Search results for: Xiaoqing Pan

Items from 1 to 20 out of 81 results

article

Perovskite‐Oxide‐Based Ferroelectric Synapses Integrated on Silicon

Ningchong Zheng, Yipeng Zang, Jiayi Li, Cong Shen, more

Advanced Functional Materials > 34 > 32 > n/a - n/a

Perovskite‐oxide‐based ferroelectric tunnel junctions (FTJs) hold great potential for applications in non‐volatile memory and neuromorphic computing due to their unique properties. However, the challenges in synthesizing high crystalline quality perovskite oxides directly on silicon wafer limit the applications of these FTJs in conventional Si‐based integrated circuits, let alone the neural networks...

article

Synergizing Fe₂O₃ Nanoparticles on Single Atom Fe‐N‐C for Nitrate Reduction to Ammonia at Industrial Current Densities

Eamonn Murphy, Baiyu Sun, Martina Rüscher, Yuanchao Liu, more

Advanced Materials > 36 > 27 > n/a - n/a

The electrochemical reduction of nitrates (NO₃⁻) enables a pathway for the carbon neutral synthesis of ammonia (NH₃), via the nitrate reduction reaction (NO₃RR), which has been demonstrated at high selectivity. However, to make NH₃ synthesis cost‐competitive with current technologies, high NH₃ partial current densities (j_NH3) must be achieved to reduce the levelized cost of NH₃. Here, the high NO₃...

article

NiFe Nanoparticle Nest Supported on Graphene as Electrocatalyst for Highly Efficient Oxygen Evolution Reaction

Zhaoyuan Lyu, Sheng Yu, Maoyu Wang, Peter Tieu, more

Small > 20 > 15 > n/a - n/a

Designing cost‐efffective electrocatalysts for the oxygen evolution reaction (OER) holds significant importance in the progression of clean energy generation and efficient energy storage technologies, such as water splitting and rechargeable metal–air batteries. In this work, an OER electrocatalyst is developed using Ni and Fe precursors in combination with different proportions of graphene oxide...

article

Effect of Phosphorus Modulation in Iron Single‐Atom Catalysts for Peroxidase Mimicking

Shichao Ding, Jordan Alysia Barr, Zhaoyuan Lyu, Fangyu Zhang, more

Advanced Materials > 36 > 10 > n/a - n/a

Fe–N–C single‐atom catalysts (SACs) exhibit excellent peroxidase (POD)‐like catalytic activity, owing to their well‐defined isolated iron active sites on the carbon substrate, which effectively mimic the structure of natural peroxidase's active center. To further meet the requirements of diverse biosensing applications, SAC POD‐like activity still needs to be continuously enhanced. Herein, a phosphorus...

article

In Situ Observation of Domain Wall Lateral Creeping in a Ferroelectric Capacitor

Songhua Cai, Changqing Guo, Ben Niu, Lin Xie, more

Advanced Functional Materials > 33 > 50 > n/a - n/a

As a promising candidate for next‐generation nonvolatile memory devices, ferroelectric oxide films exhibit many emergent phenomena with functional applications, making understanding polarization switching and domain evolution behaviors of fundamental importance. However, tracking domain wall motion in ferroelectric oxide films with high spatial resolution remains challenging. Here, an in situ biasing...

article

Bifunctional Ultrathin RhRu_0.5‐Alloy Nanowire Electrocatalysts for Hydrazine‐Assisted Water Splitting

Xiaoyang Fu, Dongfang Cheng, Chengzhang Wan, Simran Kumari, more

Advanced Materials > 35 > 23 > n/a - n/a

Hydrazine‐assisted water electrolysis offers a feasible path for low‐voltage green hydrogen production. Herein, the design and synthesis of ultrathin RhRu_0.5‐alloy wavy nanowires as bifunctional electrocatalysts for both the anodic hydrazine oxidation reaction (HzOR) and the cathodic hydrogen evolution reaction (HER) is reported. It is shown that the RhRu_0.5‐alloy wavy nanowires can achieve complete...

article

Asymmetric Exchange Interaction Induces Highly Efficient Alkaline Hydrogen Evolution in RhFe Bimetallene

Kun Yan, Tingting Wei, Hengdong Ren, Jianghua Wu, more

Small > 18 > 42 > n/a - n/a

An RhFe bimetallene with Fe atoms doped into Rh host for efficient hydrogen evolution reaction (HER), is constructed. When two doped Fe atoms occupy neighboring asymmetric spatial positions, their asymmetric exchange interaction drives electron hopping between the d_xy orbital of a Fe atom and the d_z₂ orbital of its neighboring Fe atom to push the d band center closer to the Fermi level as a result...

article

Single‐Atomic Iron Doped Carbon Dots with Both Photoluminescence and Oxidase‐Like Activity

Xin Li, Shichao Ding, Zhaoyuan Lyu, Peter Tieu, more

Small > 18 > 37 > n/a - n/a

Multifunctional nanozymes can benefit biochemical analysis via expanding sensing modes and enhancing analytical performance, but designing multifunctional nanozymes to realize the desired sensing of targets is challenging. In this work, single‐atomic iron doped carbon dots (SA Fe‐CDs) are designed and synthesized via a facile in situ pyrolysis process. The small‐sized CDs not only maintain their tunable...

article

Flexoelectric Domain Walls Originated from Structural Phase Transition in Epitaxial BiVO₄ Films

Pao‐Wen Shao, Heng‐Jui Liu, Yuanwei Sun, Mei Wu, more

Small > 18 > 19 > n/a - n/a

Polar domain walls in centrosymmetric ferroelastics induce inhomogeneity that is the origin of advantageous multifunctionality. In particular, polar domain walls promote charge‐carrier separation and hence are promising for energy conversion applications that overcome the hurdles of the rate‐limiting step in the traditional photoelectrochemical water splitting processes. Yet, while macroscopic studies...

article

Giant Thermal Transport Tuning at a Metal/Ferroelectric Interface

Yipeng Zang, Chen Di, Zhiming Geng, Xuejun Yan, more

Advanced Materials > 34 > 3 > n/a - n/a

Interfacial thermal transport plays a prominent role in the thermal management of nanoscale objects and is of fundamental importance for basic research and nanodevices. At metal/insulator interfaces, a configuration commonly found in electronic devices, heat transport strongly depends upon the effective energy transfer from thermalized electrons in the metal to the phonons in the insulator. However,...

article

Overwork, job embeddedness and turnover intention among Chinese knowledge workers

Hongwei Huang, Xue Xia, Wenxi Zhao, Xiaoqing Pan, more

Asia Pacific Journal of Human Resources > 59 > 3 > 442 - 459

A growing number of scholars are beginning to pay attention to the problems caused by overwork of knowledge workers. Overwork affects the health of workers in general, and has a variety of specific effects on the work of knowledge workers. This paper explores how overworking correlates with turnover intention among knowledge workers in China, and how job embeddedness acts as an intermediary factor...

article

Directly Probing the Local Coordination, Charge State, and Stability of Single Atom Catalysts by Advanced Electron Microscopy: A Review

Peter Tieu, Xingxu Yan, Mingjie Xu, Phillip Christopher, more

Small > 17 > 16 > n/a - n/a

The drive for atom efficient catalysts with carefully controlled properties has motivated the development of single atom catalysts (SACs), aided by a variety of synthetic methods, characterization techniques, and computational modeling. The distinct capabilities of SACs for oxidation, hydrogenation, and electrocatalytic reactions have led to the optimization of activity and selectivity through composition...

article

An Ion‐Imprinting Derived Strategy to Synthesize Single‐Atom Iron Electrocatalysts for Oxygen Reduction

Shichao Ding, Zhaoyuan Lyu, Hong Zhong, Dong Liu, more

Small > 17 > 16 > n/a - n/a

Carbon‐based single‐atom catalysts (CSACs) have recently received extensive attention in catalysis research. However, the preparation process of CSACs involves a high‐temperature treatment, during which metal atoms are mobile and aggregated into nanoparticles, detrimental to the catalytic performance. Herein, an ion‐imprinting derived strategy is proposed to synthesize CSACs, in which isolated metal–nitrogen–carbon...

article

The effects of stoichiometry on the properties of exsolved Ni‐Fe alloy nanoparticles for dry methane reforming

Soham Shah, Samuel Sayono, Jenna Ynzunza, Ryan Pan, more

AIChE Journal > 66 > 12 > n/a - n/a

The dry reforming of methane has received notable attention as a chemical process to convert natural gas into value‐added chemicals and fuels. Ni‐based exsolution catalysts using perovskite oxides supports have been used for their attractive sinter‐resistance and coke‐resistance properties. The perovskite oxide in itself has unique defect chemistry that can be used to manipulate and control the properties...

article

Size‐Dependent Nickel‐Based Electrocatalysts for Selective CO₂ Reduction

Zhida Li, Dong He, Xingxu Yan, Sheng Dai, more

Angewandte Chemie International Edition > 59 > 42 > 18572 - 18577

Closing the anthropogenic carbon cycle by converting CO₂ into reusable chemicals is an attractive solution to mitigate rising concentrations of CO₂ in the atmosphere. Herein, we prepared Ni metal catalysts ranging in size from single atoms to over 100 nm and distributed them across N‐doped carbon substrates which were obtained from converted zeolitic imidazolate frameworks (ZIF). The results show...

article

Size‐Dependent Nickel‐Based Electrocatalysts for Selective CO₂ Reduction

Zhida Li, Dong He, Xingxu Yan, Sheng Dai, more

Angewandte Chemie > 132 > 42 > 18731 - 18736

article

Strong Electronic Interaction of Amorphous Fe₂O₃ Nanosheets with Single‐Atom Pt toward Enhanced Carbon Monoxide Oxidation

Wenlong Chen, Yanling Ma, Fan Li, Lei Pan, more

Advanced Functional Materials > 29 > 42 > n/a - n/a

Platinum‐based catalysts are critical to several chemical processes, but their efficiency is not satisfying enough in some cases, because only the surface active‐site atoms participate in the reaction. Henceforth, catalysts with single‐atom dispersions are highly desirable to maximize their mass efficiency, but fabricating these structures using a controllable method is still challenging. Most previous...

article

Intrinsic Conductance of Domain Walls in BiFeO₃

Yi Zhang, Haidong Lu, Xingxu Yan, Xiaoxing Cheng, more

Advanced Materials > 31 > 36 > n/a - n/a

Ferroelectric domain walls exhibit a number of new functionalities that are not present in their host material. One of these functional characteristics is electrical conductivity that may lead to future device applications. Although progress has been made, the intrinsic conductivity of BiFeO₃ domain walls is still elusive. Here, the intrinsic conductivity of 71° and 109° domain walls is reported by...

article

Highly Uniform Resistive Switching in HfO₂ Films Embedded with Ordered Metal Nanoisland Arrays

Jiaying Wang, Linze Li, Huaixun Huyan, Xiaoqing Pan, more

Advanced Functional Materials > 29 > 25 > n/a - n/a

Memristors enter a critical developmental stage where emerging large‐scale integration methods face major challenges with severe switching instabilities in the oxide layer. Here, the superior uniformity is achieved within HfO₂ films by embedding highly ordered metal nanoisland (NI) arrays. Embedded films exhibit a significant reduction in both SET and RESET while displaying enhanced uniformity in...

article

Control of Domain Structures in Multiferroic Thin Films through Defect Engineering

Linze Li, Jacob R. Jokisaari, Yi Zhang, Xiaoxing Cheng, more

Advanced Materials > 30 > 38 > n/a - n/a

Domain walls (DWs) have become an essential component in nanodevices based on ferroic thin films. The domain configuration and DW stability, however, are strongly dependent on the boundary conditions of thin films, which make it difficult to create complex ordered patterns of DWs. Here, it is shown that novel domain structures, that are otherwise unfavorable under the natural boundary conditions,...

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ATOMIC LAYER DEPOSITION (3)
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DOMAIN WALLS (3)
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FE–N–C (2)
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(INCREASING) CONVEX ORDER (1)
2,3,7,8-TETRACHLORODIBENZO-P-DIOXIN (TCDD) (1)
9,10-PHENANTHRAQUINONE (1)
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INFONA - science communication portal

Search results for: Xiaoqing Pan

Perovskite‐Oxide‐Based Ferroelectric Synapses Integrated on Silicon

Synergizing Fe₂O₃ Nanoparticles on Single Atom Fe‐N‐C for Nitrate Reduction to Ammonia at Industrial Current Densities

NiFe Nanoparticle Nest Supported on Graphene as Electrocatalyst for Highly Efficient Oxygen Evolution Reaction

Effect of Phosphorus Modulation in Iron Single‐Atom Catalysts for Peroxidase Mimicking

In Situ Observation of Domain Wall Lateral Creeping in a Ferroelectric Capacitor

Bifunctional Ultrathin RhRu_0.5‐Alloy Nanowire Electrocatalysts for Hydrazine‐Assisted Water Splitting

Asymmetric Exchange Interaction Induces Highly Efficient Alkaline Hydrogen Evolution in RhFe Bimetallene

Single‐Atomic Iron Doped Carbon Dots with Both Photoluminescence and Oxidase‐Like Activity

Flexoelectric Domain Walls Originated from Structural Phase Transition in Epitaxial BiVO₄ Films

Giant Thermal Transport Tuning at a Metal/Ferroelectric Interface

Overwork, job embeddedness and turnover intention among Chinese knowledge workers

Directly Probing the Local Coordination, Charge State, and Stability of Single Atom Catalysts by Advanced Electron Microscopy: A Review

An Ion‐Imprinting Derived Strategy to Synthesize Single‐Atom Iron Electrocatalysts for Oxygen Reduction

The effects of stoichiometry on the properties of exsolved Ni‐Fe alloy nanoparticles for dry methane reforming

Size‐Dependent Nickel‐Based Electrocatalysts for Selective CO₂ Reduction

Size‐Dependent Nickel‐Based Electrocatalysts for Selective CO₂ Reduction

Strong Electronic Interaction of Amorphous Fe₂O₃ Nanosheets with Single‐Atom Pt toward Enhanced Carbon Monoxide Oxidation

Intrinsic Conductance of Domain Walls in BiFeO₃

Highly Uniform Resistive Switching in HfO₂ Films Embedded with Ordered Metal Nanoisland Arrays

Control of Domain Structures in Multiferroic Thin Films through Defect Engineering

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