High‐Temperature Semiconductor CuO/SiC‐Based Catalyst for Artificial Photosynthesis
2
Citation
36
Reference
10
Related Paper
Citation Trend
Abstract:
Abstract Artificial photosynthesis can convert CO 2 and H 2 O into hydrocarbons via solar energy. However, the extremely low process efficiency is a major obstacle to this application. The photocatalyst is considered to be the key factor to raise the overall solar energy conversion efficiency. Much research focused on co‐catalysts, but less attention has been paid on the high‐temperature semiconductor. Herein, a strategy is proposed involving high‐temperature semiconductor to design target photocatalyst dealing with the artificial photosynthesis at high temperature. Based upon this strategy, a CuO/SiC catalyst with single atom characteristic was designed, prepared and the activity of CO 2 photoreduction with H 2 O was tested in a high temperature environment. Above 150 °C, the catalyst activity was boosted and unprecedented performance values were attained. Under the irradiation condition delivered by a 1000 W Xe light and at 350 °C, the obtained yields of CH 4 , C 2 H 4 , and C 2 H 6 were 2041.4 μmol ⋅ g −1 , 15.2 μmol ⋅ g −1 , and 63.6 μmol ⋅ g −1 , respectively. The overall CO 2 conversion reached 24.6 % and the maximum solar energy conversion efficiency was 2.3 % without any sacrificed agents. This strategy will be helpful to overcome the current limitations for the industrialization of artificial photosynthesis and accelerate the related research on photothermal catalysis.Keywords:
Energy transformation
Chemical energy
The idea of the critical conversion efficiency is suggested to improve the conversion efficiency of light energy.The critical conversion efficiency is defined as the conversion efficiency of light energy when the hydrogen energy output is equal to the energy input from the outside system.The energy profit cannot be achieved until the conversion efficiency of light energy is greater than the critical value.A system with Na_2S/Na_2SO_3 as sacrificial reagent is analyzed and calculated.The results show that the critical conversion efficiency of light energy reaches 13% when the annual hydrogen production is 20,000 tons.
Energy transformation
Light energy
Cite
Citations (1)
Chemical energy
Energy transformation
Thermal energy
Chemical reactor
Cite
Citations (38)
Energy transformation
Photothermal effect
Solar energy conversion
Chemical energy
Photothermal spectroscopy
Cite
Citations (40)
There are many ways in which the energy around us can be stored, converted, and developed for use. Energy exists in two basic types: potential energy, including chemical, elastic, gravitational, and nuclear energies, and kinetic energy, including heat, electrical, and electromagnetic energies. It is often necessary to convert one type of energy to another type or other types of energy. However, human engineering and nature take very different paths to complete such conversion processes. This paper discusses the similarities and dissimilarities of energy conversion processes that are taken by nature and human engineering. One might notice that energy conversion efficiency in biological systems is often higher than what human engineering can offer. As an attempt to mimic nature’s way of energy conversion on the nanoscale, our experiment indicates that nanocatalytic particles can convert chemical energy directly to thermal energy without conventional high-temperature gas-phase combustion and without the traditional ignition process. Furthermore, we have converted chemical energy to thermal energy and thermal energy to electrical energy on semiconductor materials, an achievement that raises the possibility of constructing a new class of nano-thermoelectric power generation systems.
Energy transformation
Chemical energy
Electric potential energy
Thermal energy
Mechanical energy
Cite
Citations (1)
Chemical energy
Electrochemical energy conversion
Energy transformation
Regenerative fuel cell
Electrochemical cell
Electric potential energy
Direct energy conversion
Cite
Citations (2)
Artificial photosynthesis is a chemical process that replicates the natural process of photosynthesis, a process that converts sunlight, water, and carbon dioxide into carbohydrates and oxygen. The term is commonly used to refer to any scheme for capturing and storing the energy from sunlight in the chemical bonds of a fuel (a solar fuel). Photocatalytic water splitting converts water into protons (and eventually hydrogen) and oxygen, and is a main research area in artificial photosynthesis. Light-driven carbon dioxide reduction is another studied process, replicating natural carbon fixation.Research developed in this field encompasses design and assembly of devices (and their components) for the direct production of solar fuels, photoelectrochemistry and its application in fuel cells, and engineering of enzymes and photoautotrophic microorganisms for microbial biofuel and biohydrogen production from sunlight. Many, if not most, of the artificial approaches are bio-inspired, i.e., they rely on biomimetics .Since the 1950s scientists have been developing systems to produce solar fuels using artificial photosynthesis, natural photosynthesis and thermo chemical routes. The term is commonly used to refer to any scheme for capturing and storing the energy from sunlight in the chemical bonds of a fuel (a solar fuel). Photo catalytic water splitting converts water into protons (and eventually hydrogen) and oxygen, and is a main research area in artificial photosynthesis. Light-driven carbon dioxide reduction is another studied process, replicating natural carbon fixation.Research developed in this field encompasses design and assembly of devices (and their components) for the direct production of solar fuels, photo electrochemistry and its application in fuel cells, and engineering of enzymes and photoautotrophic microorganisms for microbial biofuel and biohydrogen production from sunlight. Many, if not most, of the artificial approaches are bio-inspired, i.e., they rely on biomimetics.
Solar fuel
Chemical energy
Carbon fixation
Cite
Citations (0)
Chemical energy
Mechanical energy
Energy transformation
Isothermal process
Cite
Citations (78)
Inspired by the autonomously moving organisms in nature, artificially synthesized micro-nano-scale power devices, also called micro-and nanomotors, are proposed. These micro-and nanomotors that can self-propel have been used for biological sensing, environmental remediation, and targeted drug transportation. In this article, we will systematically overview the conversion of chemical energy or other forms of energy in the external environment (such as electrical energy, light energy, magnetic energy, and ultrasound) into kinetic mechanical energy by micro-and nanomotors. The development and progress of these energy conversion mechanisms in the past ten years are reviewed, and the broad application prospects of micro-and nanomotors in energy conversion are provided.
Energy transformation
Chemical energy
Mechanical energy
Light energy
Electric potential energy
Cite
Citations (24)
Article Thermodynamics and kinetics associated with semiconductor-based photoelectrochemical cells for the conversion of light to chemical energy was published on January 1, 1985 in the journal Pure and Applied Chemistry (volume 57, issue 1).
Chemical energy
Energy transformation
Photoelectrochemical cell
Solar energy conversion
Photoelectrochemistry
Light energy
Cite
Citations (26)
Energy transformation
Chemical energy
Chromophore
Solar energy conversion
Cite
Citations (7)