Active site engineering of atomically dispersed transition metal-heteroatom-carbon catalysts for oxygen reduction.
Abstract: Owing to the advantage of atomic utilization, the single-atom catalyst has attracted much attention and been employed in multifarious catalytic reactions. Its definite site configuration is favorable for exploring the actual active centers and corresponding reaction mechanism. At the atomic scale, the tunable site configuration, from central metal atoms, coordinated heteroatoms, peripheral dopants, and feasible polymetallic centers to the synergetic intrinsic carbon defects, can effectively augment the intrinsic activity for oxygen reduction reaction (ORR). From a practical viewpoint, the propagation strategies of single-atom sites, the loading-activity relation and the structural retention during practical tests are crucial for the industrial applications. Furthermore, the activity contribution of multiple additional active centers including the active carbon sites and the pony-size well-wrapped metal species should be acknowledged. From the perspective mentioned above, this paper thoroughly analyses the consensuses, controversies, challenges and possible solutions based on the current research progress, thereby providing inspiration and guidance for the active center engineering of single-atom catalysts.
Publication Date: 2021-07-22 PubMed ID: 34286732DOI: 10.1039/d1cc03076kGoogle Scholar: Lookup
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Summary
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This research discusses the enhancement of single-atom catalysts for the oxygen reduction reaction (ORR) by modifying their site configurations. The analysis also takes into account practical considerations such as the propagation strategies of single-atom sites, structural retention during tests, and activity contribution from multiple active centers for industrial applications.
Understanding Single-atom Catalysts
- Single-atom catalysts have become a topic of interest due to their efficient atomic utilization. They are used in various types of catalytic reactions.
- Their definite site configuration (the arrangement of central metal atoms, coordinated heteroatoms, peripheral dopants, polymetallic centers, and synergic intrinsic carbon defects) is beneficial for determining the actual active centers and understanding the reaction mechanisms involved.
- At the atomic level, making adjustments in the site configuration can significantly enhance the intrinsic activity for the oxygen reduction reaction (ORR), a process widely used in fuel cells and metal-air batteries.
Practical Factors and Industrial Applications
- From an industrial perspective, the research acknowledges the importance of certain practical factors. These include strategies for the propagation (spread and increase) of single-atom sites, the relationship between catalyst loading and activity, and the retention of the catalyst’s structural properties during practical tests.
- Apart from the single metal atoms, other active centres also contribute to the overall activity of the catalyst. These include active carbon sites and small well-wrapped metal species.
Analyzing Current Research, Challenges, and Possibilities
- The paper thoroughly examines the agreements and disagreements present in current research, the challenges faced, and potential solutions for these challenges.
- By doing so, the researchers aim to provide guidance and inspiration for future work in the engineering of active centers in single-atom catalysts.
Cite This Article
APA
Zhu J, Mu S.
(2021).
Active site engineering of atomically dispersed transition metal-heteroatom-carbon catalysts for oxygen reduction.
Chem Commun (Camb), 57(64), 7869-7881.
https://doi.org/10.1039/d1cc03076k Publication
Researcher Affiliations
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China. msc@whut.edu.cn and Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China.
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China. msc@whut.edu.cn and Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Xianhu Hydrogen Valley, Foshan 528200, P. R. China.
Citations
This article has been cited 2 times.- Đukić T, Pavko L, Jovanovič P, Maselj N, Gatalo M, Hodnik N. Stability challenges of carbon-supported Pt-nanoalloys as fuel cell oxygen reduction reaction electrocatalysts.. Chem Commun (Camb) 2022 Dec 15;58(100):13832-13854.
- Chen G, Zhong H, Feng X. Active site engineering of single-atom carbonaceous electrocatalysts for the oxygen reduction reaction.. Chem Sci 2021 Dec 15;12(48):15802-15820.
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