A5084180515- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Fuel Cells and Related Materials
- CO2 Reduction Techniques and Catalysts
- Advanced Photocatalysis Techniques
- Electrochemical Analysis and Applications
- Ammonia Synthesis and Nitrogen Reduction
- Advanced Battery Materials and Technologies
- Catalytic Processes in Materials Science
- Ionic liquids properties and applications
- Advancements in Battery Materials
- Nanomaterials for catalytic reactions
- Advanced Nanomaterials in Catalysis
- Carbon dioxide utilization in catalysis
- Supercapacitor Materials and Fabrication
- Electrochemical sensors and biosensors
- Advanced biosensing and bioanalysis techniques
- Metamaterials and Metasurfaces Applications
- Nanopore and Nanochannel Transport Studies
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Thermoelectric Materials and Devices
- Advanced Memory and Neural Computing
- Magnetic and transport properties of perovskites and related materials
- Spectroscopy and Quantum Chemical Studies
- Copper-based nanomaterials and applications
Argonne National Laboratory
2019-2025
Oregon State University
2017-2024
Jilin Academy of Agricultural Machinery
2024
Florida Institute of Technology
2024
Washington University in St. Louis
2024
Jiangxi Normal University
2024
University of California, Riverside
2024
Zero to Three
2021
China Railway Group (China)
2021
Corvallis Environmental Center
2019-2020
It remains a grand challenge to replace platinum group metal (PGM) catalysts with earth-abundant materials for the oxygen reduction reaction (ORR) in acidic media, which is crucial large-scale deployment of proton exchange membrane fuel cells (PEMFCs). Here, we report high-performance atomic Fe catalyst derived from chemically Fe-doped zeolitic imidazolate frameworks (ZIFs) by directly bonding ions ligands within 3D frameworks. Although ZIF was identified as promising precursor, new...
Due to the Fenton reaction, presence of Fe and peroxide in electrodes generates free radicals causing serious degradation organic ionomer membrane. Pt-free Fe-free cathode catalysts therefore are urgently needed for durable inexpensive proton exchange membrane fuel cells (PEMFCs). Herein, a high-performance nitrogen-coordinated single Co atom catalyst is derived from Co-doped metal-organic frameworks (MOFs) through one-step thermal activation. Aberration-corrected electron microscopy...
Restructuring-induced catalytic activity is an intriguing phenomenon of fundamental importance to rational design high-performance catalyst materials. We study three copper-complex materials for electrocatalytic carbon dioxide reduction. Among them, the copper(II) phthalocyanine exhibits by far highest yielding methane with a Faradaic efficiency 66% and partial current density 13 mA cm−2 at potential – 1.06 V versus reversible hydrogen electrode. Utilizing in-situ operando X-ray absorption...
Abstract Single atom catalyst, which contains isolated metal atoms singly dispersed on supports, has great potential for achieving high activity and selectivity in hetero-catalysis electrocatalysis. However, the stability of single their interaction with support still remains a mystery. Here we show stable atomic ruthenium catalyst anchoring surface cobalt iron layered double hydroxides, possesses strong electronic coupling between hydroxides. With 0.45 wt.% loading, exhibits outstanding...
Abstract Formic acid (or formate) is suggested to be one of the most economically viable products from electrochemical carbon dioxide reduction. However, its commercial viability hinges on development highly active and selective electrocatalysts. Here we report that structural defects have a profound positive impact electrocatalytic performance bismuth. Bismuth oxide double-walled nanotubes with fragmented surface are prepared as template, cathodically converted defective bismuth nanotubes....
Engineering single-atom electrocatalysts with high-loading amount holds great promise in energy conversion and storage application. Herein, we report a facile economical approach to achieve an unprecedented high loading of single Ir atoms, up ∼18wt%, on the nickel oxide (NiO) matrix as electrocatalyst for oxygen evolution reaction (OER). It exhibits overpotential 215 mV at 10 mA cm-2 remarkable OER current density alkaline electrolyte, surpassing NiO IrO2 by 57 times 46 1.49 V vs RHE,...
Herein, we report the exploration of understanding reactivity and structure atomically dispersed M–N4 (M = Fe Co) sites for CO2 reduction reaction (CO2RR). Nitrogen coordinated or Co site into carbons (M–N–C) containing bulk- edge-hosted coordination were prepared by using Fe- Co-doped metal–organic framework precursors, respectively, which further studied as ideal model catalysts. is intrinsically more active than in to CO, terms a larger current density higher CO Faradaic efficiency (FE)...
Exploring materials with regulated local structures and understanding how the atomic motifs govern reactivity durability of catalysts are a critical challenge for designing advanced catalysts. Herein we report tuning structure nickel-iron layered double hydroxides (NiFe-LDHs) by partially substituting Ni2+ Fe2+ to introduce Fe-O-Fe moieties. These -containing NiFe-LDHs exhibit enhanced oxygen evolution reaction (OER) activity an ultralow overpotential 195 mV at current density 10 mA cm-2 ,...
Increasing catalytic activity and durability of atomically dispersed metal-nitrogen-carbon (M-N-C) catalysts for the oxygen reduction reaction (ORR) cathode in proton-exchange-membrane fuel cells remains a grand challenge. Here, high-power durable Co-N-C nanofiber catalyst synthesized through electrospinning cobalt-doped zeolitic imidazolate frameworks into selected polyacrylonitrile poly(vinylpyrrolidone) polymers is reported. The distinct porous fibrous morphology hierarchical structures...
A carbon support with favorable balance between graphitization and hierarchical porosity is promising to address corrosion issue in cathode catalysts for proton exchange membrane fuel cells (PEMFCs).
Abstract Metal anode instability, including dendrite growth, metal corrosion, and hetero-ions interference, occurring at the electrolyte/electrode interface of aqueous batteries, are among most critical issues hindering their widespread use in energy storage. Herein, a universal strategy is proposed to overcome instability by rationally designing alloyed materials, using Zn-M alloys as model systems (M = Mn other transition metals). An in-situ optical visualization coupled with finite...
Single-atom catalysts (SACs) with 100% active sites have excellent prospects for application in the oxygen evolution reaction (OER). However, further enhancement of catalytic activity OER is quite challenging, particularly development stable SACs overpotentials <180 mV. Here, we report an iridium single atom on Ni2P catalyst (IrSA-Ni2P) a record low overpotential 149 mV at current density 10 mA·cm–2 1.0 M KOH. The IrSA-Ni2P delivers up to ∼28-fold higher than that widely used IrO2 1.53 V vs...
In this study, we report a nonprecious metal catalyst for high-efficiency hydrogen evolution reaction (HER). A self-organized S-doped MoP nanoporous layer (S-MoP NPL) is achieved through facile electrochemical anodic process and two-step chemical vapor deposition treatment, which was directly used as binder-free HER in pH-universal electrolytes. S-MoP NPL exhibits behavior with low overpotential of 86 mV at 10 mA cm–1 Tafel slope 34 dec–1 acidic solution. Moreover, also shows high activity...
Transition-metal-based molecular complexes are a class of catalyst materials for electrochemical CO2 reduction to CO that can be rationally designed deliver high catalytic performance. One common mechanistic feature these electrocatalysts developed thus far is an electrogenerated reduced metal center associated with reduction. Here we report heterogenized zinc-porphyrin complex (zinc(II) 5,10,15,20-tetramesitylporphyrin) as electrocatalyst delivers turnover frequency 14.4 site-1 s-1 and...
Developing efficient electrocatalysts for an oxygen evolution reaction (OER) is important renewable energy storage. Here, we design high-density Ir single-atom catalysts supported by CoOx amorphous nanosheets (ANSs) the OER. Experimental results show that single atoms are anchored abundant surface-absorbed O in ANSs. possess ultrahigh mass activity 160-fold of commercial IrO2. The OER IrCoOx ANSs reached a record low onset overpotential less than 30 mV. In situ X-ray absorption spectroscopy...
Atomically dispersed and nitrogen coordinated single metal sites (M-N-C, M=Fe, Co, Ni, Mn) are the popular platinum group-metal (PGM)-free catalysts for many electrochemical reactions. Traditional wet-chemistry catalyst synthesis often requires complex procedures with unsatisfied reproducibility scalability. Here, we report a facile chemical vapor deposition (CVD) strategy to synthesize promising M-N-C catalysts. The of gaseous 2-methylimidazole onto M-doped ZnO substrates, followed by an in...
Abstract Ammonia (NH 3 ) electrosynthesis gains significant attention as NH is essentially important for fertilizer production and fuel utilization. However, electrochemical nitrogen reduction reaction (NRR) remains a great challenge because of low activity poor selectivity. Herein, new class atomically dispersed Ni site electrocatalyst reported, which exhibits the optimal yield 115 µg cm −2 h −1 at –0.8 V versus reversible hydrogen electrode (RHE) under neutral conditions. High faradic...
Direct methanol fuel cells (DMFCs) are promising power sources for portable electronic devices. Atomically dispersed M–N–C cathode catalysts demonstrated a great potential in addressing the high-cost and crossover issues DMFCs.
Harvesting recyclable ammonia (NH3) from the electrocatalytic reduction of nitrate (NO3RR) offers a sustainable strategy to close ecological nitrogen cycle nitration contamination in an energy-efficient and environmentally friendly manner. The emerging intermetallic single-atom alloys (ISAAs) are recognized achieve highest site density single atoms by isolating contiguous metal into sites stabilized another within structure, which holds promise couple catalytic benefits nanocrystals...