Investigation of the influence of amino trimethylene phosphonic acid on oxygen reduction reaction on platinum catalyst

IF 13.3 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2024-11-30 DOI:10.1016/j.cej.2024.158164

Wenteng Wu, Qingxin Wang, Wen Li, Wen Liu, Di Wang, Jiashuo Fu, Jin Zhang, Yunqi Li, Haining Wang, Shanfu Lu, Yan Xiang

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Abstract

Recently, organic phosphonic acids (OPAs)/PA were developed as an excellent dual-proton conductor in high-temperature polymer electrolyte membrane fuel cells to solve the leaching of PA. However, the effect of OPAs on the catalytic property of Pt is still unclear. In this work, we investigate the influence of amino trimethylene phosphonic acid (ATMP) on oxygen reduction reaction (ORR) on Pt catalyst through a combined experimental and simulation study. It is found ATMP caused a 15 mV negative shift in half-wave potential which is only half of PA and a 60 % increase in mass activity compared to PA, indicating its weaker poisoning effect. The reason is that the N-containing structures of ATMP molecules could benefit the catalytic property of Pt for its regulation to the electronic structure of Pt. Meanwhile, Pt shows higher durability in ATMP than PA due to the weaker adsorption of ATMP on Pt surface. Therefore, the role of ATMP should be utilized for designing ORR catalyst in high-temperature polymer electrolyte membrane fuel cells.

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氨基三亚甲基膦酸对铂催化剂上氧还原反应影响的研究

近年来，有机膦酸(OPAs)/PA作为一种优异的双质子导体被开发用于高温聚合物电解质膜燃料电池，以解决PA的浸出问题。然而，OPAs对Pt催化性能的影响尚不清楚。本文通过实验和模拟相结合的方法，研究了氨基三亚甲基膦酸（ATMP）对Pt催化剂上氧还原反应（ORR）的影响。发现ATMP引起的半波电位负移15 mV，仅为PA的一半，质量活性比PA增加60 %，表明其中毒作用较弱。这是因为ATMP分子的含n结构有利于Pt对Pt电子结构的调节，有利于Pt的催化性能。同时，由于ATMP在Pt表面的吸附较弱，Pt在ATMP中的耐久性高于PA。因此，在设计高温聚合物电解质膜燃料电池的ORR催化剂时，应充分利用ATMP的作用。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.