A5003033013- Catalytic Processes in Materials Science
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Catalysis and Oxidation Reactions
- Nanomaterials for catalytic reactions
- Advanced Battery Materials and Technologies
- Advancements in Battery Materials
- Carbon dioxide utilization in catalysis
- CO2 Reduction Techniques and Catalysts
- Catalysis for Biomass Conversion
- Asymmetric Hydrogenation and Catalysis
- Supercapacitor Materials and Fabrication
- Fuel Cells and Related Materials
- Catalysis and Hydrodesulfurization Studies
- Ammonia Synthesis and Nitrogen Reduction
- Catalysts for Methane Reforming
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Electrochemical Analysis and Applications
- Advanced Photocatalysis Techniques
- Advanced Battery Technologies Research
- Hydrogen Storage and Materials
- Zeolite Catalysis and Synthesis
- Metal-Organic Frameworks: Synthesis and Applications
- Synthesis and characterization of novel inorganic/organometallic compounds
Max Planck Institute for Chemical Energy Conversion
2022-2025
University College London
2018-2024
Institute of Catalysis and Petrochemistry
2021
Transnational Press London
2019
Peking University
2015-2017
Beijing National Laboratory for Molecular Sciences
2015-2017
State Key Laboratory of Rare Earth Materials Chemistry and Application
2015-2017
University of Hong Kong
2015-2017
Central South University
2012
Abstract Cost‐effective and environment‐friendly aqueous zinc‐ion batteries (AZIBs) exhibit tremendous potential for application in grid‐scale energy storage systems but are limited by suitable cathode materials. Hydrated vanadium bronzes have gained significant attention AZIBs can be produced with a range of different pre‐intercalated ions, allowing their properties to optimized. However, gaining detailed understanding the mechanisms within these materials remains great challenge due...
A detrimental competition between the urea oxidation reaction (UOR) and oxygen evolution is identified. Strategies are proposed to alleviate such boost performance of UOR other organic compound reactions.
Abstract Layered manganese oxides adopting pre‐accommodated cations have drawn tremendous interest for the application as cathodes in aqueous zinc‐ion batteries (AZIBs) owing to their open 2D channels fast ion‐diffusion and mild phase transition upon topochemical (de)intercalation processes. However, it is inevitable see these “pillar” leaching from hosts loose interaction with negatively charged Helmholtz planes within shearing/bulking effects structures guest species (de)intercalation,...
Abstract Rational design of low‐cost and efficient transition‐metal catalysts for low‐temperature CO 2 activation is significant poses great challenges. Herein, a strategy via regulating the local electron density active sites developed to boost methanation that normally requires >350 °C commercial Ni catalysts. An optimal Ni/ZrO catalyst affords an excellent performance hitherto, with conversion 84.0 %, CH 4 selectivity 98.6 % even at 230 GHSV 12,000 mL g −1 h 106 h, reflecting one best...
Large spin-orbit coupling (SOC) is an intrinsic property of the heavy elements that directly affects electronic structures compounds. In this work, we report synthesis and characterization a monocoordinate bismuthinidene features rigid bulky ligand. All magnetic measurements [superconducting quantum interference device (SQUID), nuclear resonance (NMR)] point to diamagnetic compound. However, multiconfigurational chemical calculations predict ground state compound be dominated (76%) by spin...
This research reports the presence of a synergistic effect among vacancies, lattice water and nickel ions on enhancing hydrated protons hopping via Grotthuss mechanism for high performance zinc ion battery cathodes.
Abstract Ammonia is a storage molecule for hydrogen, which can be released by catalytic decomposition. Inexpensive iron catalysts suffer from low activity due to too strong iron-nitrogen binding energy compared more active metals such as ruthenium. Here, we show that this limitation overcome combining with cobalt resulting in Fe-Co bimetallic catalyst. Theoretical calculations confirm lower metal-nitrogen the catalyst higher activity. Operando spectroscopy reveals role of suppress...
Multi-site catalysis of high-entropy hydroxides for co-production glucaric acid and ammonia.
The first study on relationship between the cation pre-intercalation amount in MnO<sub>2</sub> matrix and electrochemical performances of AZIBs are provided.
Abstract Supported atomic metal sites have discrete molecular orbitals. Precise control over the energies of these is key to achieving novel reaction pathways with superior selectivity. Here, we achieve selective oxygen (O 2 ) activation by utilising a framework cerium (Ce) cations reduce energy 3 d orbitals isolated copper (Cu) sites. Operando X-ray absorption spectroscopy, electron paramagnetic resonance and density-functional theory simulations are used demonstrate that [Cu(I)O ] 3− site...
Due to their excellent anti-oxidation performance, CeO2 nanoparticles receive wide attention in pharmacological application. Deep understanding of the mechanism is extremely important develop potent nanomaterials for Here, we report a detailed study on process nanoparticles. The valence state and coordination structure Ce are characterized before after addition H2O2 understand Adsorbed peroxide species detected during process, which responsible red-shifted UV-vis absorption spectra...
Understanding and tuning the catalytic properties of metals atomically dispersed on oxides are major stepping-stones toward a rational development single-atom catalysts (SACs). Beyond individual showcase studies, design synthesis structurally regular series SACs opens door to systematic experimental investigations performance as function metal identity. Herein, based various 4d (Ru, Rh, Pd) 5d (Ir, Pt) transition has been synthesized common MgO carrier. Complementary (X-ray absorption...
Layered hydroxides have shown superior catalytic activity for the electrocatalytic organic compound oxidation reaction. However, metal leaching can lead to uncontrollable structural phase transformation. Here, we report a Cr-Ni(OH)2 electrocatalyst as model of pre-catalyst identification structure-performance relationship. The optimized delivered superb performances, i.e., low potential 1.38 V (versus reversible hydrogen electrode [RHE]) reach 100 mA cm−2 and stable over 200 h at 10 cm−2. In...
Abstract A stable cathode–electrolyte interface (CEI) is crucial for aqueous zinc‐ion batteries (AZIBs), but it less investigated. Commercial binder poly(vinylidene fluoride) (PVDF) widely used without scrutinizing its suitability and cathode‐electrolyte in AZIBs. water‐soluble developed that facilitated the situ formation of a CEI protecting layer tuning interfacial morphology. By combining polysaccharide sodium alginate (SA) with hydrophobic polytetrafluoroethylene (PTFE), surface...
The role of single atomic Ru site for enhanced UOR performance.
Abstract The electrochemical synthesis of hydrogen peroxide (H 2 O ) via a two‐electron (2 e − oxygen reduction reaction (ORR) process provides promising alternative to replace the energy‐intensive anthraquinone process. Herein, we develop facile template‐protected strategy synthesize highly active quinone‐rich porous carbon catalyst for H production. optimized PCC 900 material exhibits remarkable activity and selectivity, which onset potential reaches 0.83 V vs. reversible electrode in 0.1...
Abstract Electrocatalytic oxygen reduction reaction (ORR) has been intensively studied for environmentally benign applications. However, insufficient understanding of ORR 2 e − ‐pathway mechanism at the atomic level inhibits rational design catalysts with both high activity and selectivity, causing concerns including catalyst degradation due to Fenton or poor efficiency H O electrosynthesis. Herein we show that generally accepted electrocatalyst based on a Sabatier volcano plot argument...
Reconstruction-engineered electrocatalysts with enriched high active Ni species for urea oxidation reaction (UOR) have recently become promising candidates energy conversion. However, to inhibit the over-oxidation of brought by valence state Ni, tremendous efforts are devoted obtaining low-value products nitrogen gas avoid toxic nitrite formation, undesirably causing inefficient utilization cycle. Herein, we proposed a mediation engineering strategy significantly boost high-value formation...
Abstract Electrochemical hydrogen peroxide (H 2 O ) production (EHPP) via a two-electron oxygen reduction reaction (2e - ORR) provides promising alternative to replace the energy-intensive anthraquinone process. M-N-C electrocatalysts, which consist of atomically dispersed transition metals and nitrogen-doped carbon, have demonstrated considerable EHPP efficiency. However, their full potential, particularly regarding correlation between structural configurations performances in neutral...
Abstract Efficient methanation of CO 2 relies on the development more selective and stable heterogeneous catalysts. Herein, we present a simple effective method to encapsulate Ni nanoparticles in zeolite silicalite‐1. In this method, is modified by desilication, which creates intraparticle voids mesopores that facilitate formation small well‐dispersed upon impregnation reduction. Transmission electron microscopy X‐ray photoelectron spectroscopy analyses confirm significant part are situated...
Synthesis of a highly efficient HER catalyst with low Pt that exceeds the efficiency commercial 20 wt% Pt/C.
Ruthenium nanoparticles (NPs) immobilized on imidazolium-based supported ionic liquid phases (Ru@SILP) act as effective heterogeneous catalysts for the hydrogenation of carbon dioxide (CO2 ) to formate in a mixture water and triethylamine (NEt3 ). The structure molecular modifiers is varied systematically regarding side chain functionality (neutral, basic, acidic) anion assess influence IL-type environment NPs synthesis catalytic properties. resulting Ru@SILP materials contain well-dispersed...
Abstract In this study we show that using AuPd nanoparticles supported on a commercial titanium silicate (TS‐1) prepared wet co‐impregnation method it is possible to produce hydrogen peroxide from molecular H 2 and O via the direct synthesis reaction. The effect of Au: Pd ratio calcination temperature evaluated as well role Pt addition catalysts. AuPt observed result in significant improvement catalytic activity selectivity with detailed characterisation indicating selectively tuning...
Abstract Electronic metal–support interactions (EMSI) describe the electron flow between metal sites and a oxide support. It is generally used to follow mechanism of redox reactions. In this study CuO‐CeO 2 redox, an additional electrons from metallic Cu surface carbon species observed via combination operando X‐ray absorption spectroscopy, synchrotron powder diffraction, near ambient pressure edge fine structure diffuse reflectance infrared Fourier transform spectroscopy. An electronic...