Dalian Institute of Chemicals, electrocatalytic reduction of carbon dioxide research progress

September 29, 2020

Recently, researchers from the State Key Laboratory of Catalysis of Dalian Institute of Chemical Physics, Chinese Academy of Sciences Wang Guoxiong, Yang Fan and Academician Bao Yanhe of the Chinese Academy of Sciences have made new progress in the study of enhanced electrocatalytic reduction of carbon dioxide at the metal-oxide interface. The relevant results were published a few days ago. Published on the American Chemical Society (J. Am. Chem. Soc. 2017, 139, 5652).

Electrocatalytic reduction of carbon dioxide, using clean electric energy such as renewable electric power or surplus nuclear power as the energy source, converts carbon dioxide into carbon monoxide, formic acid, hydrocarbons, alcohols and other high value-added fuels and chemicals in a single reaction under mild reaction conditions. Efficient conversion of carbon dioxide and effective storage of clean electricity. Currently, designing high-efficiency catalysts to reduce the overpotential and increase the selectivity of the reaction is a very challenging hot topic in the study of carbon dioxide electrocatalytic reduction.

The research team is based on the preliminary study of carbon dioxide electrocatalytic reduction (J. Am. Chem. Soc. 2015, 137, 4288; Nano Energy 2016, 27, 35; Chem. Sci. 2017, 8, 2569; Nano Res. 2017, Doi: 10.1007/s12274-017-1514-6) based on a full understanding of the metal-oxide interfacial catalytic confinement effect (Science 2010, 328, 1141; Nat. Sci. Rev. 2015, 2, 183; Nat. Commun 2017, 8, 14459) Designed and synthesized carbon-supported Au-CeOx catalysts with metal-oxide interfacial structure. The Au-CeOx interface and carbon dioxide were studied under the condition that the Au nanoparticle size and morphology were the same in different catalysts. The intrinsic correlation of electrocatalytic reduction performance. At -0.89 V (vs. RHE), the farnesic efficiency of carbon monoxide on the Au-CeOx catalyst reaches 89.1%, much higher than that of Au alone (59.0%) or CeOx catalyst (9.8%), and the current density of carbon monoxide produced is Au. 1.6 times. By constructing a CeOx/Au(111) model catalyst and conducting in-situ investigations using high-resolution scanning tunneling microscopy and synchrotron radiation energy spectra, it was found that the Au-CeOx interface significantly promotes the adsorption and activation of carbon dioxide at the interface of CeOx, and the presence of water helps. The reduction of CeOx surface is stable with the adsorption of carbon dioxide species on the surface. Density functional calculations further indicate that the Au-CeOx interface helps stabilize the key intermediate species, *COOH, in the subsequent hydrogenation process, thereby promoting carbon monoxide generation and desorption. This interface-enhanced electrocatalytic reduction of carbon dioxide has been further confirmed in the Ag-CeOx catalytic system, indicating the universality of the metal-oxide interface catalytic system in the electrocatalytic reduction of carbon dioxide. The research results provide a new way to regulate the electrocatalytic reduction of carbon dioxide, enriching and expanding the nano-limitation catalytic concept proposed by the research team.

The above research work has been funded by the National Natural Science Foundation of China, the National Key Research and Development Program, and the pilot projects of the Chinese Academy of Sciences.

Potassium Chloride, Magnesium Chloride, Calcium Chloride are normally used in food additives, low-sodium salts as stabilizer, nutrition supplement, salt substitute, gelling agent, yeast food, condiment, pH regulator, tissue softening agnet etc.

The Chloride ion /ˈklɔːraɪd/ is the anion (negatively charged ion) Cl−. It is formed when the element chlorine (a halogen) gains an electron or when a compound such as hydrogen chloride is dissolved in water or other polar solvents. Chloride salts such as sodium chloride are often very soluble in water.[4] It is an essential electrolyte located in all body fluids responsible for maintaining acid/base balance, transmitting nerve impulses and regulating fluid in and out of cells. Less frequently, the word chloride may also form part of the "common" name of chemical compounds in which one or more chlorine atoms are covalently bonded. For example, methyl chloride, with the standard name chloromethane (see IUPAC books) is an organic compound with a covalent C−Cl bond in which the chlorine is not an anion.
A chloride ion is much larger than a chlorine atom, 167 and 99 pm, respectively. The ion is colorless and diamagnetic. In aqueous solution, it is highly soluble in most cases; 
Sea water contains 1.94% chloride. Some chloride-containing minerals include the chlorides of sodium (halite or NaCl), potassium (sylvite or KCl ), and magnesium (bischofite), hydrated MgCl2. The concentration of chloride in the blood is called serum chloride, and this concentration is regulated by the kidneys. A chloride ion is a structural component of some proteins, e.g., it is present in the amylase enzyme.
Role in commerce.
The chlor-alkali industry is a major consumer of the world's energy budget. This process converts sodium chloride or Potassium chloride into chlorine and sodium hydroxide or Potassium hydroxide, which are used to make many other materials and chemicals. 
Water quality and processing:
Another major application involving chloride is desalination, which involves the energy intensive removal of chloride salts to give potable water. In the petroleum industry, the chlorides are a closely monitored constituent of the mud system. An increase of the chlorides in the mud system may be an indication of drilling into a high-pressure saltwater formation. Its increase can also indicate the poor quality of a target sand.
Chloride is also a useful and reliable chemical indicator of river / groundwater fecal contamination, as chloride is a non-reactive solute and ubiquitous to sewage & potable water. Many water regulating companies around the world utilize chloride to check the contamination levels of the rivers and potable water sources.
An example is Potassium chloride, which is Potassium chloride with the chemical formula KCl. In water, it dissociates into K+ and Cl− ions. Salts such as calcium chloride, magnesium chloride, potassium chloride have varied uses ranging from medical treatments, food additive to industrial applications.
Calcium chloride (CaCl2) is a salt that is marketed in pellet form for removing dampness from rooms. Calcium chloride is also used for maintaining unpaved roads and for fortifying roadbases for new construction. In addition, calcium chloride is widely used as a de-icer, since it is effective in lowering the melting point when applied to ice.

Chloride

Calcium Chloride Flakes,Calcium Chloride,Magnesium Chloride,Potassium Chloride

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