了解银掺杂对CeCoOy混合氧化物催化剂上甲醇催化氧化的影响

IF 3.1 3区化学 Q3 CHEMISTRY, PHYSICAL

Chemical Physics Letters Pub Date : 2025-10-07 DOI:10.1016/j.cplett.2025.142466

Junhao Jing, Zhitao Han, Sihan Yin, Liangzheng Lin, Tingjun Liu, Chuanqiu Gao, You Tian

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引用次数: 0

摘要

采用溶胶-凝胶法制备了掺银Ce1-xAgxCoOy混合氧化物催化剂，并将其应用于甲醇催化氧化。Ag掺杂诱导Co2+氧化为Co3+，减弱CoO键，从而产生额外的吸附位点，增强表面活性氧，同时降低还原峰温度。Ce0.8Ag0.2CoOy催化剂在110℃下的甲醇转化率达到99.6%，主要是由于其丰富的表面氧种类和增强的低温氧化还原能力，迅速补充了甲醇氧化过程中消耗的表面晶格氧，从而促进了高效的氧化还原循环。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Understanding the effect of Ag doping on methanol catalytic oxidation over CeCoOy mixed oxide catalysts

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Understanding the effect of Ag doping on methanol catalytic oxidation over CeCoOy mixed oxide catalysts

Ag-doped Ce_1-xAg_xCoO_y mixed oxide catalysts were synthesized via the sol-gel method and applied to methanol catalytic oxidation. Ag doping induced the oxidation of Co²⁺ to Co³⁺ and weakened CoO bonds, thereby creating additional adsorption sites and enhancing surface-active oxygen species while lowering the reduction peak temperature. Ce_0.8Ag_0.2CoO_y catalyst achieved 99.6 % methanol conversion at 110 °C, mainly due to its abundant surface oxygen species and enhanced low-temperature redox capacity, which rapidly replenished the surface lattice oxygen consumed during methanol oxidation, thus facilitating efficient redox cycling.

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来源期刊

Chemical Physics Letters 化学-物理：原子、分子和化学物理

CiteScore

5.70

自引率

3.60%

发文量

798

审稿时长

33 days

期刊介绍： Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage. Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.