Fabrication of Pd/CeO2 nanocubes as highly efficient catalysts for degradation of formaldehyde at room temperature

Chen Yafeng; Jiang Guimin; Cui XiangzhiZhang ZuotaiHou Xinmei

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Fabrication of Pd/CeO2 nanocubes as highly efficient catalysts for degradation of formaldehyde at room temperature

机译：制造Pd / CeO2 nanocubes高度高效催化剂的降解甲醛在室温下

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Eliminating indoor formaldehyde (HCHO) pollution at room temperature is highly needed to improve the environment while saving energy. Herein, Pd/CeO2 catalysts with different morphologies of the CeO2 support were employed to investigate their performance for HCHO oxidation. The Pd/CeO2 nanocube (Pd/CeO2-C) catalyst exhibited excellent catalytic activity compared to commercial CeO2 and CeO2 nanorods. HCHO can be completely converted into CO2 and H2O over the Pd/CeO2-C (0.64 wt% Pd) catalyst at a weight hourly space velocity of 36 000 mL g(-1) h(-1) at room temperature. Multiple characterization results confirmed that the strong interfacial interaction between Pd and the CeO2-C support guarantees a high percentage of metallic Pd on the CeO2-C surface and its high dispersion, which is crucial for the oxidation of formaldehyde at low temperature. The in situ diffuse reflectance infrared Fourier transform results indicated that CO, formate and dioxymethylene species are the main intermediates over the Pd/CeO2-C catalyst, and the active O species is responsible for their decomposition and oxidation. This work may promote the practical application of high performance Pd-based catalysts for indoor HCHO purification and related catalytic processes.

机译：消除室内甲醛污染(一氧化碳)在室温下是高度需要改善环境,同时节约能源。Pd / CeO2催化剂不同形态的CeO2支持了调查他们的表现对一氧化碳氧化。nanocube (Pd / CeO2-C)表现出优良的催化剂商业CeO2相比催化活性和CeO2纳米棒。转化成二氧化碳和水在Pd / CeO2-C(0.64 wt % Pd)催化剂在体重每小时的空间36 000毫升g (1) h速度(1)在房间温度。证实了强大的界面交互Pd和CeO2-C之间支持保证很高比例的金属CeO2-C Pd表面和它的高色散,这是至关重要的在低甲醛的氧化温度。结果表明,红外傅里叶变换有限公司,甲酸和dioxymethylene物种主要中间体在Pd / CeO2-C催化剂,和活跃的物种负责他们的阿分解和氧化。促进高的实际应用室内一氧化碳Pd-based催化剂性能净化及相关催化过程。

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《Catalysis science & technology》 |2021年第20期|6732-6741|共10页
作者
Chen Yafeng; Jiang Guimin; Cui XiangzhiZhang ZuotaiHou Xinmei;
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作者单位

Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China;

Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China;

Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China;

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正文语种英语
中图分类汉语教学;
关键词
Oxidation; Room temperature; Environmental TemperatureCatalystsspace velocityfabricationFormaldehydeCatalyst activity;

机译：氧化;室温环境TemperatureCatalystsspacevelocityfabricationFormaldehydeCatalyst活动;

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1. Highly Efficient Photoelectrocatalytic Reduction of CO2 to Methanol by a p–n Heterojunction CeO2/ CuO/Cu Catalyst [J] . Zhengbin Pan, Ershuan Han, Jingui Zheng, 纳微快报：英文版 . 2020,第002期
2. Hydroxyl Enhanced Structured Pt/Nix/a-AlOOH Catalyst for Formaldehyde Oxidation at Room Temperature [J] . Shoudian Zhao, Qi Zhang, Guobing Zhao, 催化剂现代研究（英文） . 2020,第002期
3. Pd/CeO2–TiO2 catalyst for CO oxidation at low temperature：a TPR study with H2 and CO as reducing agents [O] . Huaqing Zhu, Zhangfeng Qin, 单文娟, 2004

机译：pd/CeO2–TiO2 catalyst for CO oxidation at low temperature：a TpR study with H2 and CO as reducing agents

Fabrication of Pd/CeO2 nanocubes as highly efficient catalysts for degradation of formaldehyde at room temperature

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