{"id":183061,"date":"2021-02-19T18:59:03","date_gmt":"2021-02-19T15:59:03","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/amination-strategy-improves-efficiency-of-carbon-dioxide-electrocatalytic-reduction\/"},"modified":"2021-02-19T18:59:03","modified_gmt":"2021-02-19T15:59:03","slug":"amination-strategy-improves-efficiency-of-carbon-dioxide-electrocatalytic-reduction","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/amination-strategy-improves-efficiency-of-carbon-dioxide-electrocatalytic-reduction\/","title":{"rendered":"#Amination strategy improves efficiency of carbon dioxide electrocatalytic reduction"},"content":{"rendered":"

“#Amination strategy improves efficiency of carbon dioxide electrocatalytic reduction<\/strong>”<\/p>\n

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\"Amination
\n (a) Schematic of the synthesis process for Ni-N4<\/sub>\/C-NH2<\/sub>, (b) Schematic of a gas-fed flow cell configuration, (c) electrocatalytic activity of Ni-N4<\/sub>\/C-NH2<\/sub> in flow cell Credit: CHEN Zhipeng
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Carbon dioxide (CO2<\/sub>) electrocatalytic reduction driven by renewable electricity can solve the problem of excessive CO2<\/sub> emissions. Since CO2<\/sub> is thermodynamically stable, efficient catalysts are needed to reduce the energy consumption in the process.<\/p>\n

The single-atom catalysts immobilized on nitrogen-doped carbon supports (M-N\/C) have been widely used for CO2<\/sub> electrocatalytic reduction reaction due to their high atom utilization efficiency.<\/p>\n

Recently, a research team led by Prof. Liu Licheng from the Qingdao Institute of Bioenergy and Bioprocess Technology<\/a> (QIBEBT) of the Chinese Academy of Science<\/a>s (CAS) proposed a two-step amination strategy to regulate the electronic structure of M-N\/C catalysts (M=Ni, Fe, Zn) and enhance the intrinsic activity of CO2<\/sub> electrocatalytic reduction.<\/p>\n

In the strategy, the M-N4<\/sub>\/C was aminated by annealing with carbamide in NH3<\/sub>, impregnation and hydrothermal reaction in ammonia water to synthesize final M-N4<\/sub>\/C-NH2<\/sub> catalysts.<\/p>\n

Although M-N\/C catalysts are widely used, they demonstrate a poor reaction current density, which is much worse than the current density of industrial level.<\/p>\n

In the study, the researchers used gas diffusion electrodes to create a reactive three-phase interface in a flow electrolyzer to increase the current density for CO production to industrial app<\/a>lication level.<\/p>\n

The aminated Ni single-atom catalyst demonstrated a remarkable current density of >400 mA cm-2<\/sup> with a nearly 90% Faraday efficiency for CO production, which is 1.8 times of that before amination.\n <\/p>\n\n

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Scientists propose novel bifunctional catalysts on biomass-derived carbon<\/a>\n <\/div>\n

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\n More information:<\/strong>
\n Zhipeng Chen et al, Amination strategy to boost CO2 electroreduction current density of M-N\/C single-atom catalysts to industrial application level, Energy & Environmental Science<\/i> (2021). DOI: 10.1039\/D0EE04052E<\/a><\/p><\/div>\n
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\n Chinese Academy of Sciences
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Citation<\/strong>:
\n Amination strategy improves efficiency of carbon dioxide electrocatalytic reduction (2021, February 19)
\n retrieved 19 February 2021
\n from https:\/\/techxplore.com\/news<\/a>\/2021-02-amination-strategy-efficiency-carbon-dioxide.html<\/p>\n

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