In this study,a novel Pt-loaded Cu Pc/g-C_(3)N_(4)(Pt Cu CN)composite was synthesized for the selective photocatalytic reduction of CO_(2)to CH_(4)under visible light.The Pt Cu CN catalyst achieved a CH_(4)yield of 3...In this study,a novel Pt-loaded Cu Pc/g-C_(3)N_(4)(Pt Cu CN)composite was synthesized for the selective photocatalytic reduction of CO_(2)to CH_(4)under visible light.The Pt Cu CN catalyst achieved a CH_(4)yield of 39.8μmol g^(-1)h^(-1),significantly outperforming bulk g-C_(3)N_(4)and Cu Pc alone by factors of 2.5 and 3.1,respectively,with a high selectivity of 90%.In comparison with other commonly studied photocatalysts,such as g-C_(3)N_(4)-based catalysts,the Pt Cu CN composite exhibited superior CH_(4)yield and product selectivity,demonstrating its potential as a more efficient photocatalyst for CO_(2)reduction.X-ray photoelectron spectroscopy(XPS),density functional theory(DFT)calculations,and in-situ infrared(IR)analysis revealed that the Pt^(0)species effectively lower the activation energy for CH_(4)formation,while Cu Pc extends the light absorption range and enhances charge separation.The combined effects of these components in a Z-scheme heterojunction provide new insights into designing highly selective CO_(2)-to-CH_(4)photocatalysts.This work demonstrates the potential of Pt Cu CN as a highly efficient and stable catalyst for CO_(2)reduction to CH_(4)under visible light.展开更多
Ultralow Pt-loading Au nanoparticles have been fabricated on the surface of reduced graphene oxide （RGO） by using underpotential deposition （UPD） monolayer redox replacement process. The Pt/Au/RGO modified electro...Ultralow Pt-loading Au nanoparticles have been fabricated on the surface of reduced graphene oxide （RGO） by using underpotential deposition （UPD） monolayer redox replacement process. The Pt/Au/RGO modified electrode exhibits an excellent electrocatalytic activity toward catechol and hydroquinone. Under the optimized condition, the separation of peak-to-peak between hydroquinone and catechol is 197 mV, which is wide enough to distinguish the isomers of benzenediol. Catechol is detected by the Pt/Au/RGO/GCE with a low detection limit in the presence of hydroquinone.展开更多
基金financial support from the National Natural Science Foundation of China(Grant NO.22466023,52470119,52260013)the Applied Basic Research Foundation of Yunnan Province(Grant NO.202401AT070408)+1 种基金Yunnan Provincial Key Laboratory of Energy Saving in Phosphorus Chemical Engineering and New Phosphorus Materials(Grant NO.202205AG070067)Yunnan Technological Innovation Center of Phosphorus Resources(Grant NO.202305AK340002)。
文摘In this study,a novel Pt-loaded Cu Pc/g-C_(3)N_(4)(Pt Cu CN)composite was synthesized for the selective photocatalytic reduction of CO_(2)to CH_(4)under visible light.The Pt Cu CN catalyst achieved a CH_(4)yield of 39.8μmol g^(-1)h^(-1),significantly outperforming bulk g-C_(3)N_(4)and Cu Pc alone by factors of 2.5 and 3.1,respectively,with a high selectivity of 90%.In comparison with other commonly studied photocatalysts,such as g-C_(3)N_(4)-based catalysts,the Pt Cu CN composite exhibited superior CH_(4)yield and product selectivity,demonstrating its potential as a more efficient photocatalyst for CO_(2)reduction.X-ray photoelectron spectroscopy(XPS),density functional theory(DFT)calculations,and in-situ infrared(IR)analysis revealed that the Pt^(0)species effectively lower the activation energy for CH_(4)formation,while Cu Pc extends the light absorption range and enhances charge separation.The combined effects of these components in a Z-scheme heterojunction provide new insights into designing highly selective CO_(2)-to-CH_(4)photocatalysts.This work demonstrates the potential of Pt Cu CN as a highly efficient and stable catalyst for CO_(2)reduction to CH_(4)under visible light.
基金This work was financially supported by the National Natural Science Foundation of China （21271136）, Natural Science Foundation of Anhui Province （1408085QB41, 1408085MB40）, Natural Science Research Project of Education Department of Anhui Province （KJ2013A247, K J2016A888）, Anhui Province Cultivate Outstanding Talent （2014SQR01）, Opening Project of Anhui Key Laboratory of Spin Electron and Na- nomaterials （2013YKF20, 2014YKF52, 2011YKF03, 2014YKF35）, the Program of Innovative Research Team of Anhui Provincial Education Department （Photoelectric information material new energy device）, Innovative Research Team of Suzhou University （2013kytd02）, Suzhou University Cultivate Outstanding Talent （No. 2014XQNRL005）, and the College Students＇ Innovative Entrepreneurial Training Plan Program of Anhui Province （201510379133, 201410379067）.
文摘Ultralow Pt-loading Au nanoparticles have been fabricated on the surface of reduced graphene oxide （RGO） by using underpotential deposition （UPD） monolayer redox replacement process. The Pt/Au/RGO modified electrode exhibits an excellent electrocatalytic activity toward catechol and hydroquinone. Under the optimized condition, the separation of peak-to-peak between hydroquinone and catechol is 197 mV, which is wide enough to distinguish the isomers of benzenediol. Catechol is detected by the Pt/Au/RGO/GCE with a low detection limit in the presence of hydroquinone.
