A Ni-MoOx composite catalyst for the hydrogen oxidation reaction in anion exchange membrane fuel cell

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL Applied Catalysis B: Environmental Pub Date : 2023-09-05 DOI:10.1016/j.apcatb.2023.122740

YongKeun Kwon , Doosun Hong , Jue-Hyuk Jang , MinJoong Kim , SeKwon Oh , DongHoon Song , JeongHoon Lim , Sung Jong Yoo , EunAe Cho

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引用次数: 3

Abstract

In developing anion exchange membrane fuel cells (AEMFCs), the sluggish hydrogen oxidation reaction (HOR) under alkaline condition is one of the major challenges to be overcome. A screening process using the simple electrodeposition method suggests Ni-29Mo as the most promising composition among the prepared Ni-M (M= Co, Fe, Zn, Cr, Mo, W) and Ni-xMo (x = 22∼33 at%) samples. Experimental analyses and theoretical computations demonstrate that the Ni-29Mo is composed of metallic nickel and molybdenum oxide (Ni-MoO_x) domains and the hydrogen adsorption energy on metallic Ni is tailored in the presence of MoO₂ towards the optimal value. The Ni-MoO_x composite catalyst shows a superior HOR activity (1.12 mA/cm² @ 20 mV_RHE), outperforming carbon supported platinum (Pt/C, 1.01 mA/cm² @ 20 mV_RHE), the best HOR catalyst. An AEMFC fabricated using Ni-29Mo nanoparticles as an anode catalyst exhibits excellent performance, approximately half of the Pt/C counterpart cell, demonstrating practical applicability of the catalyst.

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阴离子交换膜燃料电池中氢氧化反应的Ni-MoOx复合催化剂

在阴离子交换膜燃料电池(aemfc)的发展中，碱性条件下缓慢的氢氧化反应(HOR)是需要克服的主要挑战之一。采用简单电沉积法筛选过程表明，在制备的Ni-M (M= Co, Fe, Zn, Cr, Mo, W)和Ni-xMo (x = 22 ~ 33 at%)样品中，Ni-29Mo是最有希望的成分。实验分析和理论计算表明，Ni- 29mo由金属镍和氧化钼(Ni- moox)畴组成，在MoO2存在下，金属Ni对氢的吸附能被调整到最优值。Ni-MoOx复合催化剂具有较好的HOR活性(1.12 mA/cm2 @ 20 mVRHE)，优于最佳HOR催化剂碳负载铂(Pt/C, 1.01 mA/cm2 @ 20 mVRHE)。使用Ni-29Mo纳米颗粒作为阳极催化剂制备的AEMFC表现出优异的性能，约为Pt/C对应物电池的一半，证明了该催化剂的实用性。

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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.