Search results for: Jiagang Wu

Items from 1 to 20 out of 194 results

article

Facilitating Formate Selectivity via Optimizing e_g* Band Broadening in NiMn Hydroxides for Ethylene Glycol Electro‐Oxidation

Zhen Wang, Junhua Li, Qi Zhang, Chao Wu, more

Angewandte Chemie International Edition > 63 > 44 > n/a - n/a

Ethylene glycol electro‐oxidation reaction (EGOR) on nickel‐based hydroxides (Ni(OH)₂) represents a promising strategy for generating value‐added chemicals, i.e. formate and glycolate, and coupling water‐electrolytic hydrogen production. The high product selectivity was one of the most significant area of polyols electro‐oxidation process. Yet, developing Ni(OH)₂‐based EGOR electrocatalyst with highly...

article

Enhanced Temperature Stability of Pyroelectric Sensing in Multilayer Potassium Sodium Niobate‐Based Ceramics with Graded Polarization Rotation

Yumin Zhang, Lanji Wen, Yuntao Huang, Dechao Meng, more

Small > 20 > 43 > n/a - n/a

Pyroelectric effect which refers to electrical responses induced by time temperature‐dependent fluctuations has received extensive attention, showing promising application prospects for infrared (IR) technology. Although enhanced pyroelectric performances are obtained in potassium sodium niobate‐based ceramics at room temperature via multi‐symmetries coexistence design, the poor pyroelectric temperature...

article

Facilitating Formate Selectivity via Optimizing e_g* Band Broadening in NiMn Hydroxides for Ethylene Glycol Electro‐Oxidation

Zhen Wang, Junhua Li, Qi Zhang, Chao Wu, more

Angewandte Chemie > 136 > 44 > n/a - n/a

article

Cell‐Anchored Lead‐Free Piezoelectric KNN NPs Resisting Washout for Low‐Intensity Ultrasound Driven Neuromodulation

Yusheng Zhang, Junzhong Jiang, Xianwei Xie, Laiming Jiang, more

Advanced Functional Materials > 34 > 42 > n/a - n/a

Piezoelectric nanomaterials for wireless neuromodulation is a promising alternative to traditional electrical stimulation. However, the low‐avidity between piezoelectric nanomaterials and cellular membranes leads to low efficiency of electrical signal transmission, which requires high‐intensity thresholds of ultrasound stimulation (US). Here, lead‐free piezoelectric (K,Na)NbO₃ (KNN) nanoparticles...

article

Promoting Surface Reconstruction in Spinel Oxides via Tetrahedral‐Octahedral Phase Boundary Construction for Efficient Oxygen Evolution

Anqi Zou, Chao Wu, Qi Zhang, Ying Tang, more

Angewandte Chemie > 136 > 42 > n/a - n/a

Understanding the origin of surface reconstruction is crucial for developing highly efficient lattice oxygen oxidation mechanism (LOM) based spinel oxides. Traditionally, the reconstruction has been achieved through electrochemical procedures, such as cyclic voltammetry (CV), linear sweep voltammetry (LSV). In this work, we found that the surface reconstruction in LOM‐based CoFe_0.25Al_1.75O₄ catalyst...

article

Modified Re‐Entrant‐Like (K, Na)NbO₃‐Based Relaxors with Superior Electrostrain Properties

Xin Wang, Xi‐xi Sun, Yuxuan Yang, Xiaodong Hao, more

Advanced Functional Materials > 34 > 41 > n/a - n/a

Piezoceramics with large strain output, low hysteresis, and wide operation temperature are indispensable for the high‐end displacement control. Unfortunately, requiring these merits simultaneously remains a long‐standing challenge for lead‐free piezoceramics promising for replacing lead‐based ones. Herein a new strategy to resolve this challenge by developing modified re‐entrant‐like potassium sodium...

article

Promoting Surface Reconstruction in Spinel Oxides via Tetrahedral‐Octahedral Phase Boundary Construction for Efficient Oxygen Evolution

Anqi Zou, Chao Wu, Qi Zhang, Ying Tang, more

Angewandte Chemie International Edition > 63 > 42 > n/a - n/a

article

Realization of the Giant Pyroelectric Response via Modulated Polar Structures

Lanji Wen, Xiaojun Wu, Jie Yin, Yumin Zhang, more

Small > 20 > 28 > n/a - n/a

Among pyroelectric materials, Bi_0.5Na_0.5TiO₃ (BNT)‐based relaxors are particularly noteworthy due to their significant polarization fluctuation near the depolarization temperature (T_d), resulting in a large pyroelectric response. What has been overlooked is the dynamic behavior of inherent polar structures, particularly the temperature‐dependent evolution of polar nanoregions (PNRs), which significantly...

article

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Junhua Li, Chao Wu, Zhen Wang, Haoyan Meng, more

Angewandte Chemie International Edition > 63 > 25 > n/a - n/a

The anodic methanol oxidation reaction (MOR) plays a crucial role in coupling with the cathodic hydrogen evolution reaction (HER) and enables the sustainable production of the high‐valued formate. Nickel‐based hydroxide (Ni(OH)₂) as MOR electrocatalyst has attracted enormous attention. However, the key factor determining the intrinsic catalytic activity remains unknown, which significantly hinders...

article

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Junhua Li, Chao Wu, Zhen Wang, Haoyan Meng, more

Angewandte Chemie > 136 > 25 > n/a - n/a

article

Structural disorder and oxygen octahedron evolution via defect engineering for properties enhancement in BF–BT ceramics

Bing Li, Ting Zheng, Jiagang Wu

Journal of the American Ceramic Society > 107 > 7 > 4789 - 4800

The electrostrain properties of bismuth ferrite–barium titanate (BF–BT)‐based ceramics can be well regulated; however, this often occurs at the cost of piezoelectricity, and their electrostrain‐temperature stability is poor. To address these problems, defect engineering has been utilized to enhance the comprehensive properties via the unequal substitution of Na⁺. In this study, 0.69BiFeO₃–0.3BaTiO...

article

Lead‐Free (K, Na)NbO₃ Piezocatalyst with Superior Piezocatalysis and Large‐Scale Production

Xuzong Wang, Nan Wang, Jiayang Liao, Xin Wang, more

Advanced Functional Materials > 34 > 14 > n/a - n/a

Although piezocatalysis has achieved preliminary achievements in environmental remediation and biomedical applications, large‐scale fabrication of piezocatalysts with high degradation efficiency and low cost remains challenging. In this work, a new and easy strategy to solve this challenge is innovatively proposed, that is, ceramic‐powder‐driven boosted polarization intensity, and validated the strategy...

article

Grain Boundary Diffusion Hardening in Potassium Sodium Niobate‐Based Ceramics with Full Gradient Composition and High Piezoelectricity

Yumin Zhang, Xinya Feng, Fei Li, Dechao Meng, more

Advanced Functional Materials > 33 > 42 > n/a - n/a

Reducing mechanical losses and suppressing self‐heating are critical characteristics for high‐power piezoelectric applications. For environmentally friendly Pb‐free piezoelectric ceramics, traditional acceptor doping or annealing treatments have successfully improved the mechanical quality factor (Q_m) based on a ceramic matrix with a poor piezoelectric coefficient (d₃₃<100 pC/N). Nevertheless,...

article

Mechanochemical Synthesis of Aryl Fluorides by Using Ball Milling and a Piezoelectric Material as the Redox Catalyst

Xiaohong Wang, Xuemei Zhang, Li Xue, Qingqing Wang, more

Angewandte Chemie > 135 > 39 > n/a - n/a

Aryl fluorides are important structural motifs in many pharmaceuticals. Although the Balz–Schiemann reaction provides an entry to aryl fluorides from aryldiazonium tetrafluoroborates, it suffers from drawbacks such as long reaction time, high temperature, toxic solvent, toxic gas release, and low functional group tolerance. Here, we describe a general method for the synthesis of aryl fluorides from...

article

Mechanochemical Synthesis of Aryl Fluorides by Using Ball Milling and a Piezoelectric Material as the Redox Catalyst

Xiaohong Wang, Xuemei Zhang, Li Xue, Qingqing Wang, more

Angewandte Chemie International Edition > 62 > 39 > n/a - n/a

article

Accelerated Surface Reconstruction through Regulating the Solid‐Liquid Interface by Oxyanions in Perovskite Electrocatalysts for Enhanced Oxygen Evolution

Ying Tang, Chao Wu, Qi Zhang, Haoyin Zhong, more

Angewandte Chemie International Edition > 62 > 37 > n/a - n/a

A comprehensive understanding of surface reconstruction was critical to developing high performance lattice oxygen oxidation mechanism (LOM) based perovskite electrocatalysts. Traditionally, the primary determining factor of the surface reconstruction process was believed to be the oxygen vacancy formation energy. Hence, most previous studies focused on optimizing composition to reduce the oxygen...

article

KNN–Eu transparent ferroelectrics: Local structure and luminescent property

Lingjie Wu, Zhi Tan, Ting Zheng, Jiagang Wu

Journal of the American Ceramic Society > 106 > 11 > 6664 - 6674

Differ from the rapid development of piezoelectricity in potassium sodium niobate (KNN) ceramics, the progress of photoluminescence in transparent KNN ferroelectric ceramics remains stagnant. Herein, europium (Eu)‐doped KNN ceramics have been prepared to investigate its local structure and optical–electrical multi‐functionality. Both enhanced piezoelectricity in ceramics with a bimodal distribution...

article

Accelerated Surface Reconstruction through Regulating the Solid‐Liquid Interface by Oxyanions in Perovskite Electrocatalysts for Enhanced Oxygen Evolution

Ying Tang, Chao Wu, Qi Zhang, Haoyin Zhong, more

Angewandte Chemie > 135 > 37 > n/a - n/a

article

Boosting Piezo‐Catalytic Activity of KNN‐Based Materials with Phase Boundary and Defect Engineering

Jiayang Liao, Xiang Lv, Xi‐xi Sun, Junhua Li, more

Advanced Functional Materials > 33 > 34 > n/a - n/a

Although the piezo‐catalysis is promising for the environmental remediation and biomedicine, the piezo‐catalytic properties of various piezoelectric materials are limited by low carrier concentrations and mobility, and rapid electron‐hole pair recombination, and reported regulating strategies are quite complex and difficult. Herein, a new and simple strategy, integrating phase boundary engineering...

article

Origin of Surface Reconstruction in Lattice Oxygen Oxidation Mechanism Based‐Transition Metal Oxides: A Spontaneous Chemical Process

Chao Wu, Xiaopeng Wang, Ying Tang, Haoyin Zhong, more

Angewandte Chemie > 135 > 21 > n/a - n/a

A fundamental understanding of surface reconstruction process is pivotal to developing highly efficient lattice oxygen oxidation mechanism (LOM) based electrocatalysts. Traditionally, the surface reconstruction in LOM based metal oxides is believed as an irreversible oxygen redox behavior, due to the much slower rate of OH⁻ refilling than that of oxygen vacancy formation. Here, we found that the surface...

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INFONA - science communication portal

Search results for: Jiagang Wu

Facilitating Formate Selectivity via Optimizing e_g* Band Broadening in NiMn Hydroxides for Ethylene Glycol Electro‐Oxidation

Enhanced Temperature Stability of Pyroelectric Sensing in Multilayer Potassium Sodium Niobate‐Based Ceramics with Graded Polarization Rotation

Facilitating Formate Selectivity via Optimizing e_g* Band Broadening in NiMn Hydroxides for Ethylene Glycol Electro‐Oxidation

Cell‐Anchored Lead‐Free Piezoelectric KNN NPs Resisting Washout for Low‐Intensity Ultrasound Driven Neuromodulation

Promoting Surface Reconstruction in Spinel Oxides via Tetrahedral‐Octahedral Phase Boundary Construction for Efficient Oxygen Evolution

Modified Re‐Entrant‐Like (K, Na)NbO₃‐Based Relaxors with Superior Electrostrain Properties

Promoting Surface Reconstruction in Spinel Oxides via Tetrahedral‐Octahedral Phase Boundary Construction for Efficient Oxygen Evolution

Realization of the Giant Pyroelectric Response via Modulated Polar Structures

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Unveiling the Pivotal Role of d_x2−y2 Electronic States in Nickel‐Based Hydroxide Electrocatalysts for Methanol Oxidation

Structural disorder and oxygen octahedron evolution via defect engineering for properties enhancement in BF–BT ceramics

Lead‐Free (K, Na)NbO₃ Piezocatalyst with Superior Piezocatalysis and Large‐Scale Production

Grain Boundary Diffusion Hardening in Potassium Sodium Niobate‐Based Ceramics with Full Gradient Composition and High Piezoelectricity

Mechanochemical Synthesis of Aryl Fluorides by Using Ball Milling and a Piezoelectric Material as the Redox Catalyst

Mechanochemical Synthesis of Aryl Fluorides by Using Ball Milling and a Piezoelectric Material as the Redox Catalyst

Accelerated Surface Reconstruction through Regulating the Solid‐Liquid Interface by Oxyanions in Perovskite Electrocatalysts for Enhanced Oxygen Evolution

KNN–Eu transparent ferroelectrics: Local structure and luminescent property

Accelerated Surface Reconstruction through Regulating the Solid‐Liquid Interface by Oxyanions in Perovskite Electrocatalysts for Enhanced Oxygen Evolution

Boosting Piezo‐Catalytic Activity of KNN‐Based Materials with Phase Boundary and Defect Engineering

Origin of Surface Reconstruction in Lattice Oxygen Oxidation Mechanism Based‐Transition Metal Oxides: A Spontaneous Chemical Process

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