Single PEDOT Catalyst Boosts CO2 Photoreduction Efficiency

被引:18
作者
Diao, Yifan [1 ]
Jung, Sungyoon [2 ]
Kouhnavard, Mojgan [2 ]
Woon, Reagan [3 ]
Yang, Haoru [3 ]
Biswas, Pratim [1 ,2 ]
D'arcy, Julio M. [1 ,3 ]
机构
[1] Washington Univ, Inst Mat Sci & Engn, St Louis, MO 63130 USA
[2] Washington Univ, Dept Energy Environm & Chem Engn, St Louis, MO 63130 USA
[3] Washington Univ, Dept Chem, St Louis, MO 63130 USA
关键词
PHOTOCATALYTIC REDUCTION; CARBON-DIOXIDE; ABSORPTION; COPOLYMER; SPHERES; TIO2; H2O; CH4;
D O I
10.1021/acscentsci.1c00712
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Atmospheric pollution demands the development of solar-driven photocatalytic technologies for the conversion of CO2 into a fuel; state-of-the-art cocatalyst systems demonstrate conversion efficiencies currently unattainable by a single catalyst. Here, we upend the status quo demonstrating that the nanofibrillar conducting polymer poly(3,4-ethylenedioxythiophene) (PEDOT) is a record-breaking single catalyst for the photoreduction of CO2 to CO. This high catalytic efficiency stems from a highly conductive nanofibrillar structure that significantly enhances surface area, CO2 adsorption and light absorption. Moreover, the polymer's band gap is optimized via chemical doping/dedoping treatments using hydrochloric acid, ammonia hydroxide, and hydrazine. The hydrazine-treated PEDOT catalyst exhibits 100% CO yield under a stable regime (>10 h) with a maximum rate of CO evolution (3000 mu mol g(cat)(-1) h(-1)) that is 2 orders of magnitude higher than the top performing single catalyst and surpassed only by three other cocatalyst systems. Nanofibrillar PEDOT provides a new direction for designing the next generation of high-efficiency photoreduction catalysts.
引用
收藏
页码:1668 / 1675
页数:8
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