Xiaohui He

ZIF-derived Co-NC@PVP catalysts show excellent performance in selective hydrogenation of aromatic derivatives.

The catalytic performance of single-atom Pt ₁ /Co ₃ O ₄ catalysts in the selective hydrogenation of cinnamaldehyde (CAL) is systematically investigated with a focus on crystal facet effects.

Liquid organic hydrogen carriers (LOHCs) are promising materials for safe, reversible, and high-density hydrogen storage. Atomically dispersed bimetallic Pt–Sn nanocluster catalysts supported on TiO₂ (Pt–Sn/TiO₂) were developed to enhance the hydrogenation step in the toluene-methylcyclohexane cycle, a model LOHC system. Compared with monometallic Pt/TiO₂ and Sn/TiO₂, Pt–Sn/TiO₂ exhibited superior hydrogenation performance. Mechanistic studies, including X-ray photoelectron spectroscopy, kinetic analysis, and H₂-D₂ exchange experiments, revealed that Sn incorporation modulates the electronic structure of Pt, enhancing H₂ activation and spillover. These findings provide insights into the rational design of atomically dispersed bimetallic nanocluster catalysts for efficient and durable hydrogen storage in LOHC-based systems.

The direct synthesis of H ₂ O ₂ is considered an atom‐efficient, environmentally friendly, and sustainable alternative to replace the current industrial route of the anthraquinone oxidation process. To date a viable direct replacement for the current industrial method of H ₂ O ₂ production has yet to emerge, owing to the strong dissociation abilities of traditional Pd‐based catalysts for both H ₂ and O ₂ , which results in the over hydrogenation of H ₂ O ₂ and limited catalytic activity. To address these concerns, this work outlines a novel non‐Pd‐based catalyst (Pt ₁ Au _n /TiO ₂ ), consisting of spatially separated H ₂ and O ₂ activation sites, which offers H ₂ O ₂ selectivity (∼100%) and productivity (128.6 mol·g _N.M. ⁻¹ ·h ⁻¹ ), in excess of state‐of‐the‐art formulations. Crucially, via consecutive reactions, this system achieves net H ₂ O ₂ concentrations approaching 4 wt.%, which is double that generated in the initial stages of the Anthraquinone Oxidation Process. A detailed mechanistic study indicates that Pt single atoms selectively dissociate H ₂ , while Au nanoparticles stabilize non‐dissociative *O ₂ ⁻ species. The H ₂ O ₂ formation proceeds through CH ₂ O‐mediated hydrogen transfer, generating a hydrogen carrier (*CH ₂ OH) that subsequently reacts with *O ₂ ⁻ to produce H ₂ O ₂ .

The direct synthesis of H ₂ O ₂ is considered an atom‐efficient, environmentally friendly, and sustainable alternative to replace the current industrial route of the anthraquinone oxidation process. To date a viable direct replacement for the current industrial method of H ₂ O ₂ production has yet to emerge, owing to the strong dissociation abilities of traditional Pd‐based catalysts for both H ₂ and O ₂ , which results in the over hydrogenation of H ₂ O ₂ and limited catalytic activity. To address these concerns, this work outlines a novel non‐Pd‐based catalyst (Pt ₁ Au _n /TiO ₂ ), consisting of spatially separated H ₂ and O ₂ activation sites, which offers H ₂ O ₂ selectivity (∼100%) and productivity (128.6 mol·g _N.M. ⁻¹ ·h ⁻¹ ), in excess of state‐of‐the‐art formulations. Crucially, via consecutive reactions, this system achieves net H ₂ O ₂ concentrations approaching 4 wt.%, which is double that generated in the initial stages of the Anthraquinone Oxidation Process. A detailed mechanistic study indicates that Pt single atoms selectively dissociate H ₂ , while Au nanoparticles stabilize non‐dissociative *O ₂ ⁻ species. The H ₂ O ₂ formation proceeds through CH ₂ O‐mediated hydrogen transfer, generating a hydrogen carrier (*CH ₂ OH) that subsequently reacts with *O ₂ ⁻ to produce H ₂ O ₂ .

Propane dehydrogenation (PDH), which produces propylene and by‐produces hydrogen, attracts considerable attention in the chemical industry. Alkali metals, budget friendly and commonly used as additives to optimize the performance of Pt‐based alloy catalysts, are extensively utilized in the PDH industry. Herein, the structure and catalytic performance of the commercial catalyst (PtK₂/θ‐Al₂O₃) and contrast samples (Pt_0.3K_0.8/θ‐Al₂O₃‐N and Pt_0.3/θ‐Al₂O₃) are analyzed. According to the catalytic test, the PtK₂/θ‐Al₂O₃ exhibits better catalytic performance, which achieves >95% propylene selectivity and maintaining a high propane yield (>36%) during stability testing. Observations reveal that the initial propylene selectivity of the Pt‐based catalysts is inversely correlated with the total acidity and strong acid site content. The introducing of K element significantly reduces the acidity of the catalyst and enhances the propylene selectivity. Moreover, the presence of Cl⁻, co‐introduced with K, improves the catalytic stability, while the slight increase in the acidity of catalysts decreases the propylene selectivity. The enrichment of the electron density of PtK₂ nanoparticles contributes to the improvement of catalytic performance. Density functional theory calculations suggest that lower propylene adsorption energy and higher barrier for propylene deep dehydrogenation reaction on the PtK₂‐(100) surface enhance the propylene selectivity of the PtK₂/θ‐Al₂O₃ catalyst.

Silicoaluminate zeolites have relatively strong Brönsted (B) acid properties that can easily lead to deep cracking reactions, making them less favourable as carriers for propane dehydrogenation. Here, we utilise zincosilicate zeolite with less B‐acid produced by the introduction of the heteroatom Zn into the framework as a carrier, followed by simultaneous ion exchange (IE) of M monometallic or PtM bimetallic (M=Cu, Zn and Ga, etc.). The optimized PtZn/Zn‐4 exhibits a superior propane dehydrogenation performance over PtCu/Zn‐4 and PtGa/Zn‐4, which can achieve a propane conversion of about 30 % in a pure propane atmosphere at 550 °C and can be operated for at least 168 h without significant deactivation. Characterization techniques such as spherical aberration corrected transmission electron microscopy, in situ X‐ray photoelectron spectroscopy, and in situ diffuse reflectance infrared fourier transform spectroscopy with different gas adsorptions are used to investigate these PtM@zeolite catalysts in order to deepen the understanding of acid site identification, promoter effect and catalysis.