Although carbon-supported palladium catalysts have been generally used for the direct synthesis of H₂O₂ (DSHP), the low H₂O₂ selectivity remains a challenge. In this work, it was systematically studied how the sulfonated carbon surface affects the physicochemical properties of Pd during catalyst preparation, and thereby affects the catalytic activity of Pd/C for the DSHP reaction. Nano-sized Pd particles (about 2–3 nm) with a high Pd²⁺/Pd⁰ ratio resulted in a high H₂O₂ selectivity. The sulfonated carbon material acted as an efficient solid acid support and enhanced the H₂O₂ selectivity. Fine-tuning the Pd properties on the sulfonated carbon support significantly improved the H₂O₂ selectivity by as much as 87% in the absence of caustic promoters, which clearly demonstrates that the synergistic combination of the active metal properties and that of the carbon support are extremely important to realize a highly active and selective carbon-supported palladium catalyst for the DSHP reaction.

尽管碳负载的钯催化剂通常已经用于直接合成H ₂ O ₂（DSHP），但是低H ₂ O ₂选择性仍然是一个挑战。在这项工作中，系统地研究了磺化碳表面如何在催化剂制备过程中影响Pd的理化性质，从而影响Pd / C对DSHP反应的催化活性。具有高Pd ²⁺ / Pd ⁰比的纳米级Pd颗粒（约2-3 nm）导致高H ₂ O ₂选择性。磺化碳材料可作为有效的固体酸载体并增强H ₂ O ₂选择性。在没有苛性助催化剂的情况下，微调磺化碳载体上的Pd性质可将H ₂ O ₂选择性显着提高多达87％，这清楚地表明了活性金属属性和碳载体的协同组合对于实现用于DSHP反应的高活性和选择性碳载钯催化剂而言，这是极为重要的。