Molten salt synthesis of ZIF derived CoFe alloy embedded in 2D ultrathin N-doped porous carbon nanosheets for efficient alkaline media oxygen electrocatalysis

Zhou, Jiaqi; Yang, Chunyan; Cui, Rongqian; Wang, Dan; Zhao, Yafei; Xiang, Xu; Pang, Xinchang; Zhang, Bing; Shang, Huishan

doi:10.1016/j.jallcom.2023.168792

Journal of Alloys and Compounds

2023

DOI: 10.1016/j.jallcom.2023.168792

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Molten salt synthesis of ZIF derived CoFe alloy embedded in 2D ultrathin N-doped porous carbon nanosheets for efficient alkaline media oxygen electrocatalysis

Jiaqi Zhou

Chunyan Yang

Rongqian Cui

et al.

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Cited by 11 publications

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“…Moderate temperatures, however, are more conducive to metal loading and material carbonization, thereby influencing the catalytic activity of the catalyst. 12 In this study, RHPC, AB, and coconut shell carbon (YP-50)three inexpensive commercial carbon materials-were selected as supports to load Fe, S, and N under high-temperature molten salt conditions to prepare ORR catalysts. The impact of support properties on catalytic activity was investigated.…”

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confidence: 99%

Effect of Carbon Support on the Properties of Fe, N, S Co-Doped ORR Catalysts Prepared by Molten Salt Method

Yang,

Wu,

Shi

et al. 2024

J. Electrochem. Soc.

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In recent years, the development of sustainable and environmentally friendly catalysts for various electrochemical processes has become a major focus in the fields of energy storage and fine chemicals. Efficient and cost-effective oxygen reduction reaction (ORR) catalysts are crucial for the advancement of fuel cells and metal-air batteries. This study explores the use of rice husk-based porous carbon (RHPC) with a hierarchically porous structure as a support material for sustainable ORR catalysts. The performance of RHPC was compared with other commercial carbon materials, such as acetylene black (AB) and coconut shell carbon (YP-50), evaluating key properties including particle size, specific surface area, oxygen-containing functional groups, degree of graphitization, and hydrophilicity/hydrophobicity. Compared to AB, which has higher conductivity, and YP-50, which has a greater abundance of oxygen functional groups, RHPC demonstrated significant advantages as a catalyst support. The resulting Fe-NS/RHPC catalyst exhibited high activity (E1/2 = 0.863 V vs. RHE, J = 5.61 mA cm-2), outperforming the standard Pt/C (E1/2 = 0.846 V vs. RHE, J = 5.47 mA cm-2). When tested in a liquid Zn-air battery, the Fe-NS/RHPC-800 catalyst achieved a peak power density of 116.2 mW cm-2 and a capacity of up to 792.5 mAh g-1.

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confidence: 99%

Effect of Carbon Support on the Properties of Fe, N, S Co-Doped ORR Catalysts Prepared by Molten Salt Method

Yang,

Wu,

Shi

et al. 2024

J. Electrochem. Soc.

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Heteroatom‐Doped Defects Anchoring Nano‐Pt for High‐Stability and Low‐Humidity Proton Exchange Membrane Fuel Cell

Zhu,

Shao,

Zhou

et al. 2024

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To meet the ever‐increasing demand of proton exchange membrane fuel cell (PEMFC), it is necessary to carry out structure optimization for low‐cost and high‐stability oxygen reduction reaction (ORR) catalysts. Herein, a zeolitic imidazolate framework (ZIF)‐derived carbon material with a mass of heteroatoms and defects is developed and serves as advanced support for nano‐Pt‐based ORR catalysts. This unique structure enhances the interaction between nano‐Pt and support, leading to higher ORR intrinsic activity. During fuel cell applications, it demonstrates impressive water‐retaining capacity and electrochemical stability. Under H2‐O2 supply without cathode humidification, this catalyst achieves high mass activity of 0.475 A mgPt−1, with only 7.4% attenuation in maximum power density after 20 000 cycles of accelerated durability test, highlighting its remarkable potential for fuel cell applications. Physicochemical characterization and theoretical simulation reveal the crucial anchoring effect of heteroatom‐doped defects to nano‐Pt, providing valuable insights for further ORR catalyst design and PEMFC applications.

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FeCu alloy dispersed N-doped carbon compound material for electrocatalytic naproxen degradation

Zhang,

Zhang

2023

J Solid State Electrochem

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Molten salt synthesis of ZIF derived CoFe alloy embedded in 2D ultrathin N-doped porous carbon nanosheets for efficient alkaline media oxygen electrocatalysis

Cited by 11 publications

References 48 publications

Effect of Carbon Support on the Properties of Fe, N, S Co-Doped ORR Catalysts Prepared by Molten Salt Method

Effect of Carbon Support on the Properties of Fe, N, S Co-Doped ORR Catalysts Prepared by Molten Salt Method

Heteroatom‐Doped Defects Anchoring Nano‐Pt for High‐Stability and Low‐Humidity Proton Exchange Membrane Fuel Cell

FeCu alloy dispersed N-doped carbon compound material for electrocatalytic naproxen degradation

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