Green hydrogen(H_(2))produced by renewable energy powered alkaline water electrolysis is a promising alternative to fossil fuels due to its high energy density with zero-carbon emissions.However,efficient and economic...Green hydrogen(H_(2))produced by renewable energy powered alkaline water electrolysis is a promising alternative to fossil fuels due to its high energy density with zero-carbon emissions.However,efficient and economic H_(2) production by alkaline water electrolysis is hindered by the sluggish hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Therefore,it is imperative to design and fabricate high-active and low-cost non-precious metal catalysts to improve the HER and OER performance,which affects the energy efficiency of alkaline water electrolysis.Ni_(3)S_(2) with the heazlewoodite structure is a potential electrocatalyst with near-metal conductivity due to the Ni–Ni metal network.Here,the review comprehensively presents the recent progress of Ni_(3)S_(2)-based electrocatalysts for alkaline water electrocatalysis.Herein,the HER and OER mechanisms,performance evaluation criteria,preparation methods,and strategies for performance improvement of Ni_(3)S_(2)-based electrocatalysts are discussed.The challenges and perspectives are also analyzed.展开更多
To the Editor:Varicoceles(VCs)refer to the dilation of the veins of the pampiniform plexus.The primary treatment method for VCs with definite surgical indications is the surgical treatment.With the development of mini...To the Editor:Varicoceles(VCs)refer to the dilation of the veins of the pampiniform plexus.The primary treatment method for VCs with definite surgical indications is the surgical treatment.With the development of minimally invasive technology,the application of microscopic subinguinal varicocelectomy(MSV)has gradually increased in recent years and has become the standard treatment method for VCs.[1]In the long-term clinical practice of our department,some young people have required surgery for VCs due to physical examination in special industries(e.g.,military physical examination).They have wanted the incision to be esthetic,seamless,and concealed.With the expectation of cosmesis,we have made some improvements in the selection of the surgical incision.Using the Scar Cosmesis Assessment and Rating(SCAR)scale,[2]we comprehensively evaluated the cosmetic effects of patients undergoing improved MSV(IMSV)and MSV in this study.展开更多
基金supported by the National Key Research and Development Program(No.2022YFB4202200)the Fundamental Research Funds for the Central Universities.
文摘Green hydrogen(H_(2))produced by renewable energy powered alkaline water electrolysis is a promising alternative to fossil fuels due to its high energy density with zero-carbon emissions.However,efficient and economic H_(2) production by alkaline water electrolysis is hindered by the sluggish hydrogen evolution reaction(HER)and oxygen evolution reaction(OER).Therefore,it is imperative to design and fabricate high-active and low-cost non-precious metal catalysts to improve the HER and OER performance,which affects the energy efficiency of alkaline water electrolysis.Ni_(3)S_(2) with the heazlewoodite structure is a potential electrocatalyst with near-metal conductivity due to the Ni–Ni metal network.Here,the review comprehensively presents the recent progress of Ni_(3)S_(2)-based electrocatalysts for alkaline water electrocatalysis.Herein,the HER and OER mechanisms,performance evaluation criteria,preparation methods,and strategies for performance improvement of Ni_(3)S_(2)-based electrocatalysts are discussed.The challenges and perspectives are also analyzed.
基金supported by the grant from 2018 National Key Research&Development Plan(No.SQ2018YFC 10002704).
文摘To the Editor:Varicoceles(VCs)refer to the dilation of the veins of the pampiniform plexus.The primary treatment method for VCs with definite surgical indications is the surgical treatment.With the development of minimally invasive technology,the application of microscopic subinguinal varicocelectomy(MSV)has gradually increased in recent years and has become the standard treatment method for VCs.[1]In the long-term clinical practice of our department,some young people have required surgery for VCs due to physical examination in special industries(e.g.,military physical examination).They have wanted the incision to be esthetic,seamless,and concealed.With the expectation of cosmesis,we have made some improvements in the selection of the surgical incision.Using the Scar Cosmesis Assessment and Rating(SCAR)scale,[2]we comprehensively evaluated the cosmetic effects of patients undergoing improved MSV(IMSV)and MSV in this study.
