A5100607750- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Ionic liquids properties and applications
- Embedded Systems Design Techniques
- Graphene research and applications
- Carbon Nanotubes in Composites
- Catalytic Processes in Materials Science
- Advanced Photocatalysis Techniques
- Real-Time Systems Scheduling
- Parallel Computing and Optimization Techniques
- Advanced Sensor and Energy Harvesting Materials
- Advanced battery technologies research
- Diamond and Carbon-based Materials Research
- Thermal properties of materials
- Hydrogen Storage and Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Semiconductor materials and devices
- Electrochemical Analysis and Applications
- Catalysts for Methane Reforming
- Metal and Thin Film Mechanics
- Fuel Cells and Related Materials
- Covalent Organic Framework Applications
- Carbon dioxide utilization in catalysis
- Nanomaterials for catalytic reactions
- Advanced Thermoelectric Materials and Devices
Seoul National University
2002-2024
University of Pennsylvania
2023-2024
Stanford University
2020-2023
Lawrence Berkeley National Laboratory
2017-2022
University of California, Berkeley
2014-2022
Interface (United States)
2021
Samsung (South Korea)
2011-2018
Sungkyunkwan University
2017
Kavli Energy NanoScience Institute
2015-2017
Kongju National University
2016
Improving cobalt catalysts Tethering molecular together is a tried and trusted method for making them easier to purify reuse. Lin et al. now show that the assembly of covalent organic framework (COF) structure can also improve fundamental catalytic performance. They used porphyrin complexes as building blocks COF. The resulting material showed greatly enhanced activity aqueous electrochemical reduction CO 2 CO. Science , this issue p. 1208
A key challenge in the field of electrochemical carbon dioxide reduction is design catalytic materials featuring high product selectivity, stability, and a composition earth-abundant elements. In this work, we introduce thin films nanosized metal-organic frameworks (MOFs) as atomically defined nanoscopic that function catalysts for efficient selective to monoxide aqueous electrolytes. Detailed examination cobalt-porphyrin MOF, Al2(OH)2TCPP-Co (TCPP-H2 =...
The apparent incongruity between the increasing consumption of fuels and chemicals finite amount resources has led us to seek means maintain sustainability our society. Artificial photosynthesis, which utilizes sunlight create high-value from abundant resources, is considered as most promising viable method. This Minireview describes progress challenges in field artificial photosynthesis terms its key components: developments photoelectrochemical water splitting recent electrochemical CO2...
Precise control of elemental configurations within multimetallic nanoparticles (NPs) could enable access to functional nanomaterials with significant performance benefits. This can be achieved down the atomic level by disorder-to-order transformation individual NPs. Here, systematically controlling ordering degree, we show that transformation, applied AuCu NPs, activates them perform as selective electrocatalysts for CO2 reduction. In contrast disordered alloy NP, which is catalytically...
Materials development for artificial photosynthesis, in particular, CO2 reduction, has been under extensive efforts, ranging from inorganic semiconductors to molecular complexes. In this report, we demonstrate a metal–organic framework (MOF)-coated nanoparticle photocatalyst with enhanced reduction activity and stability, which stems having two different functional units enhancement catalytic stability combined together as single construct. Covalently attaching CO2-to-CO conversion...
Significance Electrochemical conversion of CO 2 to carbon-based products, which can be used directly as fuels or indirectly fuel precursors, is suggested one the promising solutions for sustainability. Not only does this process allow using renewables such solar electricity energy input, but emitted from consumption recycled back into fuels. The success technology depends on value added product that forms , and therefore it important facilitate multicarbon generation. This work presents a...
Copper is uniquely active for the electrocatalytic reduction of carbon dioxide (CO2) to products beyond monoxide, such as methane (CH4) and ethylene (C2H4). Therefore, understanding selectivity trends CO2 electrocatalysis on copper surfaces critical developing more efficient catalysts conversion higher order products. Herein, we investigate activity ultrathin (diameter ∼20 nm) 5-fold twinned nanowires (Cu NWs) reduction. These Cu NW were found exhibit high CH4 over other products, reaching...
Conversion of the greenhouse gas carbon dioxide (CO2) to value-added products is an important challenge for sustainable energy research, and nanomaterials offer a broad class heterogeneous catalysts such transformations. Here we report molecular surface functionalization approach tuning gold nanoparticle (Au NP) electrocatalysts reduction CO2 CO. The N-heterocyclic (NHC) carbene-functionalized Au NP catalyst exhibits improved faradaic efficiency (FE = 83%) CO in water at neutral pH...
Using renewable energy to recycle CO2 provides an opportunity both reduce net emissions and synthesize fuels chemical feedstocks. It is of central importance design electrocatalysts that are efficient can access a tunable spectrum products. Syngas, mixture carbon monoxide (CO) hydrogen (H2), important precursor be converted downstream into small molecules or larger hydrocarbons by fermentation thermochemistry. Many processes utilize syngas require different compositions: we therefore pursued...
Platinum-based alloys are known to demonstrate advanced properties in electrochemical reactions that relevant for proton exchange membrane fuel cells and electrolyzers. Further development of Pt alloy electrocatalysts relies on the design architectures with highly active surfaces optimized utilization expensive element, Pt. Here, we show three-dimensional anisotropy Pt–Ni rhombic dodecahedra can be tuned by controlling ratio between Ni precursors such either a completely hollow nanoframe or...
Abstract Within the breath lie numerous health indicators, encompassing respiratory patterns and biomarkers extending beyond conditions to cardiovascular health. Recently, emergence of SARS-CoV-2 pandemic has not only underscored necessity on-the-spot analysis but also normalized use masks in everyday life. Simultaneously, rapid evolution wearable technology given rise innovative healthcare monitoring tools, with a specific emphasis on sensors. This review explores current research trends...
Copper nanowire networks are considered a promising alternative to indium tin oxide as transparent conductors. The fast degradation of copper in ambient conditions, however, largely overshadows their practical applications. Here, we develop the synthesis ultrathin Cu@Au core–shell nanowires using trioctylphosphine strong binding ligand prevent galvanic replacement reactions. epitaxial overgrowth gold shell with few atomic layers on surface can greatly enhance resistance heat (80 °C),...
Within the last several years, metal halide perovskites such as methylammonium lead iodide, CH3NH3PbI3, have come to forefront of scientific investigation defect-tolerant, solution-processable semiconductors that exhibit excellent optoelectronic properties. The vast majority study has focused on Pb-based perovskites, which limited applications because their inherent toxicity. To enable broad application these materials, properties lead-free must be explored. Here, two-dimensional, cesium tin...
Reducing carbon dioxide with a multicomponent artificial photosynthetic system, closely mimicking nature, represents promising approach for energy storage. Previous works have focused on exploiting light-harvesting semiconductor nanowires (NW) photoelectrochemical water splitting. With the newly developed CO2 reduction nanoparticle (NP) catalysts, direct interfacing of these nanocatalysts NW light absorbers becomes feasible. Here, we demonstrate directed assembly NP catalysts vertical...
Significance The electrocatalytic conversion of CO 2 to value-added products, especially valuable multicarbon is a pathway toward sustainable formation chemicals and fuels typically derived from fossil fuels, while mitigating emissions. Fundamental understanding development more efficient catalysts for this reaction require deep investigation into structures with high intrinsic activity, which are limited at present. This work comprehensively investigates dynamic copper nanoparticle ensemble...
Abstract The potential of the electrospun nanofiber membrane (ENM)‐based soft electronics in epidermal bioelectronics has gained huge attention with their conformal compatibility human body and associated performance improvements. This study presents a novel filtration‐based direct local nanowire patterning method on ENM using dispenser systems, aiming to fabricate stretchable, breathable, highly conductive harnessing various types metal nanowires, including Ag, Ag@Au core–shell, Ag@(Au–Pt)...
Abstract Angesichts der Unvereinbarkeit eines zunehmenden Verbrauchs von Kraftstoffen und chemischen Produkten einer nur endlichen Menge an Ressourcen versuchen wir Möglichkeiten zu finden, wie unsere Gesellschaft auf Dauer nachhaltig gestalten können. Die künstliche Photosynthese nutzt das Sonnenlicht, um reichlich vorhandene in hochwertige Chemikalien umzuwandeln. Deshalb gilt sie als die aussichtsreichste Methode. Hier werden Entwicklungen neueste Fortschritte sowie noch bestehende...
The microenvironment in which the catalysts are situated is as important active sites determining overall catalytic performance. Recently, it has been found that nanoparticle (NP) surface ligands can actively participate creating a favorable microenvironment, part of nanoparticle/ordered-ligand interlayer (NOLI), for selective CO2 conversion. However, much ligand-ligand interactions presumed essential to formation such remains be understood. Here, by varying initial size NPs and utilizing...