HCl-Tolerant HPO/RuO-CeO Catalysts for Extremely Efficient Catalytic Elimination of Chlorinated VOCs.

Environ Sci Technol

Key Laboratory for Advanced Materials, Research Institute of Industrial Catalysis, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.

Published: March 2021

AI Article Synopsis

  • Researchers improved the performance of the CeO catalyst for breaking down harmful chlorinated volatile organic compounds (Cl-VOCs) by combining metal doping and phosphate surface modification.
  • Metal doping enhanced CeO’s ability to catalyze reactions and reduced unwanted byproduct formation, but it led to more complex polychlorinated byproducts.
  • The phosphate layer stabilized the catalyst significantly, particularly the phosphate-functionalized RuO-CeO, making it highly effective and resistant to deactivation, thus representing a major advancement in Cl-VOC removal technology.

Article Abstract

Bulk metal doping and surface phosphate modification were synergically adopted in a rational design to upgrade the CeO catalyst, which is highly active but easily deactivated for the catalytic oxidation of chlorinated volatile organic compounds (Cl-VOCs). The metal doping increased the redox ability and defect sites of CeO, which mostly promoted catalytic activity and inhibited the formation of dechlorinated byproducts but generated polychlorinated byproducts. The subsequent surface modification of the metal-doped CeO catalysts with nonmetallic phosphate completely suppressed the formation of polychlorinated byproducts and, more importantly, enhanced the stability of the surface structure by forming a chainmail layer. A highly active, durable, and selective catalyst of phosphate-functionalized RuO-CeO was the most promising among all the metal-doped (Ru, Pd, Pt, Cr, Mn, Fe, Co, and Cu) CeO catalysts investigated owing to the prominent chemical stability of RuO and its superior versatility in the catalytic oxidation of different kinds of Cl-VOCs and other typical pollutants, including dimethyl sulfide, CO, and CH. Moreover, the chemical stability of the catalyst, including its bulk and surface structural stability, was investigated by combining intensive treatment with HCl/HO or HCl with subsequent ex situ ultraviolet-visible light Raman spectroscopy and confirmed the superior resistance to Cl poisoning of the phosphate-functionalized RuO-CeO. This work exemplifies a promising strategy for developing ideal catalysts for the removal of Cl-VOCs and provides a catalyst with the superior catalytic performance in Cl-VOC oxidation to date.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acs.est.0c08256DOI Listing

Publication Analysis

Top Keywords

metal doping
8
highly active
8
catalytic oxidation
8
polychlorinated byproducts
8
metal-doped ceo
8
ceo catalysts
8
phosphate-functionalized ruo-ceo
8
chemical stability
8
catalytic
5
hcl-tolerant hpo/ruo-ceo
4

Similar Publications

Due to the high catalytic activity and stability for oxygen reduction reaction, N-coordinated Fe-Cu dual-metal doped carbon material (FeCu-N-C) is considered to be one of the promising electrode materials for metal-air battery and fuel cells. Herein, FeCu-N-C dual-metal catalysts was synthesized by an adsorption-calcination strategy. The prepared FeCu-N-C exhibited high activity and stability both in alkaline and acidic media.

View Article and Find Full Text PDF

A Dynamic Metal-Organic Radical Emission System.

Angew Chem Int Ed Engl

December 2024

Donghua University - Songjiang Campus: Donghua University, College of chemistry, chemical engineering and biotechnology, 2999 Renmin North Road, Shanghai, 201620, Shanghai, CHINA.

Developing new organic radical emission systems and regulating their luminescence properties presents a significant challenge. Herein, we build dynamic and multi-emission band radical luminescence systems by co-assembling inorganic metal salts with carbonyl compounds in ionic liquids. After the assembling, dual-band, and excitation wavelength-dependent emission was observed upon light irradiation, one emission band originates from carbonyl radical after light irradiation, the other band from the ligand-metal charge transfer (LMCT) state, which benefits from the charge transfer from the radicals to the metal salts.

View Article and Find Full Text PDF

Electrochemiluminescence (ECL) microscopy has emerged as a powerful technique for single-cell imaging owing to its unparalleled background-free imaging advantages. However, controlled intracellular ECL imaging remains challenging. Here, we developed a stimuli-responsive self-assembled DNA nanomachine that enables the ECL imaging of intracellular target biomolecules in single cells.

View Article and Find Full Text PDF

The absence of intrinsic magnetism in two-dimensional (2D) materials demands functionalization as necessary for broadening their applications. In this work, doping with transition metals (Mn and Fe) is proposed to modify the electronic and magnetic properties of a GeS monolayer. A pristine monolayer is an indirect gap semiconductor with an energy gap of 0.

View Article and Find Full Text PDF

Modifying the redox properties of transition metals within layered cathode materials represents a pivotal approach in the pursuit of high-performance cathode materials. The recent research has revealed a novel finding: the introduction of Mg into LiNiCoMnO leads to a shift in the oxidation sequence of transition metals during lithium extraction, with Co supplanting Ni as the primary oxidized species during the initial stages of lithium extraction. This alteration in the lattice constants and volume, among other structural parameters, serves to mitigate lattice stress during the charging and discharging cycles.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!