Supported bimetallic Pt-Pd/ZrVFeTi catalyst for H2 oxidation and its enhanced catalytic hydrogen elimination performance

IF 8.9 2区工程技术 Q1 ENERGY & FUELS

Journal of energy storage Pub Date : 2024-11-27 DOI:10.1016/j.est.2024.114731

Yong Liu , He Zhang , Aimin Ju , Ping Li , Xuanhui Qu

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Abstract

The deflagration of hydrogen in confined spaces is a significant safety concern. To eliminate hydrogen for ensuring safety, we study catalysts for catalytic oxidation of hydrogen at room temperature. Bimetallic PtPd catalyst is prepared on the hydrogen storage alloy ZrVFeTi by the chemical reduction method. The structure, composition, morphology and elemental analyses are characterized using XRD, HR-TEM, XPS and ICP-AES, and its hydrogen elimination performance is also studied. The obtained results show that Pt-Pd/ZrVFeTi bimetallic catalyst displays superior catalytic performance toward H₂ oxidation reaction than monometallic Pt/ZrVFeTi or Pd/ZrVFeTi catalyst, which can be attributed to the presence of the PtPd alloyed structures. The Pt-Pd/ZrVFeTi bimetallic catalyst exhibits a high hydrogen conversion of 98.8 % when the hydrogen inlet concentration is 4 vol%, which is higher than 94.3 % for Pd/ZrVFeTi and 91.3 % for Pt/ZrVFeTi. Furthermore, it maintains excellent catalytic activity over 120 mins of the testing experiments, demonstrating remarkable stability. The synergistic effect between Pt and Pd proves beneficial for H₂ oxidation reaction.

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用于 H2 氧化的负载型双金属 Pt-Pd/ZrVFeTi 催化剂及其增强的催化消氢性能

氢气在密闭空间的爆燃是一个重大的安全问题。为了消除氢气以确保安全，我们研究了室温下催化氧化氢气的催化剂。我们采用化学还原法在储氢合金 ZrVFeTi 上制备了双金属 PtPd 催化剂。利用 XRD、HR-TEM、XPS 和 ICP-AES 对催化剂的结构、组成、形貌和元素分析进行了表征，并对其氢消除性能进行了研究。结果表明，与单金属 Pt/ZrVFeTi 或 Pd/ZrVFeTi 催化剂相比，Pt-Pd/ZrVFeTi 双金属催化剂对 H2 氧化反应具有更优越的催化性能。当氢气入口浓度为 4 vol% 时，Pt-Pd/ZrVFeTi 双金属催化剂的氢气转化率高达 98.8%，高于 Pd/ZrVFeTi 的 94.3% 和 Pt/ZrVFeTi 的 91.3%。此外，它还能在 120 分钟的测试实验中保持良好的催化活性，显示出显著的稳定性。事实证明，铂和钯之间的协同效应有利于 H2 氧化反应。

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来源期刊

Journal of energy storage Energy-Renewable Energy, Sustainability and the Environment

CiteScore

11.80

自引率

24.50%

发文量

2262

审稿时长

69 days

期刊介绍： Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.