构建 Bi2MoO6/柚皮衍生碳 0D/3D 异质结以增强全太阳光谱中的光热催化 CO2 还原,ACS Applied Energy Materials

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构建 Bi2MoO6/柚皮衍生碳 0D/3D 异质结以增强全太阳光谱中的光热催化 CO2 还原
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2023-02-23 , DOI: 10.1021/acsaem.2c03795
Mingnv Guo ₁ , Ziqi Wang _{2,

3} , Xiaolong Wu _{2,

3} , Jiaqi Qiu _{2,

3} , Linlin Gu ₁ , Zhongqing Yang _{2,

3}

Affiliation

_{载流子迁移限制一直是制约光热催化CO 2}还原的关键因素。为了进一步增强载流子传输，将 Bi ₂ MoO ₆量子点（BM QDs）沉积在碱活化柚皮衍生碳（CPP-A）的表面以构建 CPP-A/BM QDs 0D/3D 异质结。纸。BM量子点具有极短的载流子传输距离，并通过全太阳光谱的分级利用实现光热协同作用。CPP 的碳骨架促进了 BM 量子点（3 nm）的高分散，并使催化剂的局部表面温度迅速升高至 100 °C。_{热的关键作用增强了 CO 2}的扩散、吸附和载流子迁移过程_{并提供跨越CO 2}活化能垒的能量。更重要的是，CPP和BM QDs的含氧基团形成了C-O-Bi界面电子桥，为载流子跨界面传输提供了高速通道，使得BM QDs产生的大量电子快速迁移到CPP表面，诱导CPP作为一种新的富电子表面快速活化CO ₂，使CPP-A/BM量子点的CO产率达到61.44 μmol/(g·h)的超高产率，催化活性提高9.12次。

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Constructing Bi2MoO6/Pomelo-Peel-Derived Carbon 0D/3D Heterojunctions To Enhance Photothermal Catalytic CO2 Reduction in Full Solar Spectrum

The carrier migration limitation has been a key factor restricting the photothermal catalytic CO₂ reduction. To further enhance carrier transport, Bi₂MoO₆ quantum dots (BM QDs) are deposited on the surface of alkali-activated pomelo-peel-derived carbon (CPP-A) to construct CPP-A/BM QDs 0D/3D heterojunctions in this paper. BM QDs have extremely short carrier transport distances and achieve photothermal synergy through the graded utilization of the full solar spectrum. The carbon framework of CPP promotes the high dispersion of BM QDs (3 nm) and allows the local surface temperature of the catalyst to increase rapidly up to 100 °C. The critical role of heat enhances the diffusion, adsorption, and carrier migration processes of CO₂ and provides the energy to cross the CO₂ activation energy barrier. More importantly, the oxygen-containing groups of CPP and BM QDs form a C–O–Bi interfacial electron bridge, which provides a high-speed channel for carrier transport across the interface, allowing many electrons generated by BM QDs to migrate rapidly to the CPP surface, inducing CPP as a new electron-rich surface for rapid CO₂ activation, which results in an ultrahigh CO yield of 61.44 μmol/(g·h) for CPP-A/BM QDs, and the catalytic activity is increased by 9.12 times.

更新日期：2023-02-23

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