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Pt Anchored on Mn(Co)CO3/MnCo2O4 Heterostructure for Complete Oxidation of Formaldehyde at Room Temperature
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-09-10 , DOI: 10.1002/slct.202002870 Nenghuan Wang 1 , Zhihua Xu 1, 2 , Tingting Luo 3 , Zhaoxiong Yan 1 , Mei Jin 1 , Ling Shi 1
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-09-10 , DOI: 10.1002/slct.202002870 Nenghuan Wang 1 , Zhihua Xu 1, 2 , Tingting Luo 3 , Zhaoxiong Yan 1 , Mei Jin 1 , Ling Shi 1
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Mn(Co)CO3/MnCo2O4 hybrids were prepared via a hydrothermal following by heat‐treatment process and used as novel supports of Pt nanoparticles for formaldehyde (HCHO) removal at room temperature. The catalyst heat‐treated at 150 °C had a primary nanorod‐like morphology, however, its well‐defined structure was obviously collapsed when the heat‐treatment temperature was above 350 °C. In the static experiment where indoor HCHO removal was simulated at room temperature, the catalyst heat‐treated at 150 °C with only 0.4 wt % Pt showed the best catalytic activity among the investigated samples, which possessed a HCHO removal efficiency of 92.2 % in 60 min under the initial HCHO concentration at approximately 180 ppm. The unique nanorod feature and heterogeneous interface between MnCo2O4 and Mn(Co)CO3 (MnCO3 and CoCO3) with a proper weight ratio are the main contributions to the superior catalytic performance of the catalyst by boosting the charge transfer and active oxygen species formation in the process of HCHO catalytic oxidation reaction. Our work indicates that well‐defined morphological heterostructures which facilitate the charge migration and formation of reactive oxygen species, could be the potential alternative catalysts in the enhancement of HCHO decomposition at room temperature.
中文翻译：
铂固定在Mn（Co）CO3 / MnCo2O4异质结构上以在室温下完全氧化甲醛
Mn（Co）CO 3 / MnCo 2 O 4杂化物通过水热处理，随后的热处理工艺制备而成，并用作室温下去除甲醛（HCHO）的Pt纳米粒子的新型载体。在150°C热处理的催化剂具有基本的纳米棒状形态，但是，当热处理温度高于350°C时，其明确定义的结构明显塌陷。在室温下模拟室内HCHO去除的静态实验中，在150°C下仅含0.4 wt％Pt进行热处理的催化剂显示出最佳的催化活性，在60个样品中HCHO去除效率为92.2％。在大约180 ppm的初始HCHO浓度下的最小分钟数。MnCo 2 O 4和Mn（Co）CO之间独特的纳米棒特征和异质界面适当的重量比的3（MnCO 3和CoCO 3）是通过在HCHO催化氧化反应过程中促进电荷转移和活性氧种类形成而对催化剂优异的催化性能的主要贡献。我们的工作表明，定义明确的形态异质结构可促进电荷迁移和活性氧的形成，可能是在室温下增强HCHO分解的潜在替代催化剂。
更新日期：2020-09-10
中文翻译：
铂固定在Mn（Co）CO3 / MnCo2O4异质结构上以在室温下完全氧化甲醛
Mn（Co）CO 3 / MnCo 2 O 4杂化物通过水热处理，随后的热处理工艺制备而成，并用作室温下去除甲醛（HCHO）的Pt纳米粒子的新型载体。在150°C热处理的催化剂具有基本的纳米棒状形态，但是，当热处理温度高于350°C时，其明确定义的结构明显塌陷。在室温下模拟室内HCHO去除的静态实验中，在150°C下仅含0.4 wt％Pt进行热处理的催化剂显示出最佳的催化活性，在60个样品中HCHO去除效率为92.2％。在大约180 ppm的初始HCHO浓度下的最小分钟数。MnCo 2 O 4和Mn（Co）CO之间独特的纳米棒特征和异质界面适当的重量比的3（MnCO 3和CoCO 3）是通过在HCHO催化氧化反应过程中促进电荷转移和活性氧种类形成而对催化剂优异的催化性能的主要贡献。我们的工作表明，定义明确的形态异质结构可促进电荷迁移和活性氧的形成，可能是在室温下增强HCHO分解的潜在替代催化剂。
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