Yucheng Huang

Anhui Normal University

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Chung‐Li Dong

Tamkang University

152

Shaohua Shen

Xi'an Jiaotong University

Shuangyin Wang

Hunan University

Zhiwei Hu

Max Planck Institute for Chemical Physics of Solids

Yuqin Zou

Hunan University

Lixin Ning

Anhui Normal University

Jeng‐Lung Chen

National Synchrotron Radiation Research Center

Chi‐Liang Chen

National Synchrotron Radiation Research Center

Sufan Wang

Anhui Normal University

Ying‐Rui Lu

National Synchrotron Radiation Research Center

Cooperative Institutions

Chinese Academy of Sciences

270

University of Chinese Academy of Sciences

121

Hunan University

113

Xi'an Jiaotong University

Anhui Normal University

University of Science and Technology of China

Nanjing University

Sun Yat-sen University

Tsinghua University

State Key Laboratory of Chemobiosensing and Chemometrics

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In situ evolution of highly dispersed amorphous CoO_xclusters for oxygen evolution reaction

Nanoscale (2017)

Dawei Chen Chung‐Li Dong Yuqin Zou Dong Su Yucheng Huang

Highly-dispersed amorphous CoO_xclusters were synthesized by DBD air plasma for OER.

Oxygen evolution

10.1039/c7nr04381c

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Citations (148)

Atomically Dispersed Janus Nickel Sites on Red Phosphorus for Photocatalytic Overall Water Splitting

Angewandte Chemie International Edition (2022)

Menglong Wang Shuai Xu Zhaohui Zhou Chung‐Li Dong Xu Guo

Single-atom nickel catalysts hold great promise for photocatalytic water splitting due to their plentiful active sites and cost-effectiveness. Herein, we adopt a reactive-group guided strategy to prepare atomically dispersed nickel catalysts on red phosphorus. The hydrothermal treatment of red phosphorus leads to the formation of P-H and P-OH groups, which behave as the reactive functionalities to generate the dual structure of single-atom P-Ni and P-O-Ni catalytic sites. The produced single-atom sites provide two different functions: P-Ni for water reduction and P-O-Ni for water oxidation. Benefitting from this specific Janus structure, Ni-red phosphorus shows an elevated hydrogen evolution rate compared to Ni nanoparticle-modified red phosphorus under visible-light irradiation. The hydrogen evolution rate was additionally enhanced with increased reaction temperature, reaching 91.51 μmol h

Black Phosphorus

10.1002/anie.202204711

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Citations (70)

Defect-Rich SnO₂ Nanofiber as an Oxygen-Defect-Driven Photoenergy Shield against UV Light Cell Damage

ACS Applied Materials & Interfaces (2023)

Chun‐Yen Lai Chia-Fei Liu Tzu-Ling Lin Meiyu Chen Yucheng Huang

Usually, most studies focus on toxic gas and photosensors by using electrospinning and metal oxide polycrystalline SnO2 nanofibers (PNFs), while fewer studies discuss cell–material interactions and photoelectric effect. In this work, the controllable surface morphology and oxygen defect (VO) structure properties were provided to show the opportunity of metal oxide PNFs to convert photoenergy into bio-energy for bio-material applications. Using the photobiomodulation effect of defect-rich polycrystalline SnO2 nanofibers (PNFs) is the main idea to modulate the cell–material interactions, such as adhesion, growth direction, and reactive oxygen species (ROS) density. The VO structures, including out-of-plane oxygen defects (op-VO), bridge oxygen defects (b-VO), and in-plane oxygen defects (ip-VO), were studied using synchrotron analysis to investigate the electron transfer between the VO structures and conduction bands. These intragrain VO structures can be treated as generation-recombination centers, which can convert various photoenergies (365–520 nm) into different current levels that form distinct surface potential levels; this is referred to as the photoelectric effect. PNF conductivity was enhanced 53.6-fold by enlarging the grain size (410 nm2) by increasing the annealing temperature, which can improve the photoelectric effect. In vitro removal of reactive oxygen species (ROS) can be achieved by using the photoelectric effect of PNFs. Also, the viability and shape of human bone marrow mesenchymal stem cells (hMSCs-BM) were also influenced significantly by the photobiomodulation effect. The cell damage and survival rate can be prevented and enhanced by using PNFs; metal oxide nanofibers are no longer only environmental sensors but can also be a bio-material to convert the photoenergy into bio-energy for biomedical science applications.

Electrospinning

Photoelectric effect

10.1021/acsami.3c08926

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Citations (3)

Unveiling the Electrooxidation of Urea: Intramolecular Coupling of the N−N Bond

Angewandte Chemie International Edition (2020)

Wei Chen Leitao Xu Xiaorong Zhu Yucheng Huang Zhou Wang

Abstract The nitrogenous nucleophile electrooxidation reaction (NOR) plays a vital role in the degradation and transformation of available nitrogen. Focusing on the NOR mediated by the β‐Ni(OH) 2 electrode, we decipher the transformation mechanism of the nitrogenous nucleophile. For the two‐step NOR, proton‐coupled electron transfer (PCET) is the bridge between electrocatalytic dehydrogenation from β‐Ni(OH) 2 to β‐Ni(OH)O, and the spontaneous nucleophile dehydrogenative oxidation reaction. This theory can give a good explanation for hydrazine and primary amine oxidation reactions, but is insufficient for the urea oxidation reaction (UOR). Through operando tracing of bond rupture and formation processes during the UOR, as well as theoretical calculations, we propose a possible UOR mechanism whereby intramolecular coupling of the N−N bond, accompanied by PCET, hydration and rearrangement processes, results in high performance and ca. 100 % N 2 selectivity. These discoveries clarify the evolution of nitrogenous molecules during the NOR, and they elucidate fundamental aspects of electrocatalysis involving nitrogen‐containing species.

10.1002/anie.202015773

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Citations (329)

Utilizing ion leaching effects for achieving high oxygen-evolving performance on hybrid nanocomposite with self-optimized behaviors

Nature Communications (2020)

Daqin Guan Gihun Ryu Zhiwei Hu Jing Zhou Chung‐Li Dong

Abstract Ion leaching from pure-phase oxygen-evolving electrocatalysts generally exists, leading to the collapse and loss of catalyst crystalline matrix. Here, different from previous design methodologies of pure-phase perovskites, we introduce soluble BaCl 2 and SrCl 2 into perovskites through a self-assembly process aimed at simultaneously tuning dual cation/anion leaching effects and optimizing ion match in perovskites to protect the crystalline matrix. As a proof-of-concept, self-assembled hybrid Ba 0.35 Sr 0.65 Co 0.8 Fe 0.2 O 3- δ (BSCF) nanocomposite (with BaCl 2 and SrCl 2 ) exhibits the low overpotential of 260 mV at 10 mA cm -2 in 0.1 M KOH. Multiple operando spectroscopic techniques reveal that the pre-leaching of soluble compounds lowers the difference of interfacial ion concentrations and thus endows the host phase in hybrid BSCF with abundant time and space to form stable edge/face-sharing surface structures. These self-optimized crystalline structures show stable lattice oxygen active sites and short reaction pathways between Co–Co/Fe metal active sites to trigger favorable adsorption of OH − species.

Overpotential

10.1038/s41467-020-17108-5

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Citations (170)

Density Functional Theory Investigation of Structure–Activity Relationship for Efficient Electrochemical CO₂ Reduction on Defective SnSe₂ Nanosheets

ACS Applied Nano Materials (2021)

Yao Luo Yu Cui Mengyuan Li Xiaoli Zhang Yuxin Dai

Developing efficient strategies to optimize the performance of electrocatalysts is essential for practical applications of electrochemical CO2 reduction, which, however, remains a great challenge. In this work, by means of density functional theory calculations, we report a surface defect-size engineering strategy to optimize the catalytic activity of two-dimensional SnSe2 nanosheets for CO2 reduction. Our results show that the basal plane of SnSe2 can be activated through the formation of an Se vacancy, where the CO2 can be efficiently captured and reduced into CH4 with a low limiting potential of −0.58 V. In addition, a structure–activity relationship has been established, which shows that the limiting potential can be further reduced by adopting external strain to tailor the Se vacancy to an optimal size. This work not only highlights a very promising catalyst for CO2 reduction but also provides an efficient way to tailor the catalysts to achieve enhanced activities and high selectivity.

Limiting

Basal plane

10.1021/acsanm.0c03405

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Citations (7)

Regulation on polymerization degree and surface feature in graphitic carbon nitride towards efficient photocatalytic H2 evolution under visible-light irradiation

Journal of Material Science and Technology (2021)

Cheng Cheng Chung‐Li Dong Jinwen Shi Liuhao Mao Yucheng Huang

Graphitic carbon nitride

Degree of polymerization

Visible spectrum

Carbon nitride

10.1016/j.jmst.2021.05.019

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Citations (51)

A Multi-Step Incremental Analog-to-Digital Converter With a Single Opamp and Two- Capacitor SAR Extended Counting

IEEE Transactions on Circuits and Systems I Regular Papers (2021)

Shih-Che Kuo Jiasheng Huang Yucheng Huang Chia-Wei Kao Che-Wei Hsu

This work describes a hybrid incremental ADC (IADC) with two-capacitor (2-C) successive-approximation registers (SAR) extended counting in two-step operation to achieve high resolution data conversion. The circuits in the first step is acting as a first-order incremental analog-to-digital converter (IADC). Finite impulse response (FIR) DAC is incorporated in the loop filter to reduce the transient voltage step. It is reconfigured as a 2-C SAR to perform extended counting technique in the second step. Only one opamp is re-used in both steps. The hardware is prototyped in 0.18 μm CMOS technology, and the hybrid ADC accomplishes a measured DR / SNR / SNDR of 100.2 / 97.1 / 96.6 dB and an input signal bandwidth of 1.2 kHz. Operated at 1.5-V, it consumes 33.2 μW, and this achieves a Walden figure-of-merit (FoM) of 0.25 pJ/conversion-step and Schreier FoM of 175.8 dB.

Successive approximation ADC

Switched capacitor

Finite impulse response

Shaping

10.1109/tcsi.2021.3077735

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Citations (11)

Stabilities, Electronic and Optical Properties of SnSe_2(1–x)S_2x Alloys: A First-Principles Study

The Journal of Physical Chemistry C (2016)

Yucheng Huang Xi Chen Danmei Zhou Hai Liu Chan Wang

First-principles investigations are performed on the stabilities and electronic and optical properties of SnSe2(1–x)S2x (x = 0.0625, 0.25, 0.5, 0.625, 0.8125, and 1.0) monolayer alloys by using density functional theory calculations. It is found that, above a critical temperature of 702 K, the mixing of SnSe2 and SnS2 is likely to form random alloys. The calculated negative substitution energy of S at the Se site of SnSe2 suggests an alternative strategy for the synthesis of the alloys, i.e., by the substitution of S for Se in SnSe2 monolayers. It is also shown that, due to the lattice mismatch and the pronounced charge transfer between SnSe2 and SnS2, the band-gap values of the alloys deviate strongly from the concentration-averaged values of the constituents. Moreover, the dielectric functions of the alloys are determined to be anisotropic, with optical properties along the xy plane being more susceptible to the S content than those along the z direction, and the alloying enhances the absorption strength in the visible spectral region. We hope that these insights will be useful for future applications of SnSe2(1–x)S2x alloys.

Lattice (music)

Lattice constant

10.1021/acs.jpcc.6b00794

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Citations (46)

Zhang-Rice singlets state formed by two-step oxidation for triggering water oxidation under operando conditions.xlsx

Figshare (2023)

Chun‐Kuo Peng Yu‐Chang Lin Chao‐Lung Chiang Zhengxin Qian Yucheng Huang

Zhang-Rice singlets state formed by two-step oxidation for triggering water oxidation under operando conditions

Oxidation state

10.6084/m9.figshare.21890511.v1

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Citations (0)