A5021423945- Electrocatalysts for Energy Conversion
- Fuel Cells and Related Materials
- Advanced Memory and Neural Computing
- Advanced battery technologies research
- Machine Learning in Materials Science
- Advanced Photocatalysis Techniques
- Advancements in Battery Materials
- Metal complexes synthesis and properties
- Hybrid Renewable Energy Systems
- Ferrocene Chemistry and Applications
- Nanomaterials for catalytic reactions
- Quantum Dots Synthesis And Properties
- Advancements in Solid Oxide Fuel Cells
- Semiconductor materials and interfaces
- Advanced Battery Materials and Technologies
- Semiconductor materials and devices
- Copper-based nanomaterials and applications
- Synthesis and Biological Evaluation
Cornell University
2020-2025
University of Puerto Rico at Río Piedras
2017
Hydrogen-derived power is one of the most promising components a fossil fuel-independent future when deployed with green and renewable primary energy sources. Energy from sun, wind, waves/tidal, other emissions-free sources can water electrolyzers (WEs), devices that produce hydrogen without carbon emissions. According to recent International Renewable Agency reports, WEs employed in industry are currently alkaline proton-exchange membrane (PEMWEs), ∼200 ∼70 years commercialization history,...
Hydrogen fuel cells have emerged as promising, potentially renewable energy-based, energy conversion technologies for powering electric vehicles. However, the sluggish oxygen reduction reaction (ORR) at cathode has remained a longstanding challenge and requires design of nonplatinum electrocatalysts with high activity and, ideally, low cost. Here, we present combinatorial study Pd–Cu thin-film electrodes well-defined composition structures, prepared by magnetron sputtering, fast method...
While certain ternary spinel oxides have been well-explored with colloidal nanochemistry, notably the ferrite family, manganese (Mn)-based not tamed. A key composition is cobalt (Co)-Mn oxide (CMO) spinel, CoxMn3-xO4, that, despite exemplary performance in multiple electrochemical applications, has few reports literature. Of these reports, most show aggregated and polydisperse products. Here, we describe a synthetic method for small, colloidally stable CMO nanocrystals tunable low...
The production of hydrogen fuels, via water splitting, is practical relevance for meeting global energy needs and mitigating the environmental consequences fossil-fuel-based transportation. Water photoelectrolysis has been proposed as a viable approach generating hydrogen, provided that stable inexpensive photocatalysts with conversion efficiencies over 10% can be discovered, synthesized at scale, successfully deployed (Pinaud et al., Energy Environ. Sci., 2013, 6, 1983). While number...
Alkaline fuel cells represent a promising energy conversion technology since they enable the use of precious metal-free electrocatalysts for oxygen reduction reaction. Among these, La-based perovskite oxides, with great compositional and structural tunability, are especially attractive. However, we believe that current literature lacks thorough understanding their inherent (in)stability issues. Here, report on nine oxide reaction, including LaMO3 (M = Mn, Co, Ni) LaCoxM1–xO3 Ni; x 0.9, 0.5,...
Spinel oxides such as ternary cobalt manganese spinel (CMOs) are promising electrocatalysts for oxygen reduction reaction (ORR) in anion exchange membrane fuel cells. Current efforts to enhance cell cathode performance predominantly focus on tuning the ORR activity through chemical and crystallographic engineering of active material. However, impact ink formulation film homogeneity remains poorly understood under-investigated. Here we show that deliberate retention organic ligands can a...
Pt deposited by either sputtering or electron-beam (e-beam) evaporation on p-Si forms an ohmic contact, with zero photovoltage and very little photogenerated charge-carrier collection. However, electro- electroless deposition of onto produces a rectifying junction that generates ∼300 mV under simulated 1 sun illumination. To explain these differences, we have characterized junctions formed e-beam H-terminated oxide-coated substrates using impedance spectroscopy, X-ray photoelectron...
Catalysis has been crucial in advancing and commercializing energy conversion technologies. It is essential to identify abundant, active, stable materials enable the reliable cost-efficient use of catalysts renewable technologies, such as fuel cells (FCs) electrolyzers. Suitable candidates, nonprecious metals, can be found first-row transition where bimetallics, metal oxides, nitrides readily synthesized. Recently, these have exhibited high activity toward oxygen reduction (ORR) evolution...
Current commercial fuel cells operate in acidic media where Pt-containing compositions have been shown to be the best oxygen reduction reaction (ORR) electrocatalysts, due their facile kinetics and long-term stability under operating conditions. However, with development of alkaline membranes, become a potentially viable alternative that offers possibility using Pt-free (precious metal-free) electrocatalysts. search for better electrocatalysts can very effort-consuming, if we intend test...
Correction for ‘Optimizing accuracy and efficacy in data-driven materials discovery the solar production of hydrogen’ by Yihuang Xiong et al. , Energy Environ. Sci. 2021, 14 2335–2348; DOI: 10.1039/D0EE02984J.