Interstitial Atomic Bi Charge‐Alternating Processor Boosts Twofold Molecular Oxygen Activation Enabling Rapid Catalytic Oxidation Reactions at Room Temperature

Abstract

Molecular O2 activation on metallic oxide‐based catalysts surfaces is pivotal for catalytic oxidation reactions but highly depends on the O2 activation pathways or mechanisms. Thus, comprehensively understanding the mechanism of efficient O2 activation is conducive to extending the fundamental principles for O2 activation theories and designing novel catalysts for catalytic oxidation reactions. In this study, it is declared that the interstitial atomic Bi (IA Bi) anchored in the lattice interstice of MnO2 (Bi/MnO2) is capable of triggering an alternative twofold O2 activation boosting the catalytic oxidation reactions at room temperature. Explicitly, the IA Bi facilely induces the local lattice distortion reconstructing the local charge landscape, thus weakening the O2 dissociation energy barrier by elongating the OO bond length. And, the charge‐alternating process engineered by the IA Bi drives the alternative twofold O2 activation of the adjacent lattice oxygen and adsorbs dangling oxygen assisted by the consecutive O2 replenishment. Conclusively, this study not only declares the role of IA Bi in driving the charge‐alternating process during the twofold O2 activation but also extends the fundamental principles toward O2 activation mechanisms for catalytic oxidation reactions via atomic makeup engineering.

Precisely Orientating Atomic Array in One-Dimension Tellurium Microneedles Enhances Intrinsic Piezoelectricity for an Efficient Piezo-Catalytic Sterilization

“…The ESR test was conducted to identify the possible ROS during the piezoelectricity on the plane engineered 1D Te microneedles. Hydroxyl radicals (OH•) were not detected in all the systems, while the characteristic peaks of singlet oxygen ( 1 O 2 ) and superoxide radicals (•O 2 – ) are shown in Figure a–d . The intensities of 1 O 2 and •O 2 – signals increased with the increase of the oscillation time.…”

Comparative Study of α- and β-MnO2 on Methyl Mercaptan Decomposition: The Role of Oxygen Vacancies

“…In addition, the presence of defects was further demonstrated using the inverse Fast Fourier Transform (FFT) pattern ( Figure 2 E,J). Significantly more lattice distortion can be clearly observed on the surface of α-MnO 2 ( Figure 2 D) (highlighted by red ovals), thus leading to more defects than β-MnO 2 [ 10 ]. Besides, severe blurring of the lattice fringes was also detected on α-MnO 2 than β-MnO 2 .…”

“…Methyl mercaptan (CH 3 SH), a representative S-VOC, is considered as an important air odor pollutant, which is harmful to the ecosystem and human health owing to its severe toxicity and low olfactory threshold [ 2 , 3 , 4 ]. In previous studies, various methods have been employed to eliminate CH 3 SH, such as adsorption [ 5 , 6 ], biodegradation [ 7 ], photocatalytic oxidation [ 8 ], and catalytic oxidation [ 9 , 10 ]. However, these remediation technologies suffer from secondary pollution because of incomplete removal and high cost.…”

Electron Transfer Trade-offs in MOF-Derived Cobalt-Embedded Nitrogen-Doped Carbon Nanotubes Boost Catalytic Ozonation for Gaseous Sulfur-Containing VOC Elimination

“…With a continuous catalytic ozonation reaction, COO – species vibration peaks at 1588 and 1390 cm –1 and CO vibration peak of carbonate species at 1691 cm –1 gradually become stronger . The formation of new product peaks indicates that the CS bond of the CH 3 SH or CH 3 SO 3 – species is broken, in which the methyl part is further oxidized to carboxylic acids and other products, and the sulfur species are finally converted to SO 4 2– deposited on the catalyst surface . From Figure d, CH 3 SO 3 – increased rapidly in the first 20 min of O 3 catalytic reaction and then tended to be stable, while the COO – species and SO 4 2– signal values continued to strengthen, indicating that CH 3 SO 3 – was an intermediate species of the CH 3 SH decomposition reaction.…”

“…53 The formation of new product peaks indicates that the C�S bond of the CH 3 SH or CH 3 SO 3 − species is broken, in which the methyl part is further oxidized to carboxylic acids and other products, and the sulfur species are finally converted to SO 4 2− deposited on the catalyst surface. 54 From Figure 3d . Carboxylic acids (HCOO − ) were unstable, and eventually they would be oxidized to H 2 O and CO 2 .…”