期刊
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
卷 9, 期 4, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2021.105803
关键词
Photoelectrocatalysis; Photocatalysis; Added-value products; Methanol; Ethanol
资金
- Brazilian funding agency Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2015/18109-4, 2017/10118-0, 2019/04421-7, 2014/50945-1 INCT-DATREM]
- Brazilian funding agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq) [303759/2014-3, 409792/2018-7, 303351/2018-7, 405742/2018-5]
- Brazilian funding agency Fundacao de Apoio ao Desenvolvimento do Ensino, Ciencia e Tecnologia do Estado de Mato Grosso do Sul (Fundect-MS) [23/200.246/2014, 59/300.184/2016]
- Brazilian funding agency Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES) [001]
Research demonstrates that utilizing photoelectrocatalysis technology in CO2 reduction process, assembling materials containing low amounts of metals can efficiently produce methanol and ethanol, with higher efficiency compared to other techniques.
The photoelectrocatalysis (PEC) technique was applied in CO2 reduction using different proportions of Cu, Pd, and Pt supported on graphene nanoribbons (GNR) and deposited on the surfaces of TiO2 nanotubes. Altogether, nine combinations of TiO2-NT/GNR-metal were assembled, although only three of them efficiently promoted the generation of methanol and ethanol in high quantities. Comparison with the photocatalysis, photolysis, and electrocatalysis techniques showed the extremely high efficiency of PEC, which enabled production of methanol and ethanol at levels around 19.2-fold and 44.4-fold higher, respectively, than photocatalysis, the second most efficient technique. The presence of metallic nanoparticles in the system facilitated CO2 reduction due to the trapping of the photogenerated electrons, prolonging their lifetime, lowering the reaction energy barrier for CO2 reduction, and provided active intermediates. Therefore, the assembly of these materials containing low amounts of metals is highly promising, since it can assist in alleviating environmental problems caused by CO2 emissions, while at the same time enabling the energetically efficient generation of compounds of commercial value.
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