Efficient solar-driven electrochemical CO2 reduction to hydrocarbons and oxygenates,Energy & Environmental Science

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Efficient solar-driven electrochemical CO2 reduction to hydrocarbons and oxygenates
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2017-08-31 00:00:00 , DOI: 10.1039/c7ee01764b
Gurudayal Gurudayal _{1,

2,

3,

4,

5} , James Bullock _{4,

5,

6,

7,

8} , Dávid F. Srankó _{1,

2,

3,

4,

5} , Clarissa M. Towle _{4,

5,

7,

8,

9} , Yanwei Lum _{1,

2,

3,

4,

5} , Mark Hettick _{4,

5,

6,

7,

8} , M. C. Scott _{4,

5,

7,

9,

10} , Ali Javey _{4,

5,

6,

7,

8} , Joel Ager _{1,

2,

3,

4,

5}

Affiliation

Solar to chemical energy conversion could provide an alternative to mankind's unsustainable use of fossil fuels. One promising approach is the electrochemical reduction of CO₂ into chemical products, in particular hydrocarbons and oxygenates which are formed by multi-electron transfer reactions. Here, a nanostructured Cu–Ag bimetallic cathode is utilized to selectively and efficiently facilitate these reactions. When operated in an electrolysis cell, the cathode provides a constant energetic efficiency for hydrocarbon and oxygenate production. As a result, when coupled to Si photovoltaic cells, solar conversion efficiencies of 3–4% to the target products are achieved for 0.35 to 1 Sun illumination. Use of a four-terminal III–V/Si tandem solar cell configuration yields a conversion efficiency to hydrocarbons and oxygenates exceeding 5% at 1 Sun illumination. This study provides a clear framework for the future advancement of efficient solar-driven CO₂ reduction devices.

中文翻译：

高效的太阳能驱动的电化学CO ₂还原为碳氢化合物和含氧化合物

从太阳能到化学能的转化可以为人类不可持续地使用化石燃料提供替代方案。一种有前途的方法是电化学还原CO ₂分解成化学产物，特别是通过多电子转移反应形成的碳氢化合物和含氧化合物。在这里，使用纳米结构的Cu-Ag双金属阴极来选择性和有效地促进这些反应。当在电解池中运行时，阴极为烃和含氧化合物的生产提供了恒定的能量效率。结果，当与Si光伏电池耦合时，对于0.35比1的太阳照度，目标产品的太阳能转换效率达到3-4％。使用四端子III–V / Si串联太阳能电池配置可在1个太阳光照下产生超过5％的碳氢化合物和含氧化合物的转换效率。这项研究为高效太阳能驱动的CO ₂还原设备的未来发展提供了清晰的框架。

更新日期：2017-09-15

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