How do Core–Shell Structure Features Impact on the Activity/Stability of the Co‐based Catalyst in Dry Reforming of Methane?

摘要

Abstract > Dry reforming of methane has been systematically investigated over a series of x ‐Co@SiO <sub>2</sub> ‐ y catalysts where x is the Co particle size ranging from 11.1 to 121.3?nm while y denotes the silica shell thickness ranging from 6.0 to 21.9?nm. Various techniques including TEM, XRD, H <sub>2</sub> ‐TPR/‐TPD, XPS, BET, O <sub>2</sub> ‐TPO, TG, and H <sub>2</sub> ‐TPSR‐MS were employed to characterize physicochemical properties of catalysts. H <sub>2</sub> ‐TPR and XPS results indicate that the core–shell interaction is dependent on the core size: the smaller the Co particle size is; the stronger the core–shell interaction. The investigations employing H <sub>2</sub> ‐TRSR‐MS and XPS on the spent catalysts demonstrated that a fraction of metallic Co was re‐oxidized on a large‐core catalyst such as 121.3‐Co@SiO <sub>2</sub> ‐72.2 during the reaction, and such oxidation leads to lower catalytic activity and stability. O <sub>2</sub> ‐TPO results indicated that the catalyst with smaller core size caused significant coking. TG analysis together with TEM investigation on the used samples suggested that carbon deposition is notably core‐size‐dependent and responsible for deactivation of the small‐core catalyst. Among various core–shell structured catalysts, 27.8‐Co@SiO <sub>2</sub> ‐14.3 showed superior activity and durability, owing to the well‐balanced property between coking and anti‐oxidation of Co cores. </abstract> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> <div class="translation abstracttxt"> <span class="zhankaihshouqi fivelineshidden" id="abstract"> <span>机译：</span><Abstract Type =“Main”XML：Lang =“en”> <标题类型=“main”>抽象</ title> > 已经系统地研究了甲烷的干燥重整 x </ i> -co @ sio. <sub> 2 </ sub> - Y </ I> 催化剂在哪里 x </ i> CO粒度从11.1到121.3？nm之间的范围 Y </ I> 表示二氧化硅壳厚度，范围为6.0至21.9Ω。各种技术，包括TEM，XRD，H <sub> 2 </ sub> -tpr / -tpd，xps，bet，o <sub> 2 </ sub> -tpo，tg和h <sub> 2 </ sub> -TPSR-MS用于表征催化剂的物理化学性质。 H <sub> 2 </ sub> -TPR和XPS结果表明核心壳相互作用取决于核心尺寸：CO粒径越小;核心壳相互作用越强。雇用H的调查 <sub> 2 </ sub> -TRSR-MS和废催化剂上的XPS表明，在大核催化剂如121.3-CO@sio上重新氧化了一部分金属Co. <sub> 2 </ sub> -72.2在反应过程中，这种氧化导致催化活性和稳定性降低。 O. <sub> 2 </ sub> -TPO结果表明，具有较小芯尺寸的催化剂引起了显着的焦化。 TG分析与用于使用的样品的TEM调查表明，碳沉积显着依赖性，依赖性依赖性，并负责去活化的小核催化剂。在各种核心壳结构催化剂中，27.8-CO@sio <sub> 2 </ sub> -14.3显示出卓越的活动和耐用性，由于焦化与CO核心的抗氧化之间的平衡性能。 </ p> </摘要> </span> <span class="z_kbtn z_kbtnclass hoverxs" style="display: none;">展开▼</span> </div> </div> <div class="record"> <h2 class="all_title" id="enpatent33" > 著录项</h2> <ul> <li> <span class="lefttit">来源</span> <div style="width: 86%;vertical-align: text-top;display: inline-block;"> <a href='/journal-foreign-16041/'>《ChemCatChem 》</a> <b style="margin: 0 2px;">|</b><span>2018年第13期</span><b style="margin: 0 2px;">|</b> <span>共13页</span> </div> </li> <li> <div class="author"> <span class="lefttit">作者</span> <p id="fAuthorthree" class="threelineshidden zhankaihshouqi"> </p> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zkzz" style="display: none;">展开▼</span> </div> </li> <li> <div style="display: flex;"> <span class="lefttit">作者单位</span> <div style="position: relative;margin-left: 3px;max-width: 639px;"> <div class="threelineshidden zhankaihshouqi" id="fOrgthree"> </div> <span class="z_kbtnclass z_kbtnclassall hoverxs" id="zhdw" style="display: none;">展开▼</span> </div> </div> </li> <li> <span class="lefttit">收录信息</span> <span style="width: 86%;vertical-align: text-top;display: inline-block;"></span> </li> <li> <span class="lefttit">原文格式</span> <span>PDF</span> </li> <li> <span class="lefttit">正文语种</span> <span>eng</span> </li> <li> <span class="lefttit">中图分类</span> <span> <a href="https://www.zhangqiaokeyan.com/clc/1186.html" title="物理化学（理论化学）、化学物理学">物理化学（理论化学）、化学物理学 ;</a></span> </li> <li class="antistop"> <span class="lefttit">关键词</span> <p style="width: 86%;vertical-align: text-top;"> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=cobalt&option=203" rel="nofollow">cobalt;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=core–shell structure&option=203" rel="nofollow">core–shell structure;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=nanocatalyst&option=203" rel="nofollow">nanocatalyst;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=nanomaterials&option=203" rel="nofollow">nanomaterials;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=silicon dioxide&option=203" rel="nofollow">silicon dioxide;</a> </p> <div class="translation"> 机译：钴;核心壳结构;纳米催化剂;纳米材料;二氧化硅; </div> </li> </ul> </div> </div> <div class="literature cardcommon"> <div class="similarity "> <h3 class="all_title" id="enpatent66">相似文献</h3> <div class="similaritytab clearfix"> <ul> <li class="active" >外文文献</li> <li >中文文献</li> <li >专利</li> </ul> </div> <div class="similarity_details"> <ul > <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704022060122.html">How do Core–Shell Structure Features Impact on the Activity/Stability of the Co‐based Catalyst in Dry Reforming of Methane?</a> 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<span> . 2009</span><span> ,第010期</span> </span> </div> </li> <li> <div> <b>5. </b><a class="enjiyixqcontent" href="/academic-journal-cn_detail_thesis/0201298618881.html">单晶边缘负载纳米催化剂技术--设计高稳定性甲烷干重整催化剂的新策略</a> <b>[J]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=王熙庭&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 王熙庭</a> <span> <a href="/journal-cn-58012/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 天然气化工：C1化学与化工 </a> </span> <span> . 2020</span><span> ,第2期</span> </span> </div> </li> <li> <div> <b>6. </b><a class="enjiyixqcontent" href="/academic-conference-cn_meeting-28852_thesis/020222084198.html">负载型NiO/六铝酸盐催化剂载体中镍离子的存在对催化剂的结构及甲烷二氧化碳重整反应性能的影响</a> <b>[C]</b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=刘延&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 刘延</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=程铁欣&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,程铁欣</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=李文兴&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">,李文兴</a> <span> <a href="/conference-cn-28852/" target="_blank" rel="nofollow" class="tuijian_authcolor"> . 第三届全国环境催化学术会议 </a> <span> <span> . 2003</span> </span> </div> </li> <li> <div> <b>7. </b><a class="enjiyixqcontent" href="/academic-degree-domestic_mphd_thesis/020315880486.html">高稳定性Ni/CeO2--Al2O3甲烷干重整催化剂的合成及其性能研究</a> <b>[A] </b> <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=卢晶军&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> . 卢晶军</a> <span> . 2020</span> </span> </div> </li> </ul> <ul style="display: none;"> <li> <div> <b>1. </b><a class="enjiyixqcontent" href="/patent-detail/061204576710.html">甲烷干重整反应、用于甲烷干重整反应的含镍和铈的核壳结构的催化剂及其制备</a> <b>[P]</b> . <span> 中国专利： CN107921427B </span> <span> . 2021.08.03</span> </div> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/patent-detail/06120110428497.html">甲烷干重整反应、用于甲烷干重整反应的含镍和铈的核壳结构的催化剂及其制备</a> <b>[P]</b> . <span> 中国专利： CN107921427A </span> <span> . 2018-04-17</span> </div> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/patent-detail/06130407983761.html">DRY REFORMATION OF METHANE REACTION, NICKEL AND CERIUM CONTAINING CORE-SHELL STRUCTURED CATALYSTS THEREFOR AND THEIR PREPARATION</a> <b>[P]</b> . <span> 外国专利：  EP3317015A1 </span> <span> . 2018-05-09</span> </div> <p class="zwjiyix translation" style="max-width: initial;height: auto;word-break: break-all;white-space: initial;text-overflow: initial;overflow: initial;"> <span>机译：甲烷反应，含镍和铈的核壳结构催化剂的干法转化及其制备 </span> </p> </li> <li> <div> <b>4. </b><a class="enjiyixqcontent" href="/patent-detail/06130409040845.html">DRY REFORMATION OF METHANE REACTION, NICKEL AND CERIUM CONTAINING CORE-SHELL STRUCTURED CATALYSTS THEREFOR AND THEIR PREPARATION</a> <b>[P]</b> . 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