Publications by authors named "Shuaiwei Jiang"
Understanding the characteristics of interfacial hydroxyl (OH) at the solid/liquid electrochemical interface is crucial for deciphering synergistic catalysis. However, it remains challenging to elucidate the influences of spatial distance between interfacial OH and neighboring reactants on reaction kinetics at the atomic level. Herein, we visualize the distance-dependent synergistic interaction in heterogeneous dual-site catalysis by using ex-situ infrared nanospectroscopy and in situ infrared spectroscopy techniques.
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- The study investigates how adjusting the nonplanar metal coordination environment can affect the spin state of transition metal-based catalysts, particularly focusing on iron (Fe) in a tetrahedral arrangement altered by phosphorus (P) atoms.
- As the number of P atoms increases, the spin magnetic moment of the Fe atoms decreases significantly, indicating a linear relationship between P coordination and spin state properties.
- A strong correlation is found between the spin states of the Fe catalysts and their efficiency in catalyzing the oxygen reduction reaction, with an optimal activity at a medium spin state of 19% yielding a notable half-wave potential of 0.92 V.
Rational design of efficient methanol oxidation reaction (MOR) catalyst that undergo non-CO pathway is essential to resolve the long-standing poisoning issue. However, it remains a huge challenge due to the rather difficulty in maximizing the non-CO pathway by the selective coupling between the key *CHO and *OH intermediates. Here, we report a high-performance electrocatalyst of patchy atomic-layer Pt epitaxial growth on CeO nanocube (Pt ALs/CeO) with maximum electronic metal-support interaction for enhancing the coupling selectively.
View Article and Find Full Text PDFIn-depth comprehension and modulation of the electronic structure of the active metal sites is crucial to enhance their intrinsic activity of electrocatalytic oxygen evolution reaction (OER) toward anion exchange membrane water electrolyzers (AEMWEs). Here, we elaborate a series of amorphous metal oxide catalysts (FeCrO, CoCrO and NiCrO) with high performance AEMWEs by high-valent chromium dopant. We discover that the positive effect of the transition from low to high valence of the Co site on the adsorption energy of the intermediate and the lower oxidation barrier is the key factor for its increased activity by synchrotron radiation in-situ techniques.
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