Thin film electrodes from Pt nanorods supported on aligned N-CNTs for proton exchange membrane fuel cells

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2020-01-01 DOI:10.1016/j.apcatb.2019.118031

Peter Mardle , Xiaochao Ji , Jing Wu , Shaoliang Guan , Hanshan Dong , Shangfeng Du

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引用次数: 61

Abstract

The enhanced performance of carbon nanotubes (CNTs) over carbon black as a catalyst support and the outstanding catalytic activities of one-dimensional (1D) Pt nanostructures endow them big potential for applications in fuel cells. However, the research has been mainly focused on the materials, and a combination of both 1D Pt nanostructures and CNTs to fabricate practical high power performance fuel cell electrodes still remains a challenge. In this work, we demonstrate catalyst electrodes from Pt nanorods grown on aligned nitrogen doped CNTs for proton exchange membrane fuel cell (PEMFC) applications. Short Pt nanorods are grown on CNTs deposited directly on 16 cm² carbon paper gas diffusion layers (GDLs) via plasma enhanced chemical vapour deposition (PECVD) and nitrided using active screen plasma (ASP) treatment, which are directly employed as cathodes for H₂/air PEMFCs. The thin open catalyst layer effectively enhances mass transfer performance and, with a less than half of the Pt loading, 1.23 fold power density is achieved as compared with that from commercial Pt/C catalysts. A better durability is also confirmed which can be attributed to the good structure stability of nanorods and the enhancement effects from the N-CNT support.

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质子交换膜燃料电池用排列在N-CNTs上的Pt纳米棒薄膜电极

碳纳米管(CNTs)作为催化剂载体的性能优于炭黑，而一维铂纳米结构具有优异的催化活性，使其在燃料电池中的应用具有很大的潜力。然而，目前的研究主要集中在材料上，将一维铂纳米结构和碳纳米管结合起来制造实用的高性能燃料电池电极仍然是一个挑战。在这项工作中，我们展示了在氮掺杂碳纳米管上生长的Pt纳米棒催化剂电极用于质子交换膜燃料电池(PEMFC)的应用。通过等离子体增强化学气相沉积(PECVD)在16 cm2的碳纸气体扩散层(gdl)上直接沉积了短Pt纳米棒，并通过活性屏等离子体(ASP)处理进行氮化处理，直接用作H2/空气pemfc的阴极。薄的开孔催化剂层有效地提高了传质性能，并且在Pt负载不到一半的情况下，实现了比商用Pt/C催化剂高1.23倍的功率密度。纳米棒具有较好的耐久性，这可归因于纳米棒良好的结构稳定性和n -碳纳米管支架的增强效应。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.