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In?Situ XRD Study on Promotional Effect of Potassium on Carburization of Spray‐dried Precipitated Fe 22 O 33 Catalysts

机译：？原位XRD关于钾碳渗碳渗碳渗碳沉淀Fe的促进作用研究 2 2 O. 3 3 催化剂

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Abstract > A study of the promotional effect of potassium on the carburization behavior of a series of spray‐dried precipitated Fe <sub>2</sub> O <sub>3</sub> catalysts (100?Fe, 100?Fe/0.52?K, 100?Fe/1.54?K, and 100?Fe/2.4?K) has been performed by using in?situ XRD. The average crystallite size evolution for species such as α‐Fe <sub>2</sub> O <sub>3</sub> , Fe <sub>3</sub> O <sub>4</sub> , χ‐Fe <sub>5</sub> C <sub>2</sub> , and θ‐Fe <sub>3</sub> C were followed. The potassium promoter clearly inhibits the reduction of α‐Fe <sub>2</sub> O <sub>3</sub> to Fe <sub>3</sub> O <sub>4</sub> , where the decreasing binding energy in the Fe?2p <sub>3/2</sub> , O?1s and K?2p <sub>3/2</sub> spectra from X‐ray photoelectron spectroscopy (XPS) suggests an electron density increase in Fe and O upon potassium promotion, leading to the enhanced covalency in the Fe?O bond. In terms of crystallite size during carburization, an optimum potassium loading exists in catalyst 100?Fe/0.52?K, which shows the fastest reduction to Fe <sub>3</sub> O <sub>4</sub> with minimum crystallite sizes of around 7 to 15?nm. Potassium has no clear effect in determining the final crystallite size of χ‐Fe <sub>5</sub> C <sub>2</sub> . An arch‐shaped curve in the evolution of crystallite size of the Fe <sub>3</sub> O <sub>4</sub> intermediate was observed, which can be explained by the activation energy difference between the bidirectional steps of the outward oxygen diffusion and the inward carbon diffusion. </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> > 钾促进钾对一系列喷雾干燥沉淀Fe的渗碳行为的研究 <sub> 2 </ sub> O. <sub> 3 </ sub> 催化剂（100？Fe，100？Fe / 0.52 k，100？Fe / 1.54 k和100？Fe / 2.4 k）已经通过？原位XRD进行。 α-Fe等种类的平均微晶尺寸演化 <sub> 2 </ sub> O. <sub> 3 </ sub> ，Fe. <sub> 3 </ sub> O. <sub> 4 </ sub> ，χ-fe <sub> 5 </ sub> C <sub> 2 </ sub> 和θ-fe <sub> 3 </ sub> C被关注。钾启动子显然抑制了α-Fe的减少 <sub> 2 </ sub> O. <sub> 3 </ sub> FE. <sub> 3 </ sub> O. <sub> 4 </ sub> ，在FeΔ2p中降低结合能量 <sub> 3/2 </ sub> ，o？1s和k？2p <sub> 3/2 </ sub> 来自X射线光电子体光谱（XPS）的光谱表明Fe和O对钾促进时的电子密度增加，导致Feα键的增强的共价。在渗碳过程中的微晶尺寸方面，催化剂100？Fe /0.52Ω·k中存在最佳钾载量，其显示出达到最快的Fe <sub> 3 </ sub> O. <sub> 4 </ sub> 最小晶体尺寸约为7至15Ω·纳米。钾没有明显的效果来确定χ-fe的最终微晶尺寸 <sub> 5 </ sub> C <sub> 2 </ sub> 。拱形曲线在Fe的微晶尺寸的演变中 <sub> 3 </ sub> O. <sub> 4 </ sub> 观察到中间体，可以通过向外氧扩散的双向步骤与向内碳扩散之间的激活能量差来解释。 </ 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>2017年第9期</span><b style="margin: 0 2px;">|</b><span>共10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=carburization&option=203" rel="nofollow">carburization;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Fischer–Tropsch synthesis&option=203" rel="nofollow">Fischer–Tropsch synthesis;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=iron&option=203" rel="nofollow">iron;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=potassium&option=203" rel="nofollow">potassium;</a> <a style="color: #3E7FEB;" href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=X-ray diffraction&option=203" rel="nofollow">X-ray diffraction;</a> </p> <div class="translation"> 机译：渗碳;Fischer-Tropsch合成;铁;钾;X射线衍射; </div> </li> </ul> </div> </div> <div class="literature cardcommon" id="literaturereference" style="display:none"> <div class="similarity "> <h3 class="all_title" id="enpatent111">引文网络</h3> <div class="referencetab clearfix"> <ul id="referencedaohang"> <li dataid="referenceul">参考文献</li> <li dataid="citationul">引证文献</li> <li dataid="commonreferenceul">共引文献</li> <li dataid="commoncitationul">同被引文献</li> <li dataid="tworeferenceul">二级参考文献</li> <li dataid="twocitationul">二级引证文献</li> </ul> </div> <div class="reference_details" id="referenceList"> <ul id="referenceul"></ul> <ul id="citationul"></ul> <ul id="commonreferenceul"></ul> <ul id="commoncitationul"></ul> <ul id="tworeferenceul"></ul> <ul id="twocitationul"></ul> </div> </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/0704022056896.html">In?Situ XRD Study on Promotional Effect of Potassium on Carburization of Spray‐dried Precipitated Fe <sub >2</sub>2 O <sub >3</sub>3 Catalysts</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor"> </a> <a href="/journal-foreign-16041/" target="_blank" rel="nofollow" class="tuijian_authcolor">ChemCatChem .</a> <span>2017</span><span>,第9期</span> </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：？原位XRD关于钾碳渗碳渗碳渗碳沉淀Fe的促进作用研究 <sub> 2 </ sub> 2 O. <sub> 3 </ sub> 3 催化剂</span> </p> </li> <li> <div> <b>2. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704022553571.html">Effects of Zr Doping into Ceria for the Dry Reforming of Methane over Ni/CeZrO2 Catalysts: In Situ Studies with XRD, XAFS, and AP-XPS</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Zhang Feng&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Zhang Feng,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Liu Zongyuan&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Liu Zongyuan,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Chen Xiaobo&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Chen Xiaobo,</a> <a href="/journal-foreign-18795/" target="_blank" rel="nofollow" class="tuijian_authcolor">ACS catalysis .</a> <span>2020</span><span>,第5期</span> </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：Zr掺杂对Ni / Cezro2催化剂干燥重整的影响：用XRD，XAF和AP-XPS的原位研究</span> </p> </li> <li> <div> <b>3. </b><a class="enjiyixqcontent" href="/journal-foreign-detail/0704028184846.html">Effect of potassium promotion on the structure and performance of alumina supported carburized molybdenum catalysts for Fischer-Tropsch synthesis</a> <b>[J]</b> . <span> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Li Tong&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Li Tong,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Virginie Mirella&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Virginie Mirella,</a> <a href="/search.html?doctypes=4_5_6_1-0_4-0_1_2_3_7_9&sertext=Khodakov Andrei Y.&option=202" target="_blank" rel="nofollow" class="tuijian_auth tuijian_authcolor">Khodakov Andrei Y. </a> <a href="/journal-foreign-19278/" target="_blank" rel="nofollow" class="tuijian_authcolor">Applied Catalysis, A. 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