State-of-the-art advancements in photo-assisted CO<sub>2</sub> hydrogenation: recent progress in catalyst development and reaction mechanisms

Yang, Zhengyi; Yuan, Qi; Wang, Fenglong; Han, Zejun; Jiang, Yanyan; Han, Huijian; Liu, Jiurong; Xue, Zhang; Ong, Wee‐Jun

doi:10.1039/d0ta08781e

Cited by 46 publications

(28 citation statements)

References 170 publications

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“…The CO 2 adsorption capacity of a photocatalyst plays a prevailing role in catalyzing CO 2 reduction. [285] Nevertheless, previous studies pointed out that the CO 2 adsorption ability of pristine g-C 3 N 4 is rather weak. [200] Either vacancies or dopants can be beneficial for enhancing the adsorption capacity of g-C 3 N 4 .…”

Section: Carbon Dioxide Reductionmentioning

confidence: 99%

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C₃N₄) Photocatalysts toward Artificial Photosynthesis

Putri

et al. 2021

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Graphitic carbon nitride (g‐C3N4) is a kind of ideal metal‐free photocatalysts for artificial photosynthesis. At present, pristine g‐C3N4 suffers from small specific surface area, poor light absorption at longer wavelengths, low charge migration rate, and a high recombination rate of photogenerated electron–hole pairs, which significantly limit its performance. Among a myriad of modification strategies, point‐defect engineering, namely tunable vacancies and dopant introduction, is capable of harnessing the superb structural, textural, optical, and electronic properties of g‐C3N4 to acquire an ameliorated photocatalytic activity. In view of the burgeoning development in this pacey field, a timely review on the state‐of‐the‐art advancement of point‐defect engineering of g‐C3N4 is of vital significance to advance the solar energy conversion. Particularly, insights into the intriguing roles of point defects, the synthesis, characterizations, and the systematic control of point defects, as well as the versatile application of defective g‐C3N4‐based nanomaterials toward photocatalytic water splitting, carbon dioxide reduction and nitrogen fixation will be presented in detail. Lastly, this review will conclude with a balanced perspective on the technical and scientific hindrances and future prospects. Overall, it is envisioned that this review will open a new frontier to uncover novel functionalities of defective g‐C3N4‐based nanostructures in energy catalysis.

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Section: Carbon Dioxide Reductionmentioning

confidence: 99%

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C₃N₄) Photocatalysts toward Artificial Photosynthesis

Putri

et al. 2021

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“…Meanwhile, according to the above results and analysis, the band structures of TiO 2 and ZnIn 2 S 4 are presented in Figure 4d. Noticeably, the reduction potentials of CO, CH 3 OH and CH 4 are -0.12, 0.03 and 0.17 V, respectively, [27,58,65] implying that TiO 2 and ZnIn 2 S 4 are thermodynamically feasible for converting CO 2 into CO, CH 3 OH and CH 4 (Figure 4d).…”

Section: Introductionmentioning

confidence: 99%

In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

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Zhang

et al. 2021

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Recently, a novel step-scheme (S-scheme) heterojunction was proposed and has attracted researchers' attention. [23][24][25][26][27][28][29][30][31][32][33][34][35][36] Usually, S-scheme heterojunction consists of reduction photocatalyst (RP) and oxidation photocatalyst (OP). Besides, the directional migration of free electrons will lead to band bending and internal electric field (IEF) at their interface owing to the work function difference. Notably, under the influence of IEF, the photogenerated electrons of OP with weak reduction ability can recombine with the photogenerated holes of RP with weak oxidation ability; while those with strong redox abilities are preserved. Therefore, reasonable construction of TiO 2 -based S-scheme heterojunction is of great significance to improve photocatalytic reaction performance. Apart from the charge carrier separation, the morphology of photocatalysts is another important factor to influence the photocatalytic performance. [15,17,19,37,38] Photocatalysts with hollow structures have attracted great attention owing to manifold advantages including larger specific surface area, abundant active sites, shortened diffusion distance as well as improved light reflection and scattering. [37,[39][40][41][42][43][44] Therefore, the design of hollow S-scheme heterojunction photocatalyst is of vital importance to enhance photocatalytic performance.ZnIn 2 S 4 , as a typical reduction photocatalyst, stands out for its layered structure, narrow bandgap, suitable redox potentials, and good chemical stability. And it has been used for various photocatalytic applications including hydrogen production, CO 2 reduction, and organic degradation. [45][46][47][48][49][50][51] Unfortunately, pristine ZnIn 2 S 4 photocatalyst shows low photocatalytic efficiency owing to the fast recombination of photogenerated charge carriers. [45][46][47][48][49] Considering the suitable match of band gap of ZnIn 2 S 4 and TiO 2 for S-scheme heterojunction, [27,52] we construct the hollow TiO 2 @ZnIn 2 S 4 core-shell structure. Up to now, to the best of our knowledge, it has never been reported.Herein, we grow ZnIn 2 S 4 nanosheets on the outer surface of TiO 2 hollow spheres by in situ chemical bath deposition reaction. This rational design is not only able to provide large specific surface areas and abundant reaction sites for PCR reaction, but also can effectively suppress the recombination of useful photogenerated electrons and holes. As a result, the optimized TiO 2 @ZnIn 2 S 4 heterojunction exhibits high PCR performance, and the total CO 2 photoreduction conversion rates (the sum yield of CO, CH 3 OH and CH 4 ) are obviously higher than those of blank ZnIn 2 S 4 , TiO 2 , and ex situ prepared TiO 2 -ZnIn 2 S 4 composite. Finally, S-scheme mechanism is also thoroughly analyzed and discussed in this work.Reasonable design of efficient hierarchical photocatalysts has gained significant attention. Herein, a step-scheme (S-scheme) core-shell TiO 2 @ZnIn 2 S 4 heterojunction is designed for photocatalytic CO 2 redu...

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“…1–4 CO 2 hydrogenation has also been considered to be promising for energy storage. 5–7 Many catalysts have been exploited and reported for CO 2 hydrogenation. 8–22 Among all the catalysts exploited, supported nickel catalysts are promising because of their high activity and relatively low price.…”

Section: Introductionmentioning

confidence: 99%

Advances in studies of the structural effects of supported Ni catalysts for CO₂hydrogenation: from nanoparticle to single atom catalyst

et al. 2022

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State-of-the-art advancements in photo-assisted CO₂ hydrogenation: recent progress in catalyst development and reaction mechanisms

Abstract: The excessive anthropogenic CO2 emission caused by the combustion of fossil resources has caused serious global ecological and energy problems in recent decades. As one of the most effective solutions...

Cited by 46 publications

References 170 publications

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C₃N₄) Photocatalysts toward Artificial Photosynthesis

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C₃N₄) Photocatalysts toward Artificial Photosynthesis

In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

Advances in studies of the structural effects of supported Ni catalysts for CO₂hydrogenation: from nanoparticle to single atom catalyst

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State-of-the-art advancements in photo-assisted CO2 hydrogenation: recent progress in catalyst development and reaction mechanisms

Abstract: The excessive anthropogenic CO2 emission caused by the combustion of fossil resources has caused serious global ecological and energy problems in recent decades. As one of the most effective solutions...

Cited by 46 publications

References 170 publications

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C3N4) Photocatalysts toward Artificial Photosynthesis

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C3N4) Photocatalysts toward Artificial Photosynthesis

In situ Irradiated XPS Investigation on S‐Scheme TiO2@ZnIn2S4 Photocatalyst for Efficient Photocatalytic CO2 Reduction

Advances in studies of the structural effects of supported Ni catalysts for CO2hydrogenation: from nanoparticle to single atom catalyst

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State-of-the-art advancements in photo-assisted CO₂ hydrogenation: recent progress in catalyst development and reaction mechanisms

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C₃N₄) Photocatalysts toward Artificial Photosynthesis

Point‐Defect Engineering: Leveraging Imperfections in Graphitic Carbon Nitride (g‐C₃N₄) Photocatalysts toward Artificial Photosynthesis

In situ Irradiated XPS Investigation on S‐Scheme TiO₂@ZnIn₂S₄ Photocatalyst for Efficient Photocatalytic CO₂ Reduction

Advances in studies of the structural effects of supported Ni catalysts for CO₂hydrogenation: from nanoparticle to single atom catalyst