Improvement of Catalytic Methane Oxidation by Nitric Acid Treatment on Pt/TiO2

IF 5.7 Q2 ENERGY & FUELS

Advanced Energy and Sustainability Research Pub Date : 2025-01-02 DOI:10.1002/aesr.202400358

Jiseok Park, Wo Bin Bae, Sang Woo Byun, Hyeonwoo Shin, Haehyun Min, Young Jin Kim, Sung Bong Kang

{"title":"Improvement of Catalytic Methane Oxidation by Nitric Acid Treatment on Pt/TiO2","authors":"Jiseok Park, Wo Bin Bae, Sang Woo Byun, Hyeonwoo Shin, Haehyun Min, Young Jin Kim, Sung Bong Kang","doi":"10.1002/aesr.202400358","DOIUrl":null,"url":null,"abstract":"This study investigates the effect of nitric acid (Pt:NA) treatment on the catalytic performance of Pt/TiO2 catalysts in methane oxidation. By varying the molar ratio of Pt to nitric acid (NA) from 1:0.1 to 1:10 of Pt:NA, a series of Pt/NA-TiO2 catalysts are synthesized. The structural and catalytic properties are identified using X-Ray photoelectron spectroscopy, transmission electron microscopy, and diffuse reflectance infrared Fourier transform spectroscopy. The NA treatment during the catalyst synthesis promotes the formation of acidic sites, enhancing the uniform adsorption of the Pt precursor, which in turn improves Pt dispersion and catalytic activity. However, excessive NA treatment above Pt:NA ratio of 1:5 induces the formation of larger Pt particles due to competitive nitrate adsorption, leading to decreased Pt dispersion and diminished catalytic performance. These findings provide a simple method for synthesizing active Pt supported on TiO2 catalysts with NA treatment having well-dispersed Pt particles, thereby maximizing the catalytic activity of the methane oxidation.","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"6 7","pages":""},"PeriodicalIF":5.7000,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202400358","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy and Sustainability Research","FirstCategoryId":"1085","ListUrlMain":"https://advanced.onlinelibrary.wiley.com/doi/10.1002/aesr.202400358","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENERGY & FUELS","Score":null,"Total":0}

引用次数: 0

Abstract

This study investigates the effect of nitric acid (Pt:NA) treatment on the catalytic performance of Pt/TiO₂ catalysts in methane oxidation. By varying the molar ratio of Pt to nitric acid (NA) from 1:0.1 to 1:10 of Pt:NA, a series of Pt/NA-TiO₂ catalysts are synthesized. The structural and catalytic properties are identified using X-Ray photoelectron spectroscopy, transmission electron microscopy, and diffuse reflectance infrared Fourier transform spectroscopy. The NA treatment during the catalyst synthesis promotes the formation of acidic sites, enhancing the uniform adsorption of the Pt precursor, which in turn improves Pt dispersion and catalytic activity. However, excessive NA treatment above Pt:NA ratio of 1:5 induces the formation of larger Pt particles due to competitive nitrate adsorption, leading to decreased Pt dispersion and diminished catalytic performance. These findings provide a simple method for synthesizing active Pt supported on TiO₂ catalysts with NA treatment having well-dispersed Pt particles, thereby maximizing the catalytic activity of the methane oxidation.

Abstract Image

查看原文本刊更多论文

硝酸处理Pt/TiO2催化甲烷氧化性能的改进

研究了硝酸（Pt:NA）处理对Pt/TiO2催化剂甲烷氧化性能的影响。通过改变Pt与硝酸（NA）的摩尔比（Pt:NA）从1:0.1到1:10)，合成了一系列Pt/NA- tio2催化剂。利用x射线光电子能谱、透射电子显微镜和漫反射红外傅立叶变换能谱对其结构和催化性能进行了鉴定。催化剂合成过程中NA的处理促进了酸性位点的形成，增强了Pt前驱体的均匀吸附，从而提高了Pt的分散性和催化活性。然而，在Pt:NA比超过1:5的情况下，过量的NA处理会由于硝酸盐的竞争性吸附而形成更大的Pt颗粒，导致Pt分散性下降，催化性能下降。这些发现提供了一种简单的方法，在具有良好分散Pt颗粒的NA处理TiO2催化剂上合成活性Pt，从而最大限度地提高甲烷氧化的催化活性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Advanced Energy and Sustainability Research

CiteScore

8.20

自引率

3.40%

发文量

期刊介绍： Advanced Energy and Sustainability Research is an open access academic journal that focuses on publishing high-quality peer-reviewed research articles in the areas of energy harvesting, conversion, storage, distribution, applications, ecology, climate change, water and environmental sciences, and related societal impacts. The journal provides readers with free access to influential scientific research that has undergone rigorous peer review, a common feature of all journals in the Advanced series. In addition to original research articles, the journal publishes opinion, editorial and review articles designed to meet the needs of a broad readership interested in energy and sustainability science and related fields. In addition, Advanced Energy and Sustainability Research is indexed in several abstracting and indexing services, including： CAS: Chemical Abstracts Service (ACS) Directory of Open Access Journals (DOAJ) Emerging Sources Citation Index (Clarivate Analytics) INSPEC (IET) Web of Science (Clarivate Analytics).