A5002346665- CO2 Reduction Techniques and Catalysts
- Electrocatalysts for Energy Conversion
- Advanced battery technologies research
- Catalytic Processes in Materials Science
- Ionic liquids properties and applications
- Advanced Thermoelectric Materials and Devices
- Ammonia Synthesis and Nitrogen Reduction
- Biodiesel Production and Applications
- Molecular Junctions and Nanostructures
- Advanced Photocatalysis Techniques
- Carbon dioxide utilization in catalysis
- Mesoporous Materials and Catalysis
- Fuel Cells and Related Materials
- Catalysis and Oxidation Reactions
- Algal biology and biofuel production
- Molten salt chemistry and electrochemical processes
- Zeolite Catalysis and Synthesis
- Semiconductor materials and interfaces
- Carbon Dioxide Capture Technologies
- Catalysts for Methane Reforming
- Carbon and Quantum Dots Applications
- Petroleum Processing and Analysis
- Catalysis and Hydrodesulfurization Studies
- Membrane Separation and Gas Transport
- Conducting polymers and applications
University of Cincinnati
2022-2024
Jawaharlal Nehru Centre for Advanced Scientific Research
2019-2024
Arunai Engineering College
2019-2021
Electrochemical CO2 reduction reaction (eCO2 RR) is performed on two intermetallic compounds formed by copper and gallium metals (CuGa2 Cu9 Ga4 ). Among them, CuGa2 selectively converts to methanol with remarkable Faradaic efficiency of 77.26% at an extremely low potential -0.3 V vs RHE. The high performance compared driven its unique 2D structure, which retains surface subsurface oxide species (Ga2 O3 ) even in the atmosphere. Ga2 mapped X-ray photoelectron spectroscopy (XPS) absorption...
Carbon materials are considered promising 2/4 e- oxygen reduction reaction (ORR) electrocatalysts for synthesizing H2 O2 /H2 O via regulating heteroatom dopants and functionalization. Here, various doped functionalized graphene quantum dots (GQDs) designed to reveal the crucial active sites of carbon ORR produce . Density functional theory (DFT) calculations predict that edge structure involving N, B dopant pairs further OH functionalization (NBOH) is an center 2e- ORR. To verify above...
Manipulating the selectivity-determining step in post-C–C coupling is crucial for enhancing C2 product specificity during electrocatalytic CO2 reduction, complementing efforts to boost rate-determining kinetics. Here we highlight role of single-site noble metal dopants on Cu surfaces influencing C–O bond dissociation an oxygen-bound intermediate, steering toward ethylene versus ethanol. Integrating theoretical and experimental analyses, demonstrate that oxygen binding strength surface...
A comprehensive overview on porous silica immobilized amines as efficient materials for direct air CO 2 capture.
Abstract Carbon materials hold significant promise in electrocatalysis, particularly electrochemical CO 2 reduction reaction (eCO RR) and two‐electron oxygen (2e − ORR). The pivotal factor achieving exceptional overall catalytic performance carbon catalysts is the strategic design of specific active sites nanostructures. This work presents a comprehensive overview recent developments electrocatalysts for eCO RR 2e ORR. creation through single/dual heteroatom doping, functional group...
Abstract Metal phthalocyanine molecules with Me‐N 4 centers have shown promise in electrocatalytic CO 2 reduction (eCO R) for generation. However, iron (FePc) is an exception, exhibiting negligible eCO R activity due to a higher * COOH conversion barrier and stronger binding energy. Here, amine functional groups onto atomic‐Fe‐rich carbon dots (Af‐Fe‐CDs) are introduced via one‐step solvothermal molecule fusion approach. Af‐Fe‐CDs feature well‐defined Fe‐N active sites impressive Fe loading...
The discovery of new materials for efficient transformation carbon dioxide (CO2) into desired fuel can revolutionize large-scale renewable energy storage and mitigate environmental damage due to emissions. In this work, we discovered an operando generated stable Ni–In kinetic phase that selectively converts CO2 methanol (CTM) at low pressure compared the state-of-the-art materials. catalytic nature a well-known methanation catalyst, nickel, has been tuned with introduction inactive indium,...
Abstract Compared with the traditional heteroatom doping, employing heterostructure is a new modulating approach for carbon‐based electrocatalysts. Herein, facile ball milling‐assisted route proposed to synthesize porous carbon materials composed of abundant graphene/hexagonal boron nitride (G/h‐BN) heterostructures. Metal Ni powder and nanoscale h‐BN sheets are used as catalytic substrate/hard template “nucleation seed” formation heterostructure, respectively. As‐prepared G/h‐BN...
The electrochemical CO 2 or reduction to chemicals and fuels using renewable energy is a promising way reduce anthropogenic carbon emissions. gas diffusion electrode (GDE) design enables low-carbon manufacturing of target products at current density (e.g., 500 mA cm −2 ) relevant industrial requirements. However, the long-term stability GDE restricted by poor water management flooding, resulting in significant hydrogen evolution reaction (HER) within almost an hour. optimization demands...
Heterogeneous catalysis facilitated by intermetallic nanoparticles has recently been the subject of increased scrutiny. Given enhanced selectivity and stability, they bestow to many chemical reactions compared their monometallic...
Achieving high selectivity for carbon monoxide (CO) in the electrochemical reduction of dioxide (CO2) at industrially relevant current densities, particularly with dilute CO2 feedstocks, remains a significant challenge. Herein,...
Electrochemical CO2 reduction reaction (eCO2RR) has been explored on tungsten carbide (WC) nanoparticles embedded N-doped graphitic carbon (NGC), demonstrating excellent activity toward the formation of acetic acid at an extremely lower potential. The further enhanced by loading ultralow copper sites into catalyst system, exhibiting 80.02% Faradaic efficiency (FE) applied potential −0.3 V (vs RHE). Potential-dependent in situ infrared (IR), X-ray photoelectron spectroscopy (XPS), Raman...
The production of acetic acid from CO 2 is tuned by the atomic ordering and optimized chemical bonding in ternary chalcogenides.
Different operational strategies of pulsed electrolysis lead to different origins for the enhancement multi-carbon product formation in electrocatalytic CO 2 reduction.
Mitigating global CO2 concentrations from anthropogenic sources through electrochemical conversion to value-added chemicals is the need of hour. In this work, fundamental concept "Lattice Charge" has been strategically manipulated in materials selectively produce multi-carbon products greenhouse gas. To achieve this, a series catalysts within well-known ABX2 family (A = Ag, Cu; B In, Ga, Fe; X S, Se) have explored, which exhibit significant activity toward reduction reaction (eCO2RR) and...
The identification of the rate-determining step (RDS) in electrochemical CO/CO2 reduction to multi-carbon (C2+) products has been complicated by deficiency rigorous reaction kinetic data. This work describes an experimental analysis key steps exploring effect CO partial pressure on activity C2+ products. With aid a flow electrolyzer integrated with gas diffusion electrode, distinct orders and mechanisms forming different were determined. Specifically, *CO dimerization is identified as RDS...
Intermetallic compounds (IMCs) composed of transition metals and post-transition function as superior heterogeneous catalysts in comparison to their monometallic bimetallic alloy counterparts. Rendering IMCs nanomaterial iterations further enhances efficiency. Herein, we demonstrate the role PdIn well-dispersed intermetallic nanoparticles (IMNPs) for semihydrogenation phenylacetylene selectively styrene at ambient conditions. Higher selectivity was explained with help DOS calculations. We...