Bismuth-based catalysts are highly promising for the electrochemical carbon dioxide reduction reaction(eCO_(2)RR)to formate product.However,achieving high activity and selectivity towards formate and ensuring long-ter...Bismuth-based catalysts are highly promising for the electrochemical carbon dioxide reduction reaction(eCO_(2)RR)to formate product.However,achieving high activity and selectivity towards formate and ensuring long-term stability remains challenging.This work reports the oxygen plasma inducing strategy to construct the abundant grain boundaries of Bi/BiO_x on ultrathin two-dimensional Bi nanosheets.The oxygen plasma-treated Bi nanosheet(OP-Bi)exhibits over 90%Faradaic efficiency(FE)for formate at a wide potential range from-0.5 to-1.1 V,and maintains a great stability catalytic performance without significant decay over 30 h in flow cell.Moreover,membrane electrode assembly(MEA)device with OPBi as catalyst sustains the robust current density of 100 mA cm^(-2)over 50 h,maintaining a formate FE above 90%.In addition,rechargeable Zn-CO_(2)battery presents the peak power density of1.22 mW cm^(-2)with OP-Bi as bifunctional catalyst.The mechanism experiments demonstrate that the high-density grain boundaries of OP-Bi provide more exposed active sites,faster electron transfer capacity,and the stronger intrinsic activity of Bi atoms.In situ spectroscopy and theo retical calculations further elucidate that the unsaturated Bi coordination atoms between the grain boundaries can effectively activate CO_(2)molecules through elongating the C-O bond,and reducing the formation energy barrier of the key intermediate(^(*)OCOH),thereby enhancing the catalytic performance of eCO_(2)RR to formate product.展开更多
Amyloidosis is a multisystem disease that is characterized by deposition of fibrils in extracellular tissue,which mainly involves the kidney,heart,and autonomic nervous system.Two types of amyloidosis typically infilt...Amyloidosis is a multisystem disease that is characterized by deposition of fibrils in extracellular tissue,which mainly involves the kidney,heart,and autonomic nervous system.Two types of amyloidosis typically infiltrate the heart,including immunoglobulin light-chain(AL)and amyloid transthyretin(ATTR).ATTR is further subdivided into wild-type ATTR and variant ATTR caused by point mutations in the TTR gene.[1]Wild-type ATTR is considered as not uncommon in older patients with heart failure.Recently,a comprehensive set of consensus recommendations for the suspicion and diagnosis of ATTR was published,with particular focus on the combined application of noninvasive methods.[2]We present here a case of wild-type TTR cardiac amyloidosis(ATTRwt-CA),which was diagnosed by noninvasive modalities,and provide an overview of the recommended diagnostic approach of CA.Furthermore,to the best of our knowledge,this is the first Chinese case of ATTRwt-CA reported to date.展开更多
A novel strategy to synthesize copper-based nanoparticles supported on carbon nitride(C3 N4) was developed by popping of mixture containing C3 N4 and cupric nitrate. Characterizations such as X-ray photoelectron spect...A novel strategy to synthesize copper-based nanoparticles supported on carbon nitride(C3 N4) was developed by popping of mixture containing C3 N4 and cupric nitrate. Characterizations such as X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD) indicate that the structure of g-C3 N4 maintained although a popping process occurred. High resolution transmission electronic microscopy(HRTEM) characterization illustrated that copper-based nanoparticles with diameter of < 1 nm were well distributed on g-C3 N4. This kind of copper catalyst exhibits high catalytic activity and selectivity in arylation of pyrazole, a simple and effect strategy to construct C-N bond in organic chemistry.According to the results of control experiments and characterizations, cuprous oxide should be the catalytic active phase in the supported coperbased catalyst.展开更多
基金supported by the Hainan Province Science and Technology Special Fund(ZDYF2024SHFZ074,ZDYF2024SHFZ072,ZDYF2022SHFZ299)the National Natural Science Foundation of China(22109035,22202053,52164028,52274297,22309037)+4 种基金the Start-up Research Foundation of Hainan University(KYQD(ZR)-20008,20083,20084,21125,23035)the collaborative Innovation Center of Marine Science and Technology,Hainan University(XTCX2022HYC04,XTCX2022HYC05)the Innovative Research Projects for Graduate Students of Hainan Province(Qhyb2022-89,Qhyb2022-87,Qhys2022-174)the Scientific Research Program Funded by Shaanxi Provincial Education Department(Program No.23JK0439)the specific research fund of The Innovation Platform for Academicians of Hainan Province(YSPTZX202315)。
文摘Bismuth-based catalysts are highly promising for the electrochemical carbon dioxide reduction reaction(eCO_(2)RR)to formate product.However,achieving high activity and selectivity towards formate and ensuring long-term stability remains challenging.This work reports the oxygen plasma inducing strategy to construct the abundant grain boundaries of Bi/BiO_x on ultrathin two-dimensional Bi nanosheets.The oxygen plasma-treated Bi nanosheet(OP-Bi)exhibits over 90%Faradaic efficiency(FE)for formate at a wide potential range from-0.5 to-1.1 V,and maintains a great stability catalytic performance without significant decay over 30 h in flow cell.Moreover,membrane electrode assembly(MEA)device with OPBi as catalyst sustains the robust current density of 100 mA cm^(-2)over 50 h,maintaining a formate FE above 90%.In addition,rechargeable Zn-CO_(2)battery presents the peak power density of1.22 mW cm^(-2)with OP-Bi as bifunctional catalyst.The mechanism experiments demonstrate that the high-density grain boundaries of OP-Bi provide more exposed active sites,faster electron transfer capacity,and the stronger intrinsic activity of Bi atoms.In situ spectroscopy and theo retical calculations further elucidate that the unsaturated Bi coordination atoms between the grain boundaries can effectively activate CO_(2)molecules through elongating the C-O bond,and reducing the formation energy barrier of the key intermediate(^(*)OCOH),thereby enhancing the catalytic performance of eCO_(2)RR to formate product.
基金the National Key Research and Development Program of China(2016YFC0901500).
文摘Amyloidosis is a multisystem disease that is characterized by deposition of fibrils in extracellular tissue,which mainly involves the kidney,heart,and autonomic nervous system.Two types of amyloidosis typically infiltrate the heart,including immunoglobulin light-chain(AL)and amyloid transthyretin(ATTR).ATTR is further subdivided into wild-type ATTR and variant ATTR caused by point mutations in the TTR gene.[1]Wild-type ATTR is considered as not uncommon in older patients with heart failure.Recently,a comprehensive set of consensus recommendations for the suspicion and diagnosis of ATTR was published,with particular focus on the combined application of noninvasive methods.[2]We present here a case of wild-type TTR cardiac amyloidosis(ATTRwt-CA),which was diagnosed by noninvasive modalities,and provide an overview of the recommended diagnostic approach of CA.Furthermore,to the best of our knowledge,this is the first Chinese case of ATTRwt-CA reported to date.
基金supported the following funders: One Hundred Talent Project of Hebei Province (Grant No. E2016100015)National Natural Science Foundation of China (No. 21773053)+2 种基金Hebei provincial Natural Science Foundation (No. B2017201084)Hebei Provincial Technology Foundation for High-level talents (No. CL201601)the science technology research and development guidance program project of Baoding City (No. 16ZF027)
文摘A novel strategy to synthesize copper-based nanoparticles supported on carbon nitride(C3 N4) was developed by popping of mixture containing C3 N4 and cupric nitrate. Characterizations such as X-ray photoelectron spectroscopy(XPS) and X-ray diffraction(XRD) indicate that the structure of g-C3 N4 maintained although a popping process occurred. High resolution transmission electronic microscopy(HRTEM) characterization illustrated that copper-based nanoparticles with diameter of < 1 nm were well distributed on g-C3 N4. This kind of copper catalyst exhibits high catalytic activity and selectivity in arylation of pyrazole, a simple and effect strategy to construct C-N bond in organic chemistry.According to the results of control experiments and characterizations, cuprous oxide should be the catalytic active phase in the supported coperbased catalyst.
