Raney Ni as a high-performance catalyst for the hydrolysis of ammonia borane to produce hydrogen

Q3 Energy

燃料化学学报 Pub Date : 2025-04-01 DOI:10.1016/S1872-5813(24)60492-5

Tianxuan YANG, Meixia WU, Junli WANG, Ning CHEN, Changqiang TANG, Jiang LI, Jianpeng SHANG, Yong GUO, Zuopeng LI

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引用次数: 0

Abstract

Ammonia borane (AB) has received much attention as an environmentally friendly, non-toxic, room temperature stable hydrogen storage material with high hydrogen content of 19.6%. However, its hydrolysis for hydrogen production at room-temperature is kinetically slow and requires precious metal catalysts. In this work, it is found that the prepared Raney Ni W-r treated with high concentration of NaOH (6.25 mol/L) at 110 °C exhibited excellent catalytic performance for AB hydrolysis at room temperature. The Raney Ni W-r can promote the AB complete hydrolysis within 60 s under basic condition at small sized trials, even higher than that of the 20% Pt/C catalyst. Its apparent activation energy at room temperature is only 26.6 kJ/mol and the turnover frequency (TOF) value is as high as 51.42 min⁻¹. Owing to its high density and magnetic properties, the catalyst is very easy for magnetic separation. Furthermore, possible mechanism of the hydrolytic reaction of AB based on experimental results is proposed. As a well-established industrial catalyst, Raney Ni has been prepared on a large scale at low cost. This study provides a promising pathway for the large-scale preparation of low-cost and recyclable catalysts for AB hydrolysis.

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Raney Ni作为高效催化剂水解氨硼烷生成氢气

氨硼烷（AB）作为一种氢含量高达19.6%的环保、无毒、室温稳定的储氢材料受到了广泛关注。然而，它在室温下水解制氢的动力学速度很慢，需要贵金属催化剂。本研究发现，制备的Raney Ni W-r经高浓度NaOH （6.25 mol/L）在110℃下处理后，在室温下具有优异的AB水解催化性能。在小型试验中，Raney Ni W-r在碱性条件下可促进AB在60 s内完全水解，甚至高于20% Pt/C催化剂。其室温表观活化能仅为26.6 kJ/mol， TOF值高达51.42 min−1。该催化剂具有较高的密度和磁性，很容易进行磁选。根据实验结果，提出了AB水解反应的可能机理。Raney Ni作为一种成熟的工业催化剂，已经实现了低成本、大规模的制备。本研究为大规模制备低成本、可回收的AB水解催化剂提供了一条有前景的途径。

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来源期刊

燃料化学学报 Chemical Engineering-Chemical Engineering (all)

CiteScore

2.80

自引率

0.00%

发文量

5825

期刊介绍： Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.