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Ni C, Huang S, Koudama TD, Wu X, Cui S, Shen X, Chen X. Tuning the Electronic Structure of a Novel 3D Architectured Co-N-C Aerogel to Enhance Oxygen Evolution Reaction Activity. Gels 2023; 9:gels9040313. [PMID: 37102925 PMCID: PMC10137415 DOI: 10.3390/gels9040313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 04/28/2023] Open
Abstract
Hydrogen generation through water electrolysis is an efficient technique for hydrogen production, but the expensive price and scarcity of noble metal electrocatalysts hinder its large-scale application. Herein, cobalt-anchored nitrogen-doped graphene aerogel electrocatalysts (Co-N-C) for oxygen evolution reaction (OER) are prepared by simple chemical reduction and vacuum freeze-drying. The Co (0.5 wt%)-N (1 wt%)-C aerogel electrocatalyst has an optimal overpotential (0.383 V at 10 mA/cm2), which is significantly superior to that of a series of M-N-C aerogel electrocatalysts prepared by a similar route (M = Mn, Fe, Ni, Pt, Au, etc.) and other Co-N-C electrocatalysts that have been reported. In addition, the Co-N-C aerogel electrocatalyst has a small Tafel slope (95 mV/dec), a large electrochemical surface area (9.52 cm2), and excellent stability. Notably, the overpotential of Co-N-C aerogel electrocatalyst at a current density of 20 mA/cm2 is even superior to that of the commercial RuO2. In addition, density functional theory (DFT) confirms that the metal activity trend is Co-N-C > Fe-N-C > Ni-N-C, which is consistent with the OER activity results. The resulting Co-N-C aerogels can be considered one of the most promising electrocatalysts for energy storage and energy saving due to their simple preparation route, abundant raw materials, and superior electrocatalytic performance.
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Affiliation(s)
- Chunsheng Ni
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Shuntian Huang
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Tete Daniel Koudama
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Xiaodong Wu
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Sheng Cui
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Xiaodong Shen
- College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Xiangbao Chen
- AECC Beijing Institute of Aeronautical Materials, Beijing 100095, China
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Lu Y, Wang Y, Li H, Li P, Feng X, Yamamoto Y, Bao M, Liu J. Unsupported nanoporous gold catalyst for highly selective hydroamination of alkynes. RSC Adv 2023; 13:3371-3376. [PMID: 36756435 PMCID: PMC9869862 DOI: 10.1039/d2ra07120g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 01/17/2023] [Indexed: 01/25/2023] Open
Abstract
An efficient and highly selective heterogeneous catalyst system for hydroamination of alkynes was developed using unsupported gold nanopores (AuNPore) for the first time. The AuNPore-catalyzed highly regioselective hydroamination of alkynes proceeded smoothly without any additive and solvent under mild conditions (rt-50 °C) to yield Markovnikov imines in satisfactory to excellent yields. No gold leached from AuNPore during the hydroamination of alkynes. Moreover, the catalyst was easily recovered and reused without any loss of catalytic activity. A one-pot, two-step procedure using a single AuNPore catalyst has been devised to produce secondary amines derived from readily available alkynes and anilines with high atom efficiency.
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Affiliation(s)
- Ye Lu
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia Minzu University Tongliao 028000 China
| | - Ying Wang
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia Minzu University Tongliao 028000 China
| | - He Li
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia Minzu University Tongliao 028000 China
| | - Peihe Li
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia Minzu University Tongliao 028000 China
| | - Xiujuan Feng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116023 China
| | - Yoshinori Yamamoto
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116023 China .,Department of Chemistry, Graduate School of Science, Tohoku University Sendai 980-8577 Japan.,Research Organization of Science and Technology, Ritsumeikan University Kusatsu Shiga 525-8577 Japan
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology Dalian 116023 China
| | - Jinghai Liu
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia Minzu University Tongliao 028000 China
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Lu Y, Wang J, Feng X, Li Y, Zhang W, Yamamoto Y, Bao M. Hydrogenation of nitriles to primary amines catalyzed by an unsupported nanoporous palladium catalyst: understanding the essential reason for the high activity and selectivity of the catalyst. NANOSCALE 2022; 14:9341-9348. [PMID: 35704927 DOI: 10.1039/d2nr01722a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
An efficient and highly selective heterogeneous catalyst system for nitrile hydrogenation was developed using unsupported palladium nanopores (PdNPore). The PdNPore-catalyzed selective hydrogenation of nitriles proceeded smoothly, without any additives, under mild conditions (low H2 pressure and low temperature) to yield primary amines with satisfactory to excellent yields. Systematic studies demonstrated that the high activity and excellent selectivity of the PdNPore originated from its good Lewis acidity and porous structure. No palladium leached from the PdNPore during the hydrogenation reaction. Moreover, the catalyst was easily recovered and reused without any loss of catalytic activity. A deuterium-hydrogen exchange reaction clearly indicated that the present hydrogenation involves heterolytic H2 splitting on the surface of the PdNPore catalyst.
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Affiliation(s)
- Ye Lu
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China.
- Inner Mongolia Key Laboratory of Carbon Nanomaterials, Nano Innovation Institute (NII), College of Chemistry and Materials Science, Inner Mongolia University for Nationalities, Tongliao 028000, China
| | - Jixiao Wang
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China.
| | - Xiujuan Feng
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China.
| | - Yanhui Li
- School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China.
| | - Wei Zhang
- School of Materials Science and Engineering, Dalian University of Technology, Dalian 116023, China.
| | - Yoshinori Yamamoto
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China.
- Department of Chemistry, Graduate School of Science, Tohoku University, Sendai 980-8577, Japan
- Research Organization of Science and Technology, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
| | - Ming Bao
- State Key Laboratory of Fine Chemicals, Dalian University of Technology, Dalian 116023, China.
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Han J, Johnson I, Chen M. 3D Continuously Porous Graphene for Energy Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2022; 34:e2108750. [PMID: 34870863 DOI: 10.1002/adma.202108750] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Revised: 12/01/2021] [Indexed: 06/13/2023]
Abstract
Constructing bulk graphene materials with well-reserved 2D properties is essential for device and engineering applications of atomically thick graphene. In this article, the recent progress in the fabrications and applications of sterically continuous porous graphene with designable microstructures, chemistries, and properties for energy storage and conversion are reviewed. Both template-based and template-free methods have been developed to synthesize the 3D continuously porous graphene, which typically has the microstructure reminiscent of pseudo-periodic minimal surfaces. The 3D graphene can well preserve the properties of 2D graphene of being highly conductive, surface abundant, and mechanically robust, together with unique 2D electronic behaviors. Additionally, the bicontinuous porosity and large curvature offer new functionalities, such as rapid mass transport, ample open space, mechanical flexibility, and tunable electric/thermal conductivity. Particularly, the 3D curvature provides a new degree of freedom for tailoring the catalysis and transport properties of graphene. The 3D graphene with those extraordinary properties has shown great promises for a wide range of applications, especially for energy conversion and storage. This article overviews the recent advances made in addressing the challenges of developing 3D continuously porous graphene, the benefits and opportunities of the new materials for energy-related applications, and the remaining challenges that warrant future study.
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Affiliation(s)
- Jiuhui Han
- WPI Advanced Institute for Materials Research, Tohoku University, Sendai, 980-8577, Japan
- Frontier Research Institute for Interdisciplinary Sciences (FRIS), Tohoku University, Sendai, 980-8578, Japan
| | - Isaac Johnson
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Mingwei Chen
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
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Qin Y, Wu X, Zhou N, Xu H, Tan J, Chen X, Peng Z, Nie C. The simulation study of transport performance of HU drugs on functionalized graphene nanosheets based on the Density Functional Theory. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Zhang Y, Lyu J, Zhao YL, Hu K, Chen Z, Lin X, Xie G, Liu X, Qiu HJ. In situ coupling of Ag nanoparticles with high-entropy oxides as highly stable bifunctional catalysts for wearable Zn-Ag/Zn-air hybrid batteries. NANOSCALE 2021; 13:16164-16171. [PMID: 34543369 DOI: 10.1039/d1nr03539h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
With the combination of the advantages of both Zn-Ag and Zn-air batteries, hybrid Zn-Ag/Zn-air batteries nevertheless suffer greatly from structural instability and activity degradation of the catalysts at the air electrodes. Herein, we introduce a scalable chemical dealloying procedure to synthesize mutually interacting and stable bifunctional catalysts, consisting of imbedded Ag nanoparticles for the oxygen reduction reaction (ORR) and quantitatively designed multicomponent high-entropy oxides (HEOs) for the oxygen evolution reaction (OER). The ORR performance and the Zn-Ag battery capacity can be precisely controlled by the content of Ag nanoparticles. Impressively, with a significantly low Ag content (∼9.13 wt%) in the bifunctional (AlNiCoFeCr)3O4/Ag, our hybrid Zn-Ag/Zn-air batteries using such catalysts are able to be continuously charged/discharged for more than 450 h and deliver a high energy density of 810 W h kg-1. We expect that these stabilized noble metals in HEO nanocomposites may work as multifunctional electrocatalysts in many other energy conversion devices.
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Affiliation(s)
- Yanyi Zhang
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Juan Lyu
- School of Physics Science and Technology, Inner Mongolia University, Hohhot 010021, China
| | - Yi-Lu Zhao
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Kailong Hu
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Zuhuang Chen
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Xi Lin
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Guoqiang Xie
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Xingjun Liu
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
- Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials, Shenzhen, 518055, China
| | - Hua-Jun Qiu
- School of Materials Science and Engineering and Institute of Blockchain Research and Development, Harbin Institute of Technology, Shenzhen, 518055, China.
- Shenzhen R&D Center for Al-based Hydrogen Hydrolysis Materials, Shenzhen, 518055, China
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