Reduction behavior of PdO-NiO/SiO: how Pd location affects cinnamaldehyde hydrogenation.

In this work, we study the reducibility of a PdO precursor placed by strong electrostatic adsorption on either NiO or SiO of NiO/SiO obtained by incipient wetness impregnation. The catalysts were characterized by HAADF-STEM, quasi- XPS, CO IR spectroscopy and H chemisorption as a function of the reduction temperature and evaluated for their performance in cinnamaldehyde hydrogenation. PdO on SiO requires reduction at higher temperatures to achieve appreciable rates of cinnamaldehyde hydrogenation.

Ce Promotion of InO for Electrochemical Reduction of CO to Formate.

InO is a promising electrocatalyst for CO electroreduction (COER) to formate. InO nanoparticles doped with Pd, Ni, Co, Zr, and Ce promoters using flame-spray pyrolysis were characterized and evaluated in a gas diffusion electrode for the COER. Doping results in slight shifts of the In binding energy as probed by XPS, which correlates with a change of the Faradaic efficiency to formate (FE) in the order Ce-doped InO > Zr-doped InO > InO > Pd-doped InO > Ni-doped InO > Co-doped InO.

Improving the performance of ASA in the DAC of 2,5-DMF and ethylene.

A variety of methods are employed to synthesize amorphous silica-alumina (ASA) to resolve the role of Al speciation and surface area in the catalytic performance in the Diels-Alder cycloaddition reaction of 2,5-dimethylfuran and ethylene to -xylene. ASA was prepared by homogeneous deposition-precipitation (HDP) of Al on ordered mesoporous silica, , SBA-15 and OMS prepared under hydrothermal synthesis conditions using an imidazole-based template, and one-step flame spray pyrolysis (FSP). IR spectroscopy and Al MAS NMR showed that the resulting ASA represented a set of materials with distinct textural and acidic properties.

Carbon dioxide and nitrate co-electroreduction to urea on CuOZnO.

Urea is a commonly used nitrogen fertiliser synthesised from ammonia and carbon dioxide using thermal catalysis. This process results in high carbon dioxide emissions associated with the required amounts of ammonia. Electrocatalysis provides an alternative method to urea production with reduced carbon emissions while utilising waste products like nitrate.

Structure Sensitivity of CO Hydrogenation on Ni Revisited.

Despite the large number of studies on the catalytic hydrogenation of CO to CO and hydrocarbons by metal nanoparticles, the nature of the active sites and the reaction mechanism have remained unresolved. This hampers the development of effective catalysts relevant to energy storage. By investigating the structure sensitivity of CO hydrogenation on a set of silica-supported Ni nanoparticle catalysts (2-12 nm), we found that the active sites responsible for the conversion of CO to CO are different from those for the subsequent hydrogenation of CO to CH.

Imaging the facet surface strain state of supported multi-faceted Pt nanoparticles during reaction.

Nanostructures with specific crystallographic planes display distinctive physico-chemical properties because of their unique atomic arrangements, resulting in widespread applications in catalysis, energy conversion or sensing. Understanding strain dynamics and their relationship with crystallographic facets have been largely unexplored. Here, we reveal in situ, in three-dimensions and at the nanoscale, the volume, surface and interface strain evolution of single supported platinum nanocrystals during reaction using coherent x-ray diffractive imaging.

Author Correction: Continuous scanning for Bragg coherent X-ray imaging.

An amendment to this paper has been published and can be accessed via a link at the top of the paper.

Continuous scanning for Bragg coherent X-ray imaging.

We explore the use of continuous scanning during data acquisition for Bragg coherent diffraction imaging, i.e., where the sample is in continuous motion.