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负载于氧化镧（III）上的钯（0）纳米颗粒作为硼烷肼甲醇解制氢的有效催化剂。

Palladium (0) nanoparticles distributed on lanthanum (III) oxide as an effective catalyst for the methanolysis of hydrazine-borane to produce hydrogen.

作者信息

Rüzgar Adem, Şener Lokman, Karataş Yaşar, Gülcan Mehmet

机构信息

Department of Chemistry, Faculty of Science, Van Yüzüncü Yil University, Van, Turkiye.

出版信息

Turk J Chem. 2024 Jan 3;48(1):137-151. doi: 10.55730/1300-0527.3646. eCollection 2024.

DOI:10.55730/1300-0527.3646
PMID:38544891
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10965170/
Abstract

Pd (0) nanoparticles (NPs) distributed on lanthanum (III) oxide were ex situ generated from the reduction of Pd ions using NaBH as reducing agent. The Pd/LaO displayed good catalytic activity in H(g) releasing from the hydrazine-borane (HB) methanolysis reaction and it was identified by advanced techniques. Pd/LaO was found to be an active catalyst procuring three equiv. H(g) per mole of HB. The results from TEM images represent the formation of Pd (0) NPs with an average particle size of 1.94 ± 0.1 nm on the surface of LaO. Moreover, Pd/LaO with various Pd loadings were prepared and tested as catalyst in the methanolysis reaction to find the optimum metal loading on LaO support. The highest H formation rate was achieved with 3.0 wt% Pd. Pd/LaO catalyst exhibited a turnover frequency (TOF) value of 24.4 mol H mol Pd min in the reaction conditions. Additionally, the effect of different catalyst concentrations and temperatures on the reaction kinetics for the methanolysis of HB catalyzed by Pd/LaO.

摘要

使用硼氢化钠（NaBH）作为还原剂，通过钯离子还原反应在氧化镧（III）上原位生成钯（0）纳米颗粒（NPs）。钯/氧化镧在硼氢化肼（HB）甲醇解反应释放氢气（H₂(g)）的过程中表现出良好的催化活性，并通过先进技术得以鉴定。发现钯/氧化镧是一种活性催化剂，每摩尔硼氢化肼可产生三当量的氢气（H₂(g)）。透射电子显微镜（TEM）图像结果表明，在氧化镧表面形成了平均粒径为1.94±0.1纳米的钯（0）纳米颗粒。此外，制备了不同钯负载量的钯/氧化镧，并在甲醇解反应中作为催化剂进行测试，以确定氧化镧载体上的最佳金属负载量。钯负载量为3.0 wt%时，氢气生成速率最高。在反应条件下，钯/氧化镧催化剂的周转频率（TOF）值为24.4 mol H₂ mol⁻¹ Pd⁻¹ min⁻¹。此外，还研究了不同催化剂浓度和温度对钯/氧化镧催化硼氢化肼甲醇解反应动力学的影响。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ce68/10965170/4ea95e8a3f93/tjc-48-01-0137f9.jpg
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