通过化学排序优化Pd‐Cu纳米合金的表面协调以增强氢化选择性

Key Points

• The aim is to investigate how chemical ordering in Pd-Cu nanoalloys affects their catalytic performance in hydrogenation.
• Controlled composition adjustments to tune chemical ordering
• Targeted H2 thermal treatment of catalysts
• Synchrotron X-ray absorption fine structure (XAFS) and X-ray total scattering analysis
• Reverse Monte Carlo (RMC) simulations to create atomic models
• Full acetylene conversion achieved at 100°C to 120°C across all catalysts
• Increased ethylene selectivity observed with enhanced chemical ordering
• Highly ordered Pd-Cu shows greater average surface Pd-Cu coordination
• Expanded mean surface Pd-Pd separations weaken ethylene binding and reduce re-adsorption