NPs using elemental sulfur,1-hexadecanthiol,thiourea,trioctylphosphine sulfide,elemental selenium,and selenourea.While maintaining mole ratios of 2 mmol sulfur/selenium precursor:mmol Ni,products with phases of Ni_(3)...NPs using elemental sulfur,1-hexadecanthiol,thiourea,trioctylphosphine sulfide,elemental selenium,and selenourea.While maintaining mole ratios of 2 mmol sulfur/selenium precursor:mmol Ni,products with phases of Ni_(3)S_(2),Ni_(9)S_(8),NiS,NiSO_(4)·6H_(2)O,Ni_(3)S_(4),Ni_(3)Se_(2),and NiSe have been obtained.The products have voids that form through the Kirkendall effect during interdiffusion.Trends relating the chemical properties of the precursors to the phases of the products have been identified.While some precursors contained phosphorus,there was no significant incorporation of phosphorus in any of the products.An increase of the NP size during sulfidation and selenidation is consistent with ripening.The application of Ni sulfide and selenide NPs as electrocatalysts for the hydrogen evolution reaction is also demonstrated.展开更多
基金Basic EnergySciences,Grant/Award Number:DE-SC0020234Division ofChemical,Bioengineering,Environmental,andTransportSystems,Grant/Award Number:1605699+2 种基金Division of MaterialsResearch,Grant/Award Number:1056653Division of Electrical,CommunicationsandCyber Systems,Grant/AwardNumber:1542015the NationalSciencefoundation,Grant/Award Numbers:DMR-1056653,CBET-1605699 andCMMI-1763025。
文摘NPs using elemental sulfur,1-hexadecanthiol,thiourea,trioctylphosphine sulfide,elemental selenium,and selenourea.While maintaining mole ratios of 2 mmol sulfur/selenium precursor:mmol Ni,products with phases of Ni_(3)S_(2),Ni_(9)S_(8),NiS,NiSO_(4)·6H_(2)O,Ni_(3)S_(4),Ni_(3)Se_(2),and NiSe have been obtained.The products have voids that form through the Kirkendall effect during interdiffusion.Trends relating the chemical properties of the precursors to the phases of the products have been identified.While some precursors contained phosphorus,there was no significant incorporation of phosphorus in any of the products.An increase of the NP size during sulfidation and selenidation is consistent with ripening.The application of Ni sulfide and selenide NPs as electrocatalysts for the hydrogen evolution reaction is also demonstrated.
