Metallic phosphides as a crucial class of metal-like compounds show high electric conductivity and electrochemical properties.It is of significant benefit to understanding the relationship between the electrocatalytic...Metallic phosphides as a crucial class of metal-like compounds show high electric conductivity and electrochemical properties.It is of significant benefit to understanding the relationship between the electrocatalytic performance and phosphating degree of precursors.In this work,using Co3O4@SiO2 as precursor,core-shell structured CoP@SiO2 nanoreactors with outstanding oxygen evolution reaction performance were synthesized through a facile calcination method.The electrocatalytic performance of CoP@SiO2 modified electrode that treated with 500 mg NaH2PO2 was greatly enhanced.The obtained product displays a low overpotential of 280 mV at a current density of 10 mA/cm2 and a Tafel value 89 mV/dec in alkaline conditions.The easy available CoP@SiO2 with outstanding catalytic performance and stability possesses huge potential in future electrochemical applications.展开更多
The delicate serpentine structures are widely used in high-performance stretchable electronics over the past decade.The metal interconnects encapsulated in biocompatible polymer Parylene-C film is a superior choice fo...The delicate serpentine structures are widely used in high-performance stretchable electronics over the past decade.The metal interconnects encapsulated in biocompatible polymer Parylene-C film is a superior choice for long-term implantation in vivo,especially as neural interface to acquire electrophysiological signals or apply electrical stimulation.To avoid the physical contact damages from the neural tissues such as the brain or peripheral nerves,serpentine interconnects are utilized as stretchable electrodes and usually bonded to the soft elastomer substrate.The adhesion strength between the serpentine interconnects and the elastomer substrate becomes a considerable issue to ensure reliability and structural integrity.In this paper,the stretchable Parylene-C electrodes can be transfer printed onto arbitrary elastomer substrates by a thin layer of silicone rubber adhesive with low modulus for electrocorticogram(ECoG)recording.Mechanical simulation of serpentine structures consisting of same periodic arcs and different straight segments is investigated by uniaxial stretching.Then,the elastic stretchability of serpentine electrodes is further studied by simulation and experiments.After 5000 repetitive stretching cycles,the electrochemical impedance of microelectrodes remains in steady states.These results prove that the silicone rubber adhesive facilitates the interfacial bonding in the structure of stretchable electrodes as the compliant and reliable neural interface.展开更多
基金supported by the National Natural Science Foundation of China(Nos.U1904215,21671170 and 21673203)the Top-notch Academic Programs Project of Jiangsu Higher Education Institutions(TAPP)+4 种基金Program for New Century Excellent Talents of the University in China(No.NCET-13-0645)the Six Talent Plan(No.2015XCL-030)Qinglan Project of JiangsuProgram for Colleges Natural Science Research in Jiangsu Province(No.18KJB150036)the Science and Technology Innovation Foster Foundation of Yangzhou University(No.2016CXJ010)。
文摘Metallic phosphides as a crucial class of metal-like compounds show high electric conductivity and electrochemical properties.It is of significant benefit to understanding the relationship between the electrocatalytic performance and phosphating degree of precursors.In this work,using Co3O4@SiO2 as precursor,core-shell structured CoP@SiO2 nanoreactors with outstanding oxygen evolution reaction performance were synthesized through a facile calcination method.The electrocatalytic performance of CoP@SiO2 modified electrode that treated with 500 mg NaH2PO2 was greatly enhanced.The obtained product displays a low overpotential of 280 mV at a current density of 10 mA/cm2 and a Tafel value 89 mV/dec in alkaline conditions.The easy available CoP@SiO2 with outstanding catalytic performance and stability possesses huge potential in future electrochemical applications.
基金supported by the National Key R&D Program of China under grant 2017YFB1002501the National Natural Science Foundation of China(No.61728402,No.31600781 and 31972929)+2 种基金Research Program of Shanghai Science and Technology Committee(17JC1402800,17JC1400202 and 19ZR1475000)Program of Shanghai Academic/Technology Research Leader(18XD1401900)Interdisciplinary Program of Shanghai Jiao Tong University(YG2016MS06).
文摘The delicate serpentine structures are widely used in high-performance stretchable electronics over the past decade.The metal interconnects encapsulated in biocompatible polymer Parylene-C film is a superior choice for long-term implantation in vivo,especially as neural interface to acquire electrophysiological signals or apply electrical stimulation.To avoid the physical contact damages from the neural tissues such as the brain or peripheral nerves,serpentine interconnects are utilized as stretchable electrodes and usually bonded to the soft elastomer substrate.The adhesion strength between the serpentine interconnects and the elastomer substrate becomes a considerable issue to ensure reliability and structural integrity.In this paper,the stretchable Parylene-C electrodes can be transfer printed onto arbitrary elastomer substrates by a thin layer of silicone rubber adhesive with low modulus for electrocorticogram(ECoG)recording.Mechanical simulation of serpentine structures consisting of same periodic arcs and different straight segments is investigated by uniaxial stretching.Then,the elastic stretchability of serpentine electrodes is further studied by simulation and experiments.After 5000 repetitive stretching cycles,the electrochemical impedance of microelectrodes remains in steady states.These results prove that the silicone rubber adhesive facilitates the interfacial bonding in the structure of stretchable electrodes as the compliant and reliable neural interface.
