The three-dimensional(3D) Pd-based nanoflower structures,assembled from two-dimensional(2D)nanosheets,are characterized by their stable and ordered configurations.These structures have been extensively designed as ano...The three-dimensional(3D) Pd-based nanoflower structures,assembled from two-dimensional(2D)nanosheets,are characterized by their stable and ordered configurations.These structures have been extensively designed as anode materials for fuel cells.However,the exploration of trimetallic nanoflowers with porous architectures remains limited.In this study,we present a straightforward one-step solvothermal method for the synthesis of trimetallic Pd Cu Ni porous nanoflowers(PNFs).Leveraging several unique advantages,such as an open superstructure,high porosity,and enhanced electronic interactions among the trimetals,the resulting Pd Cu Ni PNFs demonstrate significantly improved electrochemical performance,with mass activities reaching 5.94 and 10.14 A/mg for the ethanol oxidation reaction(EOR)and the ethylene glycol oxidation reaction(EGOR),respectively.Furthermore,the Pd Cu Ni PNFs exhibit optimized d-band centers and the most negative onset oxidation potential,indicating enhanced antitoxicity and stability.This study not only provides a novel perspective on the synthesis of 3D porous nanomaterials but also highlights the potential application value of trimetallic nanoalloys in catalysis.展开更多
The development of a high-performance pH-universal electrocatalyst for hydrogen evolution reaction(HER)is a vital step toward hydrogen economy but remains a major challenge.Herein,the Pd,Cu,and Ni three elements were ...The development of a high-performance pH-universal electrocatalyst for hydrogen evolution reaction(HER)is a vital step toward hydrogen economy but remains a major challenge.Herein,the Pd,Cu,and Ni three elements were confined in a nanoparticle via the microemulsion method.Morphology and structural analysis reveal that PdCuNi nanoparticles are nearly spherical in shape with slight aggregation,and are mainly composed of metallic Pd and Cu,as well as Ni oxide.The electrochemical tests show that PdCuNi exhibits favorable HER catalytic activity in acid(η_(10):45 mV;Tafel slopes:33 mV/dec)and neutral(η_(10):71 mV;Tafel slopes:87 mV/dec)media,and alkaline(η_(10):66 mV;Tafel slopes:116 mV/dec)media.The mechanism analysis implies that the synergistic effect of Pd,Cu,and Ni can improve the inherent conductivity of the catalyst and accelerate the charge transfer process.Furthermore,over 30 h long-term stability has been achieved without significant attenuation.This work provides a strategy for developing versatile and robust multimetallic catalysts towards pH-universal HER.展开更多
基金supported by the National Natural Science Foundation of China (No.52274304)。
文摘The three-dimensional(3D) Pd-based nanoflower structures,assembled from two-dimensional(2D)nanosheets,are characterized by their stable and ordered configurations.These structures have been extensively designed as anode materials for fuel cells.However,the exploration of trimetallic nanoflowers with porous architectures remains limited.In this study,we present a straightforward one-step solvothermal method for the synthesis of trimetallic Pd Cu Ni porous nanoflowers(PNFs).Leveraging several unique advantages,such as an open superstructure,high porosity,and enhanced electronic interactions among the trimetals,the resulting Pd Cu Ni PNFs demonstrate significantly improved electrochemical performance,with mass activities reaching 5.94 and 10.14 A/mg for the ethanol oxidation reaction(EOR)and the ethylene glycol oxidation reaction(EGOR),respectively.Furthermore,the Pd Cu Ni PNFs exhibit optimized d-band centers and the most negative onset oxidation potential,indicating enhanced antitoxicity and stability.This study not only provides a novel perspective on the synthesis of 3D porous nanomaterials but also highlights the potential application value of trimetallic nanoalloys in catalysis.
基金supported in part by the National Natural Science Foundation of China(No.22406050)the Natural Science Foundation of Henan Province(Nos.232300420369,242300420533)。
文摘The development of a high-performance pH-universal electrocatalyst for hydrogen evolution reaction(HER)is a vital step toward hydrogen economy but remains a major challenge.Herein,the Pd,Cu,and Ni three elements were confined in a nanoparticle via the microemulsion method.Morphology and structural analysis reveal that PdCuNi nanoparticles are nearly spherical in shape with slight aggregation,and are mainly composed of metallic Pd and Cu,as well as Ni oxide.The electrochemical tests show that PdCuNi exhibits favorable HER catalytic activity in acid(η_(10):45 mV;Tafel slopes:33 mV/dec)and neutral(η_(10):71 mV;Tafel slopes:87 mV/dec)media,and alkaline(η_(10):66 mV;Tafel slopes:116 mV/dec)media.The mechanism analysis implies that the synergistic effect of Pd,Cu,and Ni can improve the inherent conductivity of the catalyst and accelerate the charge transfer process.Furthermore,over 30 h long-term stability has been achieved without significant attenuation.This work provides a strategy for developing versatile and robust multimetallic catalysts towards pH-universal HER.
