Publications by authors named "Haiqiang Mu"
Investigating the influence of atomic-scale self-limiting stress in CuAg@NiAg nanoparticle on CO electroreduction performance.
J Colloid Interface Sci
August 2025
Whether stress at the micro-structural level exhibited self-limiting characteristics similar to macroscopic conditions, thus affecting the performance of catalysts in relation to the scope of stress influence, remained a topic requiring further investigation. In this study, we designed a CuAg@NiAg core-shell structure to induce lattice expansion and generate stress at the core-shell interface through the simultaneous action of displacement and co-reduction reactions. By adjusting the shell thickness, we investigated the impact of atomic-scale stress influence range (self-limiting behavior) on catalytic performance.
View Article and Find Full Text PDFThe enhanced selectivity for C products in the electrochemical CO reduction reaction (ECORR) is critically dependent on the regulation of the elemental existence state on the surface of the electrocatalyst. In this study, CuO nanowires featuring multiple grain boundaries were successfully synthesized. Two distinct model catalysts were prepared: one through surface adsorption of Br (denoted as CuO_Br) and the other via surface bromination (denoted as CuO@CuBr).
View Article and Find Full Text PDFTuning N coordination environment in AgNC single atom catalysts for efficient electrochemical CO-to-Ethanol conversion.
J Colloid Interface Sci
October 2023
Article Synopsis
- - Researchers explored how changing the coordination environment of single-atom catalysts (SACs) affects their efficiency in electrocatalytic CO reduction, specifically using single-atom Ag on N-doped carbon with different nitrogen arrangements.
- - By adjusting the proportions of pyrrolic and pyridine nitrogen, they found that a catalyst with 40% pyrrolic N yielded a high Faradaic efficiency (FE) of 69.7% for CO formation, while a catalyst with 70.5% pyridine N achieved a stable FE of 40% for CHOH production.
- - The study provides insights into the roles of different nitrogen types, suggesting that pyrrolic N enhances CO conversion, while pyridine N
Article Synopsis
- The study focuses on developing effective cathode materials for the photoelectrochemical CO reduction reaction (PEC CO RR) to convert carbon monoxide into valuable products using high-energy photoelectrons.
- A coaxial ZnO@ZnSe heterostructure was created, enhanced by depositing metallic Bi nanoparticles on its surface, resulting in an efficient Bi/ZnO@ZnSe photocathode.
- This photocathode design features a large surface area for better mass transfer and captures high-energy photoelectrons effectively, achieving over 88.9% Faradaic efficiency in CO conversion while maintaining stability.
Cobalt-nitride-carbide (Co-N-C) catalysts are promising cost-efficient transition metal catalysts for electrocatalytic hydrogen evolution, but few works investigate the metal-support interaction (MSI) effect on hydrogen evolution reaction (HER) performance. Herein, efficient Co-N-C catalysts with controllable MSI between encapsulated Co nanoparticles and nitrogen-doped graphitic carbon nanosheets were synthesized via a facile organic-inorganic hybridization method. Results demonstrate that the Co-N-C catalyst with the coexistence of single-atom Co sites and Co nanoparticles prepared by 0.
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