时间标签：数据日期 2026-10-31 · 生成时间 2026-11-01 05:30（Asia/Shanghai）｜ 检索窗口 PubMed edat 2026/10/28–2026/10/31 ｜ 情报发生日期 2026-10-31
研究问题
However, the detection in these approaches is typically limited to mass spectrometry or thermal conductivity detectors for monitoring probe uptake and reaction at the reactor outlet.；The results suggested that increasing the Pd loading increased the absolute number of active sites; however, the relative site density normalized by total Pd atoms, i.e., the dispersion, decreased.
方法
CO probe molecules were first introduced to saturate the active sites on Pd/Al2O3 catalysts, followed by the introduction of oxygen gas as the titrant to oxidize the preadsorbed CO.
核心结论
This conclusion was further supported by (1) a control experiment conducted on pure Al2O3, in which no significant temperature change was found in either the IR thermal images or the thermal curve throughout the entire process (c, black line); (2) a very good consistency was observed among the results obtained from repeatable measurements (), and (3) in contrast to the pronounced temperature rise observed during the titration of preadsorbed CO with O2, no noticeable temperature change was detected during the preadsorption of CO probes on the active sites of the catalyst.；Owing to the fast kinetics of the exothermic CO oxidation reaction, the catalyst temperature rapidly increased within a few seconds (from t 1 to t 2, as shown in the rescaled inset of c).；First, Q m increased with the amount of adsorbed CO probes. ‖ 结论：This behavior may be attributed to the increased likelihood of sintering in catalysts with higher Pd loadings, where Pd particles are positioned closer together, thereby promoting particle coalescence under high-temperature conditions.
局限
However, these differences were much smaller than those between samples with different Pd loadings and likely originated from slight sample heterogeneity, which was further validated by screening catalysts with the same Pd loading in a single experiment ().；Although accurately extracting absolute heat release remains challenging due to complex heat-transfer characteristics, this limitation can be effectively mitigated through appropriate calibration.
对本项目的价值
★☆☆☆☆ 相关范围内，作为背景与横向对照收录。
全文来源
PMC JATS 全文（正文 22,178 字符，已过标题/DOI 逐字归属校验）
原文题录
- 英文标题：High-Throughput Calorimetric Titration of Active Sites on Metal Oxide-Supported Catalysts with Infrared Thermal Imaging.
- 期刊与标识：Chem Biomed Imaging · PMID 42953309 · DOI 10.1021/cbmi.6c00059
B 级证据分级：B 级（同行评议临床前研究，主要为动物模型）
本文核心结论来自动物模型或体外细胞学，属临床前证据，不能外推至人体。「延长健康寿命」「改善功能」等表述在小鼠中的意义，与人类临床结局之间仍有距离。
关于本文的文献来源：本站依据 IMA 知识库「五刊监控·深度文献卡片」撰写，依据已获取的期刊全文（方法、样本量与结论已回到原文核对）；未能获取全文的同批条目另行标注「摘要级」，全程未做任何数值推算补全。