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研究领域工程学化学工程能源和燃烧中的化学和热过程
有效的Cu2光阴管用于水性光电化学CO2和合成气的减少

有效的Cu2光阴管用于水性光电化学CO2和合成气的减少

Meng Xia ¹, Linfeng Pan ¹, Yongpeng Liu ², Jing Gao ¹, Jun Li ¹, Mounir Mensi ³, Kevin Sivula ², Shaik M Zakeeruddin ¹, Dan Ren ^1,4, Michael Grätzel ¹

Meng Xia ¹, Linfeng Pan ¹, Yongpeng Liu ²

¹Laboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
²Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.
³Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, CH-1951 Sion, Switzerland.
⁴School of Chemical Engineering and Technology, Xi'an Jiaotong University, 710049 Xi'an, China.

⁰Laboratory of Photonics and Interfaces, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland.

Journal of the American Chemical Society +

|

2023年十二月13日

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在PubMed上查看摘要

概括

此摘要是机器生成的。

研究人员开发了一种用于太阳能减排二氧化碳的新型光电极, 这种进步为从二氧化碳中生产可再生燃料和化学品提供了可持续的途径.

科学领域

电化学
材料科学
可再生能源

背景情况

光电化学二氧化碳减排 (PEC-CO2R) 是一个有前途的太阳能转换技术.
目前的PEC-CO2R系统通常依赖于昂贵的半导体和贵金属催化剂,限制了可扩展性.
太阳能转化为燃料 (STF) 仍然是可再生能源生产的关键挑战.

研究的目的

为PEC-CO2R开发一个具有成本效益和效率的光阴极.
调查使用Sn/SnO2催化剂修改的新型Cu2O/Ga2O3/TiO2光阴极的性能和选择性.
阐明负责提高PEC-CO2R性能的潜在机制.

主要方法

使用光电位制造Cu2O/Ga2O3/TiO2光阴极.
用Sn/SnO2催化剂对光阴极进行修改.
在KHCO3电解质中在AM1.5G照明下对光阴极的减碳性能评估.

主要成果

实现了约0.31%的二氧化碳减排半细胞STF效率.
具有高选择性的综合气 (FE: ~62%) 和酸盐 (FE: ~38%) 的有效生产.
在广泛的电位范围内观察到一致的选择性 (+0.34到 -0.16V与RHE).

结论

具有Sn/SnO2催化剂的Cu2O/Ga2O3/TiO2光阴极表现出PEC-CO2R的优异性能.
在Cu2O中埋藏的p-n连接处对于高光电压和高效的电荷分离至关重要.
/2催化剂作为活性位点和半导体前接触器发挥双重作用,促进电子转移.

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