Effect of SBA-15 Morphology in the Catalytic Performance of Pt/Ce-SBA-15 Catalyst for NOx Reduction

IF 2.1 4区化学 Q3 CHEMISTRY, PHYSICAL

Catalysis Surveys from Asia Pub Date : 2024-10-14 DOI:10.1007/s10563-024-09438-x

Shyam Sunder Rao, Anjali Bharti, Vivek Kumar Patel, Sweta Sharma

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引用次数: 0

Abstract

This research used hydrothermal technique to synthesize three different morphologies of SBA-15 supports, such as rod, hexagonal prism, and spherical. Afterward, it impregnated Pt/Ce metal on the SBA-15 supports via wet-impregnation methods and investigated their NO reduction activity using the H₂-SCR technique in the temperature range of 50–450℃. The catalysts were characterized by Brunauer-Emmett-Teller (BET), X-Ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Scanning electron microscopy, energy dispersive X-ray spectroscopy (SEM-EDS), Transmission electron microscopy (TEM), and Raman spectroscopy. Among the catalysts, Pt/Ce-SBA-15-rod exhibited the best performance with NO conversion of 52.23% and N₂ selectivity of more than 83.25% at 150℃. The Pt/Ce-SBA-15-rod catalysts’ activation energy (21.188 kJ-mol^− 1) was the lowest of all the catalysts. The catalysts with the highest NO conversion have the highest BET properties, surface oxygen (30.33%), Ce³⁺ (40.23%), Pt (0) (70.45%), and oxygen storage capacity.

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SBA-15形态对Pt/Ce-SBA-15催化剂NOx还原性能的影响

本研究利用水热技术合成了棒状、六角形和球形三种不同形态的SBA-15载体。随后，采用湿浸渍法将Pt/Ce金属浸渍在SBA-15载体上，并在50 ~ 450℃的温度范围内采用H2-SCR技术研究了其NO还原活性。采用brunauer - emmet - teller （BET）、x射线衍射（XRD）、x射线光电子能谱（XPS）、扫描电镜、x射线能谱（SEM-EDS）、透射电镜（TEM）和拉曼光谱对催化剂进行了表征。其中，Pt/Ce-SBA-15-rod在150℃下的NO转化率为52.23%，N2选择性大于83.25%，表现出最佳的催化性能。Pt/ ce - sba -15棒催化剂的活化能最低，为21.188 kJ-mol−1。NO转化率最高的催化剂具有最高的BET性能、表面氧（30.33%）、Ce3+(40.23%)、Pt（70.45%）和储氧能力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Catalysis Surveys from Asia 化学-物理化学

CiteScore

4.80

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： Early dissemination of important findings from Asia which may lead to new concepts in catalyst design is the main aim of this journal. Rapid, invited, short reviews and perspectives from academia and industry will constitute the major part of Catalysis Surveys from Asia . Surveys of recent progress and activities in catalytic science and technology and related areas in Asia will be covered regularly as well. We would appreciate critical comments from colleagues throughout the world about articles in Catalysis Surveys from Asia . If requested and thought appropriate, the comments will be included in the journal. We will be very happy if this journal stimulates global communication between scientists and engineers in the world of catalysis.