Hydrophilic Single-Atom Interface Empowered Pure Formic Acid Fuel Cells DOI
Kai Wei, Mingzi Sun,

Xiaoke Xi

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Single-atom catalysts (SACs), offering high mass activity and enhanced resistance to poisoning, are regarded as superior alternatives traditional Pt/Pd nanocatalysts for direct formic acid fuel cells (DFAFCs). However, failure toward operation in concentrated (FA), which is critical portable electronics, challenges their antipoisoning advantage highlights a missing part the understanding of reaction. We herein demonstrate that interfacial hydrophilicity SACs pivotal high-performance DFAFCs, enabling, first time, stable with pure FA (>99%). By incorporating transition metal single atoms (Co, Fe, Ni, Ru) into Ir/NC catalysts, we engineered highly hydrophilic interfaces, validated by molecular dynamics simulations experimental studies. The optimized IrCo/NC anode exhibited 342 times higher than nanoparticle-based represented SAC achieve peak power density (107.7 mW cm-2). A new reaction mechanism revealed, where CO acts reactive intermediate rather poison. Further, situ spectroscopy isotope kinetic analyses identified water involvement rate-determining step, underscoring role interface engineering DFAFC.

Language: Английский

Platinum-nickel bimetallic nanowire electrocatalyst enables methanol oxidation DOI
Zongze Li,

Kedi Yu,

Yumin Leng

et al.

Journal of Electroanalytical Chemistry, Journal Year: 2025, Volume and Issue: unknown, P. 118989 - 118989

Published: Feb. 1, 2025

Language: Английский

Citations

0
Recombinant Escherichia coli Utilizes Mild Hydrogen Sources for the Targeted Intracellular Synthesis of Palladium Nanoparticles and Whole-Cell-Catalyzed Aromatic Aldehyde Hydrogenation DOI
Yu Liu,

Shiyue Bi,

Zhanxin Song

et al.

ACS Applied Materials & Interfaces, Journal Year: 2025, Volume and Issue: unknown

Published: March 4, 2025

Metal-enzyme cascade catalysis effectively combines the broad reactivity of chemical with high selectivity biocatalysis, improving reaction efficiency and simplifying process flow through multiple sequential reactions in same system. The introduction exogenous palladium nanoparticles (Pd NPs) into Escherichia coli (E. coli) cells can significantly broaden range catalytic facilitated by biological enzymes. Additionally, targeted cytoplasmic synthesis Pd NPs enhances their utilization intracellular while also eliminating need for separating purifying metals However, current methods largely enable periplasmic space outer membrane. Moreover, hydrogen sources commonly used these methods─such as (H2) sodium borohydride (NaBH4)─carry safety risks. In this study, mechanism on side its were deeply investigated using a mild source, formate, combination genetic engineering preparation conditions. And constructed functional cell (Pd@E. could catalyze benzaldehyde hydrogenation, conversion rate 41.41% benzyl alcohol yield 17.68%, demonstrating considerable loading stability. This study provides reference constructing systems metal-enzyme cascades. Thus, it bolster development opportunities areas non-natural products drug provide ideas addressing drawbacks existing biosynthetic technologies.

Language: Английский

Citations

0
Efficient Photogenerated Carrier‐Assisted COads Removal via Schottky Barrier of PdSn/WO3 for Formic Acid Oxidation Reaction DOI
Wenhao Lu, Tingting Du, Shijie Jia

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 27, 2025

Abstract Limiting the formation of CO adsorbed species (CO ads ) or promoting its removal during formic acid oxidation reaction (FAOR) is essential to improving activity and stability Pd‐based catalysts. In this work, an innovative strategy proposed adjust Schottky barrier height (SBH) through band structure design for effective utilization photogenerated carriers remove , thereby FAOR performance Specifically, electronic Pd adjusted by loading on WO 3 nanosheets incorporating different amounts Sn reduce Fermi level pinning SBH. The accelerated migration electrons promotes accumulation holes valence . constructed effectively regulates catalyst optimizes adsorption energy intermediate CO, thus inhibiting indirect pathway. Therefore, optimal 1 /WO provides higher efficiency carrier‐assisted electrocatalytic FAOR, with a mass 2262.3 mA mg −1 outperforming most This work offers novel approach designing catalysts, combining modulation carrier assistance advance performance.

Language: Английский

Citations

0
Hydrophilic Single-Atom Interface Empowered Pure Formic Acid Fuel Cells DOI
Kai Wei, Mingzi Sun,

Xiaoke Xi

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Single-atom catalysts (SACs), offering high mass activity and enhanced resistance to poisoning, are regarded as superior alternatives traditional Pt/Pd nanocatalysts for direct formic acid fuel cells (DFAFCs). However, failure toward operation in concentrated (FA), which is critical portable electronics, challenges their antipoisoning advantage highlights a missing part the understanding of reaction. We herein demonstrate that interfacial hydrophilicity SACs pivotal high-performance DFAFCs, enabling, first time, stable with pure FA (>99%). By incorporating transition metal single atoms (Co, Fe, Ni, Ru) into Ir/NC catalysts, we engineered highly hydrophilic interfaces, validated by molecular dynamics simulations experimental studies. The optimized IrCo/NC anode exhibited 342 times higher than nanoparticle-based represented SAC achieve peak power density (107.7 mW cm-2). A new reaction mechanism revealed, where CO acts reactive intermediate rather poison. Further, situ spectroscopy isotope kinetic analyses identified water involvement rate-determining step, underscoring role interface engineering DFAFC.

Language: Английский

Citations

0