scispace - formally typeset
Search or ask a question

How does a photoelectric chemical cell work? 


Best insight from top research papers

A photoelectrochemical cell is a device that converts solar energy into useful fuels or electricity. It consists of a photoactive electrode, an electrolyte, and an auxiliary electrode. The photoactive electrode receives light through a light window and initiates a redox reaction. The electrolyte facilitates the movement of ions between the electrodes, while the auxiliary electrode completes the circuit. The cell operates in three main modes: regenerative PECs, where no Gibbs function change occurs in the cell; photoelectrolytic cells, where two separate redox reactions are driven at the electrodes; and cells for photoelectrocatalysis, which have potential applications in environmental purification. Advances in cell design and materials have led to increased efficiency, corrosion control, and long-term stability. Nanostructured materials and dye sensitization have also been developed to enhance performance.

Answers from top 5 papers

More filters
Papers (5)Insight
Book ChapterDOI
F. Decker, S. Cattarin 
01 Jan 2009
5 Citations
The paper does not provide a direct explanation of how a photoelectrochemical cell works.
The paper does not provide a detailed explanation of how a photoelectrochemical cell works.
The paper does not provide information on how a photoelectric chemical cell works. The paper is about a specific photovoltaic cell for supplying power to a chemical machine in chemical production.
The paper does not provide a direct explanation of how a photoelectrochemical cell works.
The paper does not provide information on how a photoelectrochemical cell works.

Related Questions

What is photoelectric colorimetry?4 answersPhotoelectric colorimetry is a technique used to determine the concentration of a substance in a solution by analyzing the intensity of light transmitted through the solution. It involves passing a light beam of a specific wavelength through the solution, and measuring the amount of light absorbed by the solution. The absorption of light follows Beer-Lambert's law, which states that the amount of transmitted light decreases exponentially with an increase in the concentration of the absorbing medium. In photoelectric colorimetry, a colorimeter is used to detect the intensity of light transmitted through the solution. The light passes through the sample and is captured by a photodiode sensor, which converts the light into an output voltage. This voltage is then amplified and displayed on a device such as an Arduino with an LCD screen.
Can photoelectrochemical wayproduces hydrogen?4 answersYes, the photoelectrochemical process can produce hydrogen. Researchers have been exploring the use of photoelectrochemical cells for hydrogen generation, utilizing efficient and low-cost photoelectrode materials under practical operating conditions. These cells have shown potential for converting sunlight into hydrogen energy. In addition, the production of hydrogen from solar energy and abundant reagents offers a promising pathway to a sustainable fuel economy and chemical industry. The photoelectrochemical process involves the splitting of water molecules to produce hydrogen, and various approaches have been developed to improve the efficiency of this process. By substituting the oxygen evolution reaction with more favorable oxidation reactions, the photoelectrochemical process can also produce value-added chemicals in addition to hydrogen. Overall, the photoelectrochemical process holds promise for the production of hydrogen and other valuable products using renewable resources.
How does photvoltaic cells work?4 answersPhotovoltaic cells, also known as solar cells, convert sunlight directly into electric current by using semiconductor materials such as crystalline silicon. When photons from sunlight strike the semiconductor material, they raise electrons from the valence band to the conduction band, creating a flow of electric current. The equilibrium carrier concentration, which is the number of carriers per volume in the conduction and valence bands without any external electric field or illumination, plays a crucial role in the function of solar cells. The generation and recombination processes of carriers are important principles in understanding how solar cells work. The current densities in solar cells are determined by minority carrier concentration gradients, which depend on factors such as donors, acceptors, minority carrier diffusion length, and material.
What are the main problems related making uses of photoelectrochemical cells?5 answersPhotoelectrochemical cells have several problems including corrosion and film formation.These cells are often not suitable for ecological or biological work as they are not easily insulated and lack standardization for specific purposes.In terms of photovoltaic operation, photoelectrochemical cells have potential advantages over solid state cells in terms of lower cost and the ability to generate more desirable products.However, the technical construction of regenerative photoelectrochemical cells for photovoltaic use is still a challenge and the reported efficiencies are not yet achieved in practical devices.
What is an electrochemical cell?5 answersAn electrochemical cell is a device that converts chemical energy into electrical energy or vice versa. It consists of two electrodes, called the anode and the cathode, which are immersed in an electrolyte solution. There are two types of electrochemical cells: galvanic or voltaic cells, which generate electrical energy from a spontaneous chemical reaction, and electrolytic cells, which use an external electrical source to drive a non-spontaneous chemical reaction. The flow of current in an electrochemical cell is caused by the transfer of electrons between the electrodes through the electrolyte. The potential energy of electrons in the working electrode is observed/controlled with respect to the reference electrode.
What is an electrochemical cell?3 answersAn electrochemical cell is a device that converts chemical energy into electrical energy or vice versa. It consists of two electrodes, an anode and a cathode, which are immersed in an electrolyte solution. There are two types of electrochemical cells: galvanic cells, also known as voltaic cells, and electrolytic cells. Galvanic cells generate electrical energy from spontaneous chemical reactions, while electrolytic cells use electrical energy to drive non-spontaneous chemical reactions. The flow of current in an electrochemical cell is caused by the transfer of electrons between the electrodes through the electrolyte. The potential energy of electrons in the working electrode is observed or controlled with respect to a reference electrode.

See what other people are reading

Why does acid concentration matter in CuSO4 electrolysis?
5 answers
The acid concentration in CuSO4 electrolysis plays a crucial role in various aspects of the electrochemical processes involved. Different studies have highlighted the significance of acid concentration in influencing factors such as deposition rate, morphology of deposited layers, reversibility of Cu2+/Cu couple, dissolution-electrodeposition performance of Cu, and conductivity of the electrolyte. Acid concentration affects the effective diffusion coefficients of cupric ions, which in turn impact the quality of copper electrowinning deposits. Additionally, acid concentration influences the behavior of the anodic Tafel slope, the formation of corrosion product films, and the onset of limiting current and active-passive behaviors during Cu electrolysis. Therefore, maintaining the appropriate acid concentration is essential for optimizing the efficiency and quality of CuSO4 electrolysis processes.
How does portable sensor to measure center of pressure for jockeys?
4 answers
A portable sensor for measuring the center of pressure (COP) for jockeys can be designed using various innovative approaches. One method involves utilizing a flexible insole instrument (FII) with embedded tactile sensors to estimate COP in real-time wirelessly. Another approach suggests estimating foot COP during walking by integrating information from wearable inertial sensors located on different body parts, such as the left ankle, and using a nonlinear autoregressive moving average with exogenous input (NARMAX) model for accurate COP movement prediction. Additionally, a sensor for pressure measurement with electrically conductive tracks on a fabric support can be employed to sense pressure differences across opposite faces, providing valuable data for COP estimation. These methods offer portable, user-friendly, and cost-effective solutions for measuring COP, essential for jockeys' balance and performance monitoring.
What contributes to the spread of studs and stis?
5 answers
Migration plays a significant role in the spread of sexually transmitted infections (STIs) and diseases. Historically, migration has been linked to the transmission of diseases like smallpox, impacting indigenous populations [. Workers in remote areas, including migrants, are particularly vulnerable to STIs due to factors like loneliness, isolation, and engaging in risky sexual practices while away from regular partners [. Changes in social behavior, migration, and international travel have contributed to the rise in STI cases in Europe, with molecular diagnostic techniques aiding in better detection and characterization of infections [. Additionally, the spread of infectious diseases, including STIs, is influenced by the rate of contact between susceptible and infectious individuals, with migration facilitating such interactions [. Preventative measures are crucial to mitigate the impact of STIs on individuals, families, healthcare systems, and employers [.
What are the social impacts of iron air batteries?
5 answers
Iron-air batteries have significant social impacts due to their potential in large-scale energy storage for renewable integration, aiding climate mitigation. These batteries offer a cost-effective solution for storing energy from renewables, supporting the transition to a zero-emission economy. Additionally, advancements in iron-air battery technology, such as the use of ionic liquids as electrolyte additives, can enhance battery performance and cycling stability, paving the way for more reliable and durable energy storage systems. The development of novel solid oxide iron-air batteries further contributes to the future energy infrastructure by providing efficient and affordable energy storage mechanisms for smart grids and renewable energy integration. Overall, iron-air batteries have the potential to revolutionize energy storage, making renewable energy more accessible and reliable, thus positively impacting society as a whole.
How do structured cathodes affect the performance of electrodes in thicker batteries?
5 answers
Structured cathodes play a crucial role in enhancing the performance of electrodes in thicker batteries by influencing various electrochemical processes. The morphology of hierarchically structured electrodes determines key factors such as electronic conductivity, solid diffusion, and ionic transport, which are essential for optimizing cell performance. For instance, electrodes with vertical microchannels and interconnected pores exhibit improved electrolyte infiltration, fast ion transport kinetics, and low tortuosity, leading to enhanced rate performance and cycling stability even at high areal loadings. Additionally, structured 3D electrode designs in redox flow batteries have shown comparable electrode potentials at significantly lower pumping power compared to conventional disordered electrodes, enabling higher current densities at the same pumping cost. These findings highlight the significance of structured cathodes in improving the efficiency and energy density of thicker batteries.
What is the structure of crossbow?
5 answers
The structure of a crossbow typically includes various components such as a fixer with a seat, rolling element, resilient element, and shock absorber. Additionally, a crossbow assembly structure consists of a bow body, fixed part, and bow arm assembled through bolts and containing grooves. Furthermore, a trigger labor-saving structure involves a body, arcuate limb, and trigger assembly with a trigger seat, trigger, and string hook member to reduce frictional resistance. Another innovative crossbow structure is designed for shooting a field climbing rope, featuring a handheld crossbow, remote-control unit, climbing rope, and long handle crossbow arrow with a side direction rotary redirection rudder. Moreover, a crossbow design includes a stock, riser, mounting brackets, cam assemblies, limbs, drawstring, and power cables forming a crossing pattern within the stock.
What is the effect of a battery's redox potential?
4 answers
The redox potential of a battery plays a crucial role in its performance and stability. For instance, in lithium-ion batteries, incorporating redox shuttles with specific oxidation potentials can prevent overcharge, especially in batteries with high voltage cathodes. In Li-metal batteries, the redox potential of Li metal significantly impacts the Coulombic efficiency (CE) during Li plating/stripping processes. Increasing the redox potential of Li metal can enhance CE by narrowing the gap from the potential window of the electrolyte, thereby reducing electrolyte degradation. Additionally, in redox flow batteries, computational studies have shown that the redox potential influences current and voltage distribution, as well as the trade-off between flow rate and pressure drop, affecting overall battery performance. Understanding and optimizing the redox potential is essential for designing efficient and stable battery systems.
What is the plasma formed during the RF sputtering deposition method ?
4 answers
The plasma formed during the RF sputtering deposition method is highly ionized and consists of sputtered species that can include metallic, non-magnetic, ceramic, and oxide materials. This plasma is generated with or without a magnetic field, with the power being pulsed to create a peak power density greater than 50 Wcm-2 at the RF antenna. The sputtering process involves the application of a pulsed DC voltage to accelerate argon ions towards the cathode (sputter target) within the plasma, leading to the ionization of metallic species and the modification of surfaces of industrial components and biomedical parts. The plasma's characteristics include high ionization levels of metallic species and the magnetization of charged particles.
How Pollution shows in the movie trashed directed by candida brady??
4 answers
Pollution is creatively showcased in the movie "Trashed" directed by Candida Brady through a unique approach involving music, dance, and an experimental film made from trash collected from the New River in North Carolina. The film features a live performance where trash from the river is incorporated into the film leader, creating visually compelling and thought-provoking imagery. The Trash Trout Motion Picture Show aims to raise public awareness about the pollution threatening local rivers, particularly from single-use plastics like fast food packaging. The film's engaging presentation, accompanied by traditional music and dance, highlights the environmental impact of pollution on water bodies, encouraging viewers to reflect on their relationship with rivers and waste management.
Corrosion은 faradaic reaction이야 non faradaic reaction이야?
4 answers
Corrosion involves Faradaic reactions, not non-Faradaic reactions. Faradaic processes involve charged particles transferring across electrodes, leading to changes in electrode charge, voltage, and composition, while non-Faradaic processes store charge progressively without such changes. The acceleration of Faradaic reactions by oscillating electric potentials has been explored for enhancing electrocatalysis, demonstrating the Faradaic nature of these reactions. Additionally, the modification of catalytic activity through electrochemical means has shown significant impacts on heterogeneous catalysis, further emphasizing the Faradaic nature of these processes. Therefore, corrosion, being a process involving charge transfer and changes in electrode properties, aligns with Faradaic reactions rather than non-Faradaic processes.
What is the benefit of having the first and the second modes of resonant frequency closer in CMUT?
5 answers
Having the first and second modes of resonant frequency closer in a Capacitive Micromachined Ultrasonic Transducer (CMUT) offers significant advantages. This proximity allows for independent tuning of the resonances, especially in terms of amplitude, by optimizing electrode configurations and applied voltages. Additionally, when the first two resonances are close, dual-frequency actuations can be achieved without significant vibrational crosstalk, resulting in high-quality dual-frequency acoustic radiation. Moreover, operating CMUT cells with different bias voltages in elevationally different regions of the array aperture can lead to variable frequency characteristics, mimicking depth-dependent frequency attenuation for improved performance in near and far fields. This approach enhances the versatility and performance of CMUT arrays in various applications, including biomedical imaging and sensing.