Metal promotion is the most widely adopted strategy for enhancing the hydrogenation functionality of an oxide catalyst. Typically, metal nanoparticles or dopants are located directly on the catalyst surface to create interfacial synergy with active sites on the oxide, but the enhancement effect may be compromised by insufficient hydrogen delivery to these sites. Here, we introduce a strategy to promote a ZnZrO_x methanol synthesis catalyst by incorporating hydrogen activation and delivery functions through optimized integration of ZnZrO_x and Pd supported on carbon nanotube (Pd/CNT). The CNT in the Pd/CNT + ZnZrO_x system delivers hydrogen activated on Pd to a broad area on the ZnZrO_x surface, with an enhancement factor of 10 compared to the conventional Pd-promoted ZnZrO_x catalyst, which only transfers hydrogen to Pd-adjacent sites. In CO₂ hydrogenation to methanol, Pd/CNT + ZnZrO_x exhibits drastically boosted activity—the highest among reported ZnZrO_x-based catalysts—and excellent stability over 600 h on stream test, showing potential for practical implementation.

金属促进是最广泛采用的增强氧化物催化剂加氢功能的策略。通常，金属纳米粒子或掺杂剂直接位于催化剂表面，以与氧化物上的活性位点产生界面协同作用，但增强效果可能会因输送到这些位点的氢气不足而受到影响。在这里，我们介绍了一种策略，通过优化集成负载在碳纳米管 (Pd/CNT) 上的ZnZrO _x和 Pd，结合氢活化和输送功能来促进 ZnZrO _{x甲醇合成催化剂。Pd/CNT + ZnZrO x}系统中的 CNT将 Pd 上激活的氢传递到 ZnZrO _{x上的广阔区域}表面，与传统的 Pd 促进的 ZnZrO _x催化剂相比，增强因子为 10，后者仅将氢转移到 Pd 相邻位点。在 CO ₂加氢制甲醇中，Pd/CNT + ZnZrO _{x表现出显着提高的活性（在已报道的 ZnZrO x}基催化剂中最高）和超过 600 小时的运行测试的出色稳定性，显示出实际应用的潜力。