A5046931510- Nanoporous metals and alloys
- Electrocatalysts for Energy Conversion
- Supercapacitor Materials and Fabrication
- Gold and Silver Nanoparticles Synthesis and Applications
- Anodic Oxide Films and Nanostructures
- Nanomaterials for catalytic reactions
- Advanced Nanomaterials in Catalysis
- Pickering emulsions and particle stabilization
- Advanced battery technologies research
- Electrochemical Analysis and Applications
- Polyoxometalates: Synthesis and Applications
- Conducting polymers and applications
- Nanocluster Synthesis and Applications
- Protein Interaction Studies and Fluorescence Analysis
- Catalytic Processes in Materials Science
Hong Kong University of Science and Technology
2017-2025
University of Hong Kong
2017-2025
Georgia Institute of Technology
2025
The fabrication of monolithic nanoporous zinc bears its significance in safe and inexpensive energy storage; it can provide the much needed electrical conductivity specific area a practical alkaline battery to extend short cycle life anode. Although this type structure has been routinely fabricated by dealloying, that is, selective dissolution an alloy, not led rechargeable anode largely because need for more reactive metal as dissolving component dealloying limits choices alloy precursors....
The beauty of dealloying, i.e., the selective dissolution an alloy, lies in spontaneous formation bicontinuous nanoporous metal, whose robustness, conductivity, and high specific area are otherwise difficult to achieve a monolithic form. However, uniform structure metal requires homogeneous alloy precursor, laborious fabrication has been limiting application dealloying dealloyed materials. Here, we replace precursor with compound, design another type dissolution, reduction-induced...
Reusing nanoporous Ag sheets 20 times after simple ultrasonic cleaning for sensitive SERS detection of organochlorine pesticides.
The need for cost-effective, safe energy storage has led to unprecedentedly complex designs of materials and structures meet stringent requirements. Yet, it remains a question whether we can eventually afford the manufacturing these new at practical cost. Here, introduce approach toward an all-organic aqueous battery through one-step, solution-phase adsorption. In this battery, two quinone molecules with different redox potentials adsorb onto porous carbon electrodes serve as negative...
Abstract Nanoporous metals, a class of free‐standing, high specific‐area materials, evolve from interface‐controlled self‐organization in selective dissolution (e.g., dealloying). The process creates randomly oriented pores, which slow mass transport has limited the functional applications nanoporous metals. Here control pore orientation is demonstrated with dealloying analogy, reduction‐induced decomposition, achieved flow cells. Via forced convection, placed under sufficiently rapid to...
Abstract Membrane environments affect protein structures and functions through protein-membrane interactions in a wide range of important biological processes. To better study the effects from lipid’s hydrophilic hydrophobic interaction with on different membrane regions, we developed lipid-coated nanoporous silver sheets to provide tunable supported lipid monolayer/bilayer for situ surface-enhanced Raman vibrational spectroscopy (SERS) characterizations. Under controllable surface pressure,...
Kinetics dictates the evolution of many complex nanostructures. Among them is bi-continuous nanoporous metal, signature product dealloying that has excelled in catalysis, sensing, and energy storage with its randomly oriented, tortuous pores. However, recent reports on liquid metal have suggested a different structure, where pores align along direction dealloying, could evolve under control bulk diffusion. Here, we investigate underlying mechanism similar observation dealloying–analogy,...
Ionic transports in nanopores hold the key to unlocking full potential of bi-continuous nanoporous (NP) metals as advanced electrodes electrochemical devices. The precise control uniform NP metal structures also provides us a unique opportunity understand how complex determine at nanoscales. For Au from dealloying Ag-Au alloy, we can tune pore size range 13 nm 2.4 microns and porosity between 38% 69% via isothermal coarsening. Ag reduction-induced decomposition AgCl, additionally its...
The spontaneous formation of bi-continuous nanoporous (BNP) metal from dealloying, i.e. the selective dissolution an alloy, has fascinated generations researchers to pursue its significance in corrosion and, increasingly, catalysis. As structure possess interpenetrating pores and ligaments at length scales down a few nanometers, it provides large yet highly accessible area comprising high population surface steps; these attributes promote BNP as best catalysts for variety catalysis...
Nanoporous (NP) metals offer large surface areas in monolithic form factors, a combination desired electrocatalysis, batteries, sensing, and actuation. Their fabrication, via either the conventional method of dealloying or emerging methods such as reduction-induced decomposition (RID), requires homogeneous bulk precursors, whose preparation remains barrier to broader applications. This work explores compound powder one simplest forms precursor. With compaction sintering, we utilize range...
Bi-continuous porous metal evolves from the selective dissolution of an alloy, a process known as dealloying. Here we report similar observation in NaCl NaCl-AgCl solid solution. A procedure simultaneous quenching and that retains homogeneity solution is designed with help small-angle neutron scattering. The water creates bi-continuous AgCl smooth ligaments pores ~300 nm wide, which can coarsen up without altering morphology. Post-mortem elemental analysis identifies NaCl-compositional...