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Gao C, Li L, Yan X, Zhang N, Bao J, Zhang X, Li Y. Triethylenediamine cobalt complex encapsulated in a metal-organic framework cage to prepare a cobalt single-atom catalyst with a high Co-N 4 density for an efficient oxygen reduction reaction. J Colloid Interface Sci 2024; 653:296-307. [PMID: 37717430 DOI: 10.1016/j.jcis.2023.09.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 08/18/2023] [Accepted: 09/05/2023] [Indexed: 09/19/2023]
Abstract
Transition metal single atom catalysts (TM SACs) are the most promising oxygen reduction reaction (ORR) catalysts for proton exchange membrane fuel cells (PEMFCs) and metal-air batteries. However, the low density of M-Nx active sites seriously hinders further improvement of the ORR electrocatalytic activity. Here, a strategy for encapsulating nitrogen-rich guest molecules (triethylenediamine cobalt complex, [Co(en)3]3+) was proposed to construct a high-performance cobalt single-atom catalyst (Co-encapsulated SAC/NC). With this strategy, the guest molecules are encapsulated into metal-organic framework (MOF) cages as an additional cobalt source to boost cobalt loading, while abundant nitrogen from guest molecules contributes to the formation of Co-N4 active sites. Remarkably, the resulting Co-encapsulated SAC/NC has a high cobalt loading amount of 4.03 wt%, and spherical aberration-corrected transmission electron microscopy (AC-TEM) has confirmed that most cobalt exists in a single-atom state. As a result, the Co-encapsulated SAC/NC exhibits excellent ORR catalytic performance with a half-wave potential of 0.88 V. Furthermore, Zn-air batteries employing Co-encapsulated SAC/NC as air cathode show high peak power density and excellent cycling stability. Density functional theory (DFT) calculations reveal that adjacent active sites have different rate-determining steps and lower reaction energy barriers than a single active site.
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Affiliation(s)
- Cheng Gao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Longzhu Li
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xiaoming Yan
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Ning Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Junjiang Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Xiaopeng Zhang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China; School of Chemical Engineering, Dalian University of Technology, Panjin 124221, China
| | - Yanqiang Li
- School of Materials Science and Engineering, North China University of Water Resources and Electric Power, Zhengzhou 450045, China.
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Li S, Chang F, Yuan Y, Zhu K, Chen W, Zhang Q, Lu Z, Bai Z, Yang L. Co-Fe 3C pair sites catalyst with heterometallic dual active sites for efficient oxygen reduction reaction. J Colloid Interface Sci 2023; 651:734-741. [PMID: 37567117 DOI: 10.1016/j.jcis.2023.08.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/25/2023] [Accepted: 08/05/2023] [Indexed: 08/13/2023]
Abstract
Newly emerging metal-based pair sites catalysts show great potential because they can provide more metal active centers with synergistic effect for green catalysis, compared with single site catalysts. However, both the synthesis and catalytic mechanisms of the pair sites catalyst with new structural features need to be developed vigorously to promote the desired chemical reactions, especially carbon-based metal catalysts for green energy storage and conversion devices. Herein, we constructed highly active Co-Fe3C pair sites on N-doped graphite catalyst (CNCo-Fe3C) by a two-step strategy, which have electron interactions of heterometallic atoms and can play better synergistic effect. X-ray absorption spectra and density functional theory (DFT) calculation further identify the presence of heterometallic active sites in the pair sites catalyst, resulting in electron redistribution and positive d-band center due to the electron interactions. The more positive d-band center model predicts the optimization of the adsorption energy of oxygen-containing intermediates, and reduces the energy barrier of the determining step. This further results in superior oxygen reduction reaction (ORR) performance with a half-wave potential of 0.90 V versus reversible hydrogen electrode (vs.RHE) and superior long-term stability for about 20 h with only 2.3 % decrease at 0.75 V vs.RHE in 0.1 M KOH solution. Additionally, it also shows significant peak power density of 124 mW cm-2 and prominent cycling stability performance exceeding 400 h at 5 mA cm-2 in the Zn-air battery (ZAB) test, which is higher than that of Pt/C catalyst. This work provides a new idea for the regulation of intrinsic activity of non-noble metal ORR catalysts through the synergistic effect of the pair sites.
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Affiliation(s)
- Shanshan Li
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Fangfang Chang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Yang Yuan
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Kai Zhu
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Wanting Chen
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Qing Zhang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China
| | - Zhansheng Lu
- School of Physics, Henan Key Laboratory of Photovoltaic Materials, Henan Normal University, Xinxiang, 453007, China.
| | - Zhengyu Bai
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
| | - Lin Yang
- Collaborative Innovation Center of Henan Province for Green Manufacturing of Fine Chemicals, Key Laboratory of Green Chemical Media and Reactions, Ministry of Education, School of Chemistry and Chemical Engineering, Henan Normal University, Xinxiang, Henan 453007, China.
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Zhao Q, Tan X, Liu T, Hou S, Ni W, Huang H, Zhang J, Yang Z, Li D, Hu H, Wu M. Engineering adjacent N, P and S active sites on hierarchical porous carbon nanoshells for superior oxygen reduction reaction and rechargeable Zn-air batteries. J Colloid Interface Sci 2023; 633:1022-1032. [PMID: 36516678 DOI: 10.1016/j.jcis.2022.11.144] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/26/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022]
Abstract
Heteroatom-doped carbon materials have been regarded as sustainable alternatives to the noble-metal catalysts for oxygen reduction reaction (ORR), while the catalytic performances still remain unsatisfactory. Herein, we develop a metal-free adjacent N, P and S-codoped hierarchical porous carbon nanoshells (NPS-HPCNs) through a novel layer-by-layer template coating method. The NPS-HPCNs is rationally fabricated by crosslinking of polyethyenemine (PEI) and phytic acid (PA) on nano-SiO2 template surface and subsequently coating of viscous sulfur-bearing petroleum pitch, followed by pyrolysis and alkaline etching. Soft X-ray absorption near-edge spectroscopy (XANES) analysis and density functional theory (DFT) calculations prove the engineering of adjacent N, P and S atoms to generate synergistic and reinforced active sites for oxygen electrocatalysis. The NPS-HPCNs manifests excellent ORR activity with a half-wave potential (E1/2) of 0.86 V, as well as promoted durability and methanol tolerance in alkaline medium. Remarkably, the NPS-HPCNs-based Zn-air battery delivers an open-circuit voltage of 1.479 V, a considerable peak power density of 206 mW cm-2 and robust cycling stability (over 200 h), even exceeding the commercial Pt/C catalyst. This study offers fundamental insights into the construction and synergistic mechanism of adjacent heteroatoms on carbon substrate, providing advanced metal-free electrocatalysts for Zn-air batteries and other energy conversion and storage devices.
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Affiliation(s)
- Qingshan Zhao
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Xiaojie Tan
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Tengfei Liu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Shuai Hou
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Wanxin Ni
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Hao Huang
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Jinqiang Zhang
- School of Chemical Engineering and Advanced Materials, The University of Adelaide, Adelaide, SA 5005, Australia
| | - Zhongxue Yang
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Dawei Li
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Han Hu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China
| | - Mingbo Wu
- State Key Laboratory of Heavy Oil Processing, College of Chemistry and Chemical Engineering, College of New Energy, China University of Petroleum (East China), Qingdao 266580, China.
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Li H, Shi H, Dai Y, You H, Raj Babu Arulmani S, Zhang H, Feng C, Huang L, Zeng T, Yan J, Liu X. A Co-doped Oxygen Reduction Catalyst with FeCu promotes the Stability of Microbial Fuel Cells. J Colloid Interface Sci 2022; 628:652-662. [DOI: 10.1016/j.jcis.2022.07.068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 06/30/2022] [Accepted: 07/11/2022] [Indexed: 11/28/2022]
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