A5002406514- Electrocatalysts for Energy Conversion
- Advanced Photocatalysis Techniques
- CO2 Reduction Techniques and Catalysts
- Copper-based nanomaterials and applications
- Ionic liquids properties and applications
- TiO2 Photocatalysis and Solar Cells
- ZnO doping and properties
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Quantum Dots Synthesis And Properties
- Machine Learning in Materials Science
- Transition Metal Oxide Nanomaterials
- Fuel Cells and Related Materials
- Chalcogenide Semiconductor Thin Films
- Magnetic and transport properties of perovskites and related materials
- Electronic and Structural Properties of Oxides
- Iron oxide chemistry and applications
- MXene and MAX Phase Materials
- Semiconductor materials and devices
- Nanomaterials for catalytic reactions
- nanoparticles nucleation surface interactions
- Electrochemical Analysis and Applications
- Advanced Thermoelectric Materials and Devices
- 2D Materials and Applications
- Ga2O3 and related materials
Sun Yat-sen University
2020-2025
University of British Columbia
2015-2021
Vancouver Biotech (Canada)
2018-2020
National University of Defense Technology
2017
National Synchrotron Radiation Laboratory
2009-2016
University of Science and Technology of China
1998-2016
Chengdu University of Information Technology
2011
Cornell University
1998
Tokyo Medical and Dental University
1998
Tokai University
1998
Outstanding magnetic properties are highly desired for two-dimensional ultrathin semiconductor nanosheets. Here, we propose a phase incorporation strategy to induce robust room-temperature ferromagnetism in nonmagnetic MoS2 semiconductor. A two-step hydrothermal method was used intentionally introduce sulfur vacancies 2H-MoS2 nanosheet host, which prompts the transformation of surrounding local lattice into trigonal (1T-MoS2) phase. 25% 1T-MoS2 nanosheets can enhance electron carrier...
Endowing transition-metal oxide electrocatalysts with high water oxidation activity is greatly desired for production of clean and sustainable chemical fuels. Here, we present an atomically thin cobalt oxyhydroxide (γ-CoOOH) nanosheet as efficient electrocatalyst oxidation. The 1.4 nm thick γ-CoOOH can effectively oxidize extraordinarily large mass activities 66.6 A g(-1), 20 times higher than that bulk 2.4 the benchmarking IrO2 electrocatalyst. Experimental characterizations...
Manipulation at the atomic level: Freestanding SnS2 single-layers with three atom thickness were synthesized through an exfoliation strategy (see picture). The have increased density of states valence band edge. A photoelectrode made from this material shows a visible-light conversion efficiency 38.7 % that is superior to most existing reports. Detailed facts importance specialist readers are published as ”Supporting Information”. Such documents peer-reviewed, but not copy-edited or typeset....
The conversion of CO2 to CO is demonstrated in an electrolyzer flow cell containing a bipolar membrane at current densities 200 mA/cm2 with Faradaic efficiency 50%. Electrolysis was carried out by delivering gaseous the cathode silver catalyst integrated carbon-based gas diffusion layer. Nonprecious nickel foam strongly alkaline electrolyte (1 M NaOH) used mediate anode reaction. While configuration where and were separated only found be unfavorable for robust reduction, modified...
In this review, we discuss the merits and major challenges of p-type binary ternary Cu-based metal oxide photocathodes present latest research effort in modifying materials towards high-performance photocathodes.
There is a global effort to convert sunlight into fuels by photoelectrochemically splitting water form hydrogen fuels, but the dioxygen byproduct bears little economic value. This raises important question of whether higher value commodities can be produced instead dioxygen. We report here photoelectrochemistry at BiVO4 photoanode involving oxidation substrates in organic media. The use MeCN enables broader set chemical transformations performed (e.g., alcohol and C-H activation/oxidation),...
The combination of Cu and Ag presents a promising way to steer the CO2 reduction products through regulating surface active sites. However, difficulty in forming CuAg alloy with controllable atomic ratio impedes in-depth understanding structure-activity relationship catalysts. Herein, we use E-beam evaporation synthesize series films uniform distribution stoichiometry reveal real reaction mechanism on for electrochemical process. Compared Cu, Cu1-xAgx (x = 0.05-0.2) showed an apparent...
Abstract The utilization of CO 2 as a feedstock requires fundamental breakthroughs in catalyst design. efficiencies and activities pure metal electrodes towards the reduction reaction are established, but corresponding data on mixed‐metal systems not well developed. In this study we show that near‐infrared driven decomposition (NIRDD) solution‐deposited films salts subsequent electrochemical offers unique opportunity to form an array electrocatalyst coatings with excellent control...
The synthesis of atomically thin transition-metal oxide nanosheets as a conceptually new class materials is significant for the development next-generation electronic and magnetic nanodevices but remains fundamental chemical physical challenge. Here, based on "template-assisted oriented growth" strategy, we successfully synthesized half-unit-cell typical α-Fe2O3 that show robust intrinsic ferromagnetism 0.6 μB/atom at 100 K remain ferromagnetic room temperature. A unique surface structure...
Abstract Endowing transition‐metal oxide electrocatalysts with high water oxidation activity is greatly desired for production of clean and sustainable chemical fuels. Here, we present an atomically thin cobalt oxyhydroxide (γ‐CoOOH) nanosheet as efficient electrocatalyst oxidation. The 1.4 nm thick γ‐CoOOH can effectively oxidize extraordinarily large mass activities 66.6 A g −1 , 20 times higher than that bulk 2.4 the benchmarking IrO 2 electrocatalyst. Experimental characterizations...
The distribution and flow of water in a CO<sub>2</sub> electrolyzer can be defined at variable operating conditions using 3D model coupled with an analytical electrolyzer.
Abstract Exposure of BiVO 4 photoanodes to ultraviolet (UV) radiation for extended time periods (e.g., 20 h) produces a morphological change and concomitant improvement in photo‐electrocatalytic (PEC) efficiency driving water splitting directly by sunlight. The ∼230 mV cathodic shift onset potential doubling the photocurrent at 1.23 V vs. RHE after UV curing are comparable effects engendered presence secondary catalyst layer. PEC measurements absorption spectra indicate that corresponds...
Electrochemical reduction of CO2 into carbon-based products using excess clean electricity is a compelling method for producing sustainable fuels while lowering emissions. Previous electrolytic studies all involve dioxygen production at the anode, yet this anodic reaction requires large overpotential and yields product bearing no economic value. We report here that cathodic to CO can occur in tandem with oxidation organic substrates bear higher value than dioxygen. This claim demonstrated by...
Abstract The electrochemical reduction of CO 2 (eCO RR) that exclusively produces one product at industrial current density is crucial for the substantial storage renewable energy. Modulating electronic structure atomically dispersed catalysts can effectively regulate adsorption rate‐determining‐step intermediates to achieve desired products. Here, study constructs a hybrid catalyst consisting single Ag atoms and atomic clusters supported on nitrogen‐doped multi‐walled carbon nanotubes...
Manipulation auf atomarer Ebene: Drei Atome dicke Zinndisulfid-Einzelschichten wurden durch Abblättern hergestellt (siehe Bild). Die SnS2-Schichten haben eine größere Zustandsdichte an der Valenzbandkante. Eine Photoelektrode aus diesem Material erreicht bei Umwandlung von sichtbarem Licht einen Wirkungsgrad 38.7 %, höher ist als die meisten veröffentlichten Werte. Detailed facts of importance to specialist readers are published as "Supporting Information". Such documents peer-reviewed, but...
Here we report a study to improve the solar water splitting activity of TiO2 photoanodes by tuning porosity nanotube arrays. Through modifying electrochemical anodization conditions, average wall thickness and inner diameter synthesized arrays were controlled in range 8–20 nm 40–145 nm, respectively, corresponding variation from 47.1% 75.7%. The photoelectrochemical (PEC) measurements demonstrate that sample with maximum (75.7%) shows peak ultraviolet conversion efficiency 7.02%. Further...
Atomic-level design and construction of synergistic active centers are central to develop advanced oxygen electrocatalysts toward efficient energy conversion. Herein, an in situ strategy introduce flexible redox sites VNi onto Ni-based metal-organic framework (MOF) nanosheet arrays (NiV-MOF NAs) as a promising electrocatalyst is developed. The abundant with metal valence states V+3/+4/+5 Ni+3/+2 enable NiV-MOF NAs excellent evolution reaction (OER) activity long-term stability under high...
To efficiently transform absorbed photons to chemical energy is highly desired for the full utilization of visible light in solar hydrogen generation process. Here, a active photoanode consisting thin NixFe2–xO3 overlayer on surface hematite nanotube has been constructed raise photoexcited carriers by Fe2O3 spectrum. We find that obtained photoanodes promote charge migration photogenerated surface, accelerating oxygen evolution and avoiding low-energy holes recombination at...
This work reviews the recent advances of pre-catalysts for CO 2 reduction reaction (CO RR) research. The important factors that may be responsible improvement RR performance are categorized and a perspective is also presented.