Engineering single MnN4 atomic active sites on polydopamine-modified helical carbon tubes towards efficient oxygen reduction

Tian, Han; Cui, Xiangzhi; Dong, Hongliang; Meng, Guangyao; Kong, Fantao; Chen, Yafeng; Peng, Licong; Chen, Chang; Chang, Ziwei; Shi, Jianlin

doi:10.1016/j.ensm.2021.02.017

Cited by 52 publications

(40 citation statements)

References 25 publications

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“…[132] The existence of heteroatoms or the second phase particles will influence the catalytic activity for ORR. [131,207,208] N species can enhance the intrinsic activity of the metal sites, mainly ascribed to the modification of the electronic distribution and helpful trapping of the metal atoms to increase the density of active sites. [209] Meanwhile, pyrrole-type N coordination can greatly modify the atomic and electronic structure of the FeN 4 sites to prefer O 2 adsorption energy and the 4e − pathway, resulting in enhanced intrinsic ORR activity.…”

Section: M-n-c Of Mn 4 Sites For Orrmentioning

confidence: 99%

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

et al. 2021

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Metal-nitrogen-carbon (M-N-C) material with specifically coordinated configurations is a promising alternative to costly Pt-based catalysts. In the past few years, great progress is made in the studies of M-N-C materials, including the structure modulation and local coordination environment identification via advanced synthetic strategies and characterization techniques, which boost the electrocatalytic performances and deepen the understanding of the underlying fundamentals. In this review, the most recent advances of M-N-C catalysts with specifically coordinated configurations of M-N x (x = 1-6) are summarized as comprehensively as possible, with an emphasis on the synthetic strategy, characterization techniques, and applications in typical electrocatalytic reactions of the oxygen reduction reaction, oxygen evolution reaction, hydrogen evolution reaction, CO 2 reduction reaction, etc., along with mechanistic exploration by experiments and theoretical calculations. Furthermore, the challenges and potential perspectives for the future development of M-N-C catalysts are discussed.

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Section: M-n-c Of Mn 4 Sites For Orrmentioning

confidence: 99%

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

et al. 2021

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“…Recently, Shi's group designed spiral graphitized carbon nanotubes to achieve more separated Mn atoms coordinated with nitrogen (Figure 9e and f). [63] Mn was introduced by adding KMnO 4 to form MnN 4 as active sites. After pyrolyzing the precursor at 700 °C, spiral MnNC-PDA-700 with polydopamine was obtained.…”

Section: Materials With Novel Spiral Structurementioning

confidence: 99%

The Role of Surface Curvature in Electrocatalysts

Wang

Bao

Shi

et al. 2021

Chemistry A European J

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Excessive consumption of fossil fuels has caused unavoidable environmental problems. The development of renewable and clean alternatives is essential for the sustainable and green development of human society. Electrocatalysts are most important parts in these energy-related devices. Recently, scientists found that the surface curvature of electrocatalysts could play an important role for the improvement of catalytic performance and the optimization of intrinsic catalytic activity during electrocatalytic process. The role of surface curvature in electrocatalysts is still under investigating. In this minireview, we summarized the latest progress of electrocatalysts with different surface curvatures and their applications in energy-related applications. This review mainly involves the strategies for preparation of electrocatalysts with different surface curvatures, three typical electrocatalysts with different surface curvatures (curled surface, onion-like structure, and spiral structure), and the potential mechanisms that surface curvature in electrocatalysts affects activities.

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“…The ever-increasing energy demands have prompted humans to develop sustainable energy technologies such as hydrogen energy, metal-air batteries, and water splitting devices. [1] The three fundamental electrochemical reactions, namely, metal oxides, [8] alloys, [9] nitrides, [10] phosphides, [11] and chalcogenides, [12] exhibit significant potential as alternatives for noble metal-based catalysts owing to their advantages such as adjustable electronic structures and low costs. [13] In particular, transition metal chalcogenides (TMCs) are considered promising multifunctional catalysts for the ORR, OER, and HER processes because of their diverse electronic properties, high activities, and unsaturated active sites.…”

Section: Introductionmentioning

confidence: 99%

Dianion Induced Electron Delocalization of Trifunctional Electrocatalysts for Rechargeable Zn–Air Batteries and Self‐Powered Water Splitting

Ding

Jin

et al. 2022

Adv Funct Materials

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The development of low-cost multifunctional electrocatalysts with high activity for the hydrogen evolution reaction (HER), oxygen evolution reaction (OER), and oxygen reduction reaction (ORR) is critical for the advancement of sophisticated energy conversion and storage devices. Herein, a trifunctional Ni(S 0.51 Se 0.49 ) 2 @NC catalyst is designed and fabricated using a dianionic regulation strategy. Synchrotron radiation X-ray absorption spectroscopy and density functional theory calculations reveal that simultaneous sulfidation and selenization can induce the electronic delocalization of Ni(S 0.51 Se 0.49 ) 2 active sites to enhance the adsorption of *OOH/*OH intermediate for ORR/OER and H* intermediate for HER. The OER and HER mechanisms are revealed by in situ Raman spectroscopy. The Ni(S 0.51 Se 0.49 ) 2 @NC exhibits trifunctional catalytic activity for the HER (111 mV at 10 mA cm −2 ), OER (320 mV at 10 mA cm −2 ), and ORR (half-wave potential of 0.83 V). The rechargeable zinc-air batteries (ZABs) exhibit an open-circuit voltage of 1.46 V, a specific capacity of 799.1 mAh g −1 , and excellent stability for 1000 cycles. The water electrolytic cell using Ni(S 0.51 Se 0.49 ) 2 @NC electrodes delivers a current density of 10 mA cm −2 at a cell voltage of 1.59 V, and it can be powered using the constructed ZABs. These findings contribute to developing low-cost and efficient non-noble metal multifunctional catalysts.

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Engineering single MnN4 atomic active sites on polydopamine-modified helical carbon tubes towards efficient oxygen reduction

Cited by 52 publications

References 25 publications

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

Metal–Nitrogen–Carbon Catalysts of Specifically Coordinated Configurations toward Typical Electrochemical Redox Reactions

The Role of Surface Curvature in Electrocatalysts

Dianion Induced Electron Delocalization of Trifunctional Electrocatalysts for Rechargeable Zn–Air Batteries and Self‐Powered Water Splitting

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