Syngas electrosynthesis using self-supplied CO2 from photoelectrocatalytic pollutant degradation

被引：32

作者：

Cui, Rongrong ^{[1
]}

Shen, Qi ^{[1
]}

Guo, Chenyan ^{[1
]}

Tang, Bo ^{[1
]}

Yang, Nianjun ^{[2
]}

Zhao, Guohua ^{[1
]}

机构：

[1] Tongji Univ, Sch Chem Sci & Engn, Shanghai Key Lab Chem Assessment & Susrmnabil, Shanghai 200092, Peoples R China

[2] Univ Siegen, Inst Mat Engn, D-57076 Siegen, Germany

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2020年 / 261卷

基金：

中国国家自然科学基金;

关键词：

Syngas; CO2; reduction; Photoelectrocatalysis; Phenol degradation; Copper; ELECTROCHEMICAL REDUCTION; FENTON; HYDROGENATION; GENERATION; INTERFACE; AEROGEL; FORMATE; METHANE;

D O I：

10.1016/j.apcatb.2019.118253

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Syngas has been synthesized via (photo) electrochemical CO2 reduction. Its amount and yield efficiency are determined the utilizable CO2. Here we show syngas electrosynthesis using self-supplied CO2, namely in situ generated CO2 from photoelectrocatalytic pollutant oxidation. In a single-chamber based two-electrode system, CO2 is produced continuously during photoelectrocatalytic phenol oxidization on the anode of TiO2 nanotubes decorated with Pd nanoparticles. Such in-situ generated CO2 is then reduced into CO at a Pd-Cu cathode. With a phenol oxidation efficiency of 87% and a faradaic efficiency of 75%, the syngas yield is as high as 339.3 mu mol. The ratio of carbon-to-hydrogen in syngas is variable from 0 to 1:10 under different current densities. The reactions for syngas generation are investigated using in-situ electrochemical infrared technique and confirmed to be C6H5OH -> CO2 -> CO2*-> COOH*-> CO*+H+-> CO+H-2. This study thus provides an approach to degrade pollutants and simultaneously utilize produced CO2 for the production of value-added chemicals like syngas.

引用

页数：8

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