Progress in the study of high efficiency electroca

Progress has been made in the research of high-efficiency electrocatalytic reduction of carbon dioxide

on April 13, the national key of catalytic foundation of Dalian Institute of Chemical Physics, Chinese Academy of Sciences was implemented, so it is worth choosing The above information is for reference only. In cooperation with Professor Wang Jianguo of Zhejiang University of technology, researchers such as gaodunfeng, Wang Guoxiong and academician Bao Xinhe of the laboratory have made progress in the study of high-efficiency electrocatalytic reduction of carbon dioxide. They found that nano palladium electrodes efficiently catalyze the reduction of carbon dioxide to produce carbon monoxide, and their catalytic performance is strongly dependent on the size of nanoparticles. The relevant results were published in the Journal of the American Chemical Society (J. am. chem. soc. 2015, 137, 4 China is a party to the Stockholm Convention 288 − 4291)

in recent years, the annual increase of global carbon dioxide emissions has posed a serious threat to the ecological environment on which people rely for survival. Therefore, the capture, storage and transformation of carbon dioxide have attracted extensive attention of researchers. In terms of carbon dioxide conversion, the reduction of carbon dioxide by traditional chemical methods requires the provision of energy and hydrogen at the same time, while the reduction of carbon dioxide by electrocatalysis and the coupling with electrolytic water to obtain hydrogen from water can directly obtain high-value chemicals and liquid fuels such as carbon monoxide, hydrocarbons and methanol in one step under relatively mild reaction conditions. At the same time, the combination of this process with renewable energy or surplus nuclear energy utilization to achieve large-scale electric energy storage shows great potential application prospects, and has become an important research hotspot in related fields

PD is a typical catalyst for hydrogen evolution reaction. The high reduction overpotential of CO2 on the bulk PD electrode and the low Faraday efficiency caused by the competitive hydrogen evolution reaction. The team's experimental research found that the CO2 reduction selectivity and activity of Pd nanoparticles showed a significant size dependence in the range of 2.4 – 10.3 nm. At − 0.89 V (vs. rhe), the Faraday efficiency of CO generation increased from 5.8% on 10.3 nm PD to 91.2% on 3.7 nm PD. At the same time, the current density of CO increased by 18.4 times in various physical and mechanical properties tests of plastic films, wires and cables, waterproof rolls, wires, cartons and other materials. The free energy of CO2 reduction and hydrogen evolution reaction at three different reaction sites (plane, step and corner) was analyzed by density functional theory (DFT), and the relationship between reaction performance and particle size was established. The relationship between the conversion frequency (TOF) of CO generation and the particle size shows a volcanic curve, which indicates that the size of Pd nanoparticles can be changed to adjust the CO2 adsorption, the formation of intermediate species cooh* and the desorption of co*, so as to realize the 5% reduction of Pd nanoparticles from hydrogen evolution catalyst to efficient CO2 reduction catalyst Spring amplitude: 0 (5) 0mm; Transformation

the research was supported by the National Natural Science Foundation of China and the Ministry of science and technology

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