Question regarding Photoelectrochemical cells and fuel cells https://www.researc

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Question regarding Photoelectrochemical cells and fuel cells

https://www.researchgate.net/publication/311210193_Fuel_cells_vs_Batteries_in_the_Automotive_Sector

https://pubs.acs.org/cen/science/88/8827sci1.html

Wireless Solar Water Splitting...: http://www.scienceintheclassroom.org/sites/default/files/research-papers/complete_science_resources_for_water_splitting_0.pdf

QUESTION 1 Photo electrochemical cells (PECs) are modeled after the photosynthetic systems found in plants. Photosynthesis allows plants to use sunlight as driving force to create what chemicals? oxygen and hydrogen oxygen and water oxygen and NADPH Sugar and hydrogen QUESTION 2 The catalysts in the PEC perform what function? Convert the sunlight directly into electrical energy similar to a solar cell. Catalyze the oxidation and reduction hal eactions needed to decompose water into oxygen and hydrogen. Provide the heat needed to decompose water into oxygen and hydrogen. All of these are correct. QUESTION 3 What are the limitations of current catalysts used in PEC's? Current catalysts are not very efficient Current catal are comprised from expensive and rare metals. lysts Current catalysts are not very stable under the PEC reaction conditions. All of these are correct.

Explanation / Answer

Hi Answer:

1. Photo-electrochemical cells (PECs) are the modelled after the photosynthetic systems found in plants. Photosynthesis allows plants to use sunlight as driving force to create what chemicals?

Answer: Option C (Oxygen and NADPH)

Explanation: The light-dependent or light reactions take place on the thylakoid membranes. These reactions are also called the photolysis reactions which convert solar energy into chemical energy (ATP & NADPH) with the help of chlorophyll pigment. The end product of the light reactions is oxygen. The major aim of the light reaction is to produce energy which can be used in dark reactions.

2. The catalysis in the PEC perform what function?

Answer: Option D (All of these are correct)

Explanation: The PECs act like a solar cell which converts solar energy into electric energy. The PECS also catalyze the redox reactions and provide heat energy which is necessary for the decomposition of water into oxygen and hydrogen.

3. What are the limitations of current catalysis used in PEC?

Answer: Option D (All of these are correct)

Explanation: The PEC catalyses is not so much efficient and stable along with this catalysis reaction is not economic in nature.

4. The hydrogen fuel produced from a PEC is used for what purpose?

Answer: Option D (All of these are correct)

Explanation: The fuel produced by the PEC can be used for various purposes just like other traditional fuel we used. In addition to this, the PEC is much more convenient and simple system to produce hydrogen fuel than other systems which produce hydrogen. In addition, PEC provides wide operating temperature having more high and low operational temperature ranges.

5. What are the advantages of fuel cell vehicles (FCVs) over battery-electric vehicles (BEVS)?

Answer: Option C (A & B are correct)

Explanation: Because the electric vehicles are at least 3 times more energy efficient than the hydrogen fuel cell vehicles.

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