Ultrahigh‐Loading Zinc Single‐Atom Catalyst for Highly Efficient Oxygen Reduction in Both Acidic and Alkaline Media

Li, Jia; Chen, Siguo; Chen, Hou; Deng, Mingming; Ibraheem, Shumaila; Deng, Jianghai; Li, Jing; Li, Li; Wei, Zidong

doi:10.1002/anie.201902109

Cited by 531 publications

(354 citation statements)

References 20 publications

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“…The f‐FeCoNC‐900 exhibited an onset potential of 1.05 V and half‐wave potential of 0.89 V versus RHE, which outperformed the Pt/C catalyst in the alkaline solution. Li et al reported a Zn‐N‐C SAC with a high loading (9.33 wt%) of Zn atomically dispersed in the catalyst. This catalyst exhibited higher ORR activity and better stability than those of Fe‐N‐C catalysts in both acidic and alkaline media.…”

Section: Recent Advances Of Densely Populated Sacs In Catalytic Applimentioning

confidence: 98%

“…Generally, there are three key factors that significantly affect the mass loading of single atoms on the support: i) synthesis strategies, ii) precursors, and iii) substrates . For example, zinc single‐atom catalyst with an ultrahigh‐loading of 9.33 wt% has been successfully prepared by strictly controlling the gasification rate of ZnCl 2 precursor under a heating rate of 1 °C min −1 . The as‐obtained catalyst exhibited remarkable electrocatalytic activity and stability for the oxygen reduction reaction (ORR) in both alkaline and acidic solutions.…”

Section: Introductionmentioning

confidence: 99%

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Densely Populated Single Atom Catalysts

et al. 2019

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Developing highly efficient electrocatalysts with low cost is critical for the wide‐spread application of sustainable and renewable energy conversion technologies. Single‐atom catalysts (SACs) have attracted considerable attention owing to their high catalytic activity, selectivity, and stability. However, the high surface energy of the single atoms often results in an extremely low loading of metal atom catalysts with limited mass activity. In this context, densely populated SACs are more promising for practical applications due to their high active surface area and mass activity. Herein, the recent research progress of high loading (≥5 wt%) SACs for different electrocatalytic applications is summarized. An overview of various synthesis and characterization strategies of SACs is presented in this review. The influence of appropriate substrates on the preparation of high metal loading SACs is also discussed. In addition, this review provides valuable insights into the current challenges and future opportunities in the field of single‐atom catalysts.

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Section: Recent Advances Of Densely Populated Sacs In Catalytic Applimentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Densely Populated Single Atom Catalysts

et al. 2019

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“…Adapted with permission. [ 98 ] Copyright 2019, Wiley‐VCH Verlag GmbH & Co. KGaA, Weinheim. k) Pt‐based SAC (Pt1‐N/BP) is CO and CH 3 OH resistant, l) but the activity is still worse than the commercial Pt/C in 0.1 m HClO 4 .…”

Section: Molecular Design Of Sacs With Enhanced Orr Activitymentioning

confidence: 99%

Molecular Design of Single‐Atom Catalysts for Oxygen Reduction Reaction

Wan

Duan

Huang

2020

Advanced Energy Materials

339

210

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His thesis mainly focuses on developing graphene-based single-atom catalysts and the surface engineering of Pt-based nanostructures for energy conversion and storage. Xiangfeng Duan received his Ph.D. in physical chemistry from Harvard University and his B.S. degree in chemistry from the University of Science and Technology of China. His research group at UCLA focuses on developing new material systems for highly efficient energy harvesting, conversion, and storage via the rational design and nanoscale integration of distinct materials. Taking advantage of unique 2D materials, he conducts research on the facile and controllable synthesis of novel single atoms catalysts for energy demanding applications and investigates their structure-activity relationships at atomic level to improve their catalytic activity for future application in real-life devices. Yu Huang received her Ph.D. in physical chemistry from Harvard University and her B.S. degree in chemistry from the University of Science and Technology of China.Her research group at UCLA explores the unique technological opportunities that result from the structure and assembly of nanoscale building blocks. Focusing at phenomena that occur at molecular level, she aims to unravel the fundamental principles that govern the synthesis and assembly of nanoscale material. Moreover, she uses such principles to design nanostructures and nanodevices with unique functions and properties to address critical challenges in electronics, energy science, and biomedicine.

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“…The observed activity was partially attributed to the highly defective carbon black support containing large amounts of pyridine‐ and pyrrole‐like nitrogen dopants forming several Zn–N x active sites. Another report using Zn as single‐metal catalyst was published in 2019 by the group of Wei . In this occasion, the formation of Zn–N 4 moieties onto a carbon support was carried out by pyrolysis of poly( o ‐phenylenediamine) and ZnCl 2 .…”

Section: Non‐cobalt‐ or Iron‐based Electrocatalystsmentioning

confidence: 99%

Oxygen Reduction Reactions on Single‐ or Few‐Atom Discrete Active Sites for Heterogeneous Catalysis

Sharifi

Gracia‐Espino

Chen

et al. 2019

Advanced Energy Materials

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The oxygen reduction reaction (ORR) is of great importance in energy‐converting processes such as fuel cells and in metal–air batteries and is vital to facilitate the transition toward a nonfossil dependent society. The ORR has been associated with expensive noble metal catalysts that facilitate the O2 adsorption, dissociation, and subsequent electron transfer. Single‐ or few‐atom motifs based on earth‐abundant transition metals, such as Fe, Co, and Mo, combined with nonmetallic elements, such as P, S, and N, embedded in a carbon‐based matrix represent one of the most promising alternatives. Often these are referred to as single atom catalysts; however, the coordination number of the metal atom as well as the type and nearest neighbor configuration has a strong influence on the function of the active sites, and a more adequate term to describe them is metal‐coordinated motifs. Despite intense research, their function and catalytic mechanism still puzzle researchers. They are not molecular systems with discrete energy states; neither can they fully be described by theories that are adapted for heterogeneous bulk catalysts. Here, recent results on single‐ and few‐atom electrocatalyst motifs are reviewed with an emphasis on reports discussing the function and the mechanism of the active sites.

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Ultrahigh‐Loading Zinc Single‐Atom Catalyst for Highly Efficient Oxygen Reduction in Both Acidic and Alkaline Media

Cited by 531 publications

References 20 publications

Densely Populated Single Atom Catalysts

Densely Populated Single Atom Catalysts

Molecular Design of Single‐Atom Catalysts for Oxygen Reduction Reaction

Oxygen Reduction Reactions on Single‐ or Few‐Atom Discrete Active Sites for Heterogeneous Catalysis

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