更多
Kazakhstan’s senate chairman applauds the Silk Road Economic Belt’s progress Kazakhstan will continue to promote comprehensive cooperation with China amid the changing world situation,KassymJomart Tokayev,Chairman o...Kazakhstan’s senate chairman applauds the Silk Road Economic Belt’s progress Kazakhstan will continue to promote comprehensive cooperation with China amid the changing world situation,KassymJomart Tokayev,Chairman of the Kazakh Senate,said in Beijing on December 6.展开更多
Chinese medical companies share health benefits with the Belt and Road communityWang Zhao works in Beijing but her work helps people in faraway places.She develops intraocular lenses,to be implanted in the eyes of pat...Chinese medical companies share health benefits with the Belt and Road communityWang Zhao works in Beijing but her work helps people in faraway places.She develops intraocular lenses,to be implanted in the eyes of patients undergoing surgery for cataract or myopia,at EyebrightMedical Technology（Beijing）Co.展开更多
the 2023 Pujiang Innovation Forum Chinese President Xi Jinping sent a congratulatory letter to the 2023 Pujiang Innovation Forum.Themed“Open Innovation Ecosystem:Innovation for Global Connectivity,”the forum opened ...the 2023 Pujiang Innovation Forum Chinese President Xi Jinping sent a congratulatory letter to the 2023 Pujiang Innovation Forum.Themed“Open Innovation Ecosystem:Innovation for Global Connectivity,”the forum opened on September 10 in Shanghai.China will firmly pursue a mutually beneficial and win-win strategy of opening-up,continue to expand high-level opening-up,continue to promote international scientific and technological exchanges and cooperation with a more open mindset and a broader range of measures,build a globally competitive open innovation ecosystem。展开更多
基金financially supported by the Natural Science Foundation of Hunan Province(2023JJ40608,2024JJ6413)the Majoy Project of the Education Department of Hunan Province(24A0610).
文摘Proton exchange membrane water electrolysis(PEMWE)technology is widely recognized as a cornerstone for green hydrogen production,offering high operational current densities exceeding 1.0 A cm^(-2),rapid dynamic response capabilities,and zero-carbon emission characteristics[1].However,the sluggish kinetics of oxygen evolution reaction(OER)at the anode presents a critical bottleneck for large-scale commercial deployment(Fig.1(a)).Despite significant advancements through electronic structure modulation[2]and coordination environment optimization[3],the deprotonation energy barrier of oxygen-containing intermediates and the stability of active sites under acidic conditions remain unresolved challenges.
文摘Technological exchanges between Spain and China could not only boost bilateral innovation and economic growth but also benefit the EU and the international community.
基金the Natural Science Foundation of Guangxi,China(No.2021GXNSFBA220058)the National Natural Science Foundation of China(Nos.22272036, 22362008)Guangxi Normal University Research Grant,China(No.2022TD).
文摘Conventional proton exchange membrane(PEM)electrolysis technology relies on ultrapure water,as cationic impurities(such as Na^(+),Ca^(2+) and Fe^(3+))can occupy H+transport sites in the membrane[1],leading to a sharp rise in cathode pH,catalyst deactivation,and membrane degradation[2].This forces the system to be equipped with complex water purification equipment and even necessitates the replacement of membrane electrode assemblies(MEAs),increasing the levelized cost of hydrogen(LCOH)[3].To address this,Tao Ling's group recently proposed a"local pH regulation"strategy in Nature Energy[4].
基金The 2023 Nantong Social Livelihood Science and Technology Plan2023 Nantong Jianghai Talents Project+3 种基金2022 New Drugs and Platform Enhancement Project of the Yangtze Delta Drug Advanced Research Institute.Zhenjiang Science and Technology Pro ject(Grant No.SH2020048)China Postdoctoral Science Foundation(Gr ant No.2020M681532)Jiangsu Planned Projects for Postdoctoral Research Funds(Grant No.2020Z209)Natural Science Research Pro jects of Universities in Jiangsu Province(Grant No.20KJD350001)。
文摘In the present study,we employed electrostatic spray technology to fabricate mesoporous microspheres containing sodium hyaluronate(SHMM).This approach aimed to overcome a significant challenge in the formulation development process,specifically addressing the limited water-locking ability inherent to the double-helix structure of sodium hyaluronate(SH).Various parameters were systematically investigated,including the solvent employed,concentrations of SH and poly(ethylene oxide),electrospray flow rate,voltage settings,and needle diameter.Through systematic single-factor testing,we identified the optimal formulation process for generating SH microspheres characterized by favorable morphology and particle size.Additionally,a similar single-factor examination focused on the concentration of the pore-forming agent and the drying temperature,leading to the successful production of mesoporous microspheres with discernible pores.The porosity of the three distinct batches of mesoporous microspheres was consistently measured at 20.30%±1.51%.Moreover,all these microspheres displayed a negative surface potential when suspended in water,affirming their strong capacity to bind with positively charged protein drugs.These findings underscored the feasibility of drug loading through ion exchange in subsequent stages.Notably,the successful preparation of recombinant human interferonα-2b crosslinked mesoporous microspheres(rhIFNα-2b-SHCMM)was achieved,demonstrating both high entrapment efficiency and an enhanced drug loading capacity.
文摘In recent years,the advancement of efficient and sustainable energy technologies has become a global priority,with particular focus on hydrogen production through water electrolysis[1].Proton exchange membrane water electrolysis(PEM-WE)technology has gained significant attention due to its ability to effectively couple with renewable power sources,offering high hydrogen production rates,high purity,and excellent scalability[2].However,the oxygen evolution reaction(OER),as a key reaction in the water electrolysis process,remains a bottleneck due to its slow kinetics,low efficiency,and high energy consumption[3].Particularly under acidic conditions,the stability in harsh oxidation environments makes OER reliant on expensive and scarce iridium-based catalysts[4,5].RuO_(2) has been considered as one of the potential alternative materials due to its low cost and high activity.However,its poor intrinsic stability limits its long-term application under practical conditions[6].Therefore,the search for efficient and stable acidic OER electrocatalysts has become a core issue for improving PEM-WE system performance.
文摘Kazakhstan’s senate chairman applauds the Silk Road Economic Belt’s progress Kazakhstan will continue to promote comprehensive cooperation with China amid the changing world situation,KassymJomart Tokayev,Chairman of the Kazakh Senate,said in Beijing on December 6.
文摘Chinese medical companies share health benefits with the Belt and Road communityWang Zhao works in Beijing but her work helps people in faraway places.She develops intraocular lenses,to be implanted in the eyes of patients undergoing surgery for cataract or myopia,at EyebrightMedical Technology（Beijing）Co.
文摘the 2023 Pujiang Innovation Forum Chinese President Xi Jinping sent a congratulatory letter to the 2023 Pujiang Innovation Forum.Themed“Open Innovation Ecosystem:Innovation for Global Connectivity,”the forum opened on September 10 in Shanghai.China will firmly pursue a mutually beneficial and win-win strategy of opening-up,continue to expand high-level opening-up,continue to promote international scientific and technological exchanges and cooperation with a more open mindset and a broader range of measures,build a globally competitive open innovation ecosystem。
