Ultralow Pt Catalyst for Formaldehyde Removal: The Determinant Role of Support

Abstract

SummarySupported Pt catalyst has been intensively investigated for formaldehyde elimination owing to its superior reactivity at room temperature (RT). However, the high Pt content is challenging because of its high cost. Herein, we report PbO-supported Pt catalysts with only 0.1 wt % Pt, which can achieve complete conversion of formaldehyde and reliable stability at RT under demanding conditions. Both experiments and simulations demonstrate that PbO interacts strongly with the Pt species, resulting in tight Pb-O-Pt bonding at the metal/support interface and concomitant activation of the surface lattice oxygen of the support. Moreover, PbO exhibits an extremely high capacity of formaldehyde capture through methylene glycol chemisorption rather than the common hydroxyl-associated adsorption, presenting a different reaction mechanism because the active surface lattice oxygen in the vicinity of Pt species offers improved reactivity. This work provides a valuable example for the design of an efficient catalyst for formaldehyde and potentially oxidation of other carbohydrates.

Low-temperature combustion of methane over graphene templated Co3O4 defective-nanoplates

“…The catalytic combustion of methane was tested in a fixed bed quartz tube reactor (ID = 6 mm, L = 500 mm) at atmospheric pressure 43 . 100 mg catalyst (40–60 mesh) was packed in the middle of reactor with quartz wool layers on both ends of reactor.…”

Formaldehydes in Feed and Their Potential Interaction With the Poultry Gastrointestinal Tract Microbial Community–A Review

“…In general aldehydes are relatively ubiquitous in the environment originating not only as a natural compound but as an intermediary endogenous product in biological metabolism and other processes as well-generation from automobile exhaust gases and indoor environments from sources such as building materials and furniture (8–10). The chemistry and pathways for their formation have been extensively discussed in a review by O'Brien et al (8) and will not be discussed in detail in the current review.…”

Bubble-Assisted Three-Dimensional Ensemble of Nanomotors for Improved Catalytic Performance

“…Noble metal nanocrystals have been extensively investigated for achieving high efficiency and yield among organic catalysis (Chen et al., 2019, Dhakshinamoorthy et al., 2018, Jing et al., 2018, Stratakis and Garcia, 2012, Wang et al., 2018a, Wang et al., 2018b, Liu et al., 2019). Owing to the high surface energy, the nanometer-scale catalysts tend to aggregate during the reaction, resulting in catalyst deactivation and difficulties for recycling.…”

“…The propulsion and navigation of individual micro-/nanorobots supplied with various kinds of energies have been extensively investigated during the past two decades. Different from the actuation of the individual micro-/nanorobots, and the independent propulsion of multi-agents, the swarming motion control of a cluster of tiny agents can perform integral and reconfigurable transportation of the micro-/nanoagents with ultra-low agent loss during the motion by many external stimuli (Chen et al., 2017, Yu et al., 2017a, Yu et al., 2017b, Yu et al., 2018a, Yu et al., 2018b, Wang et al., 2018a, Wang et al., 2018b, Ahmed et al., 2017, Ibele et al., 2009, Lin et al., 2017, Manjare et al., 2015, Hong et al., 2010, Deng et al., 2018, Solovev et al., 2010a, Solovev et al., 2010b, Solovev et al., 2013, Mou et al., 2019, Yigit et al., 2019, Zhou et al., 2018, Wang et al., 2018a, Wang et al., 2018b). Magnetic-field-controlled swarming of micro-/nanorobots offered an efficient strategy for the directed actuation and steering of a cluster of nanoagents.…”

“…Magnetic-field-controlled swarming of micro-/nanorobots offered an efficient strategy for the directed actuation and steering of a cluster of nanoagents. In our recent works (Yu et al., 2018a, Yu et al., 2018b, Wang et al., 2018a, Wang et al., 2018b), we developed a novel strategy to integrally transport a cluster of micro-/nanoagents as a 2D collective for the delivery purpose with remote magnetic field control. However, attributed to the requirement of force balance between the magnetic attraction for maintaining the swarming pattern and the fluidic drag effect for the integral translational motion, the efficiency of the simple magnetic actuation to form the magnetic microswarm and move it as a 2D dynamic collective is very limited.…”