Solar-driven production of hydrogen and acetaldehyde from ethanol on Ni-Cu bimetallic catalysts with solar-to-fuels conversion efficiency up to 3.8 %
Solar-driven production of hydrogen and acetaldehyde from ethanol on Ni-Cu bimetallic catalysts with solar-to-fuels conversion efficiency up to 3.8 %
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太阳能驱动%20产量%20of%20氢%20and%20乙醛%20from%20乙醇%20on%20Ni-Cu%20双金属%20催化剂%20with%20太阳能-燃料%20转化%20效率%20up%20to%203.8%20%
DOI：
10.1016/j.apcatb.2020.118965
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发表时间：
2020-09-05
影响因子：
22.1
通讯作者：
Ye, Jinhua
中科院分区：
文献类型：
--
作者：
Luo, Shunqin;Song, Hui;Ye, Jinhua
乙醇催化脱氢被认为是一种有前途的生产有价值的化学原料的方法，但其工业化受到高能耗的影响。在这里，我们提出了一个有效的太阳能驱动的乙醇脱氢过程中，使用低成本的Ni-Cu双金属催化剂的高产率和选择性生产H-2和乙醛。在聚焦模拟太阳光的照射下，在不需要额外热能输入的情况下，获得了176.6 mmol g（催化剂）（-1）h（-1）的H-2产率和较高的太阳能-燃料转化效率（3.8%），这远高于以往报道的任何光催化乙醇脱氢系统。机理研究表明，光热加热和热载流子产生的Ni-Cu催化剂负责高活性。Cu纳米粒子产生的热电子可以迁移到Ni原子上，有利于载流子的分离和吸附物的活化。这项研究为太阳能转换技术和先进的成本效益工业过程开辟了一条有前途的道路。
Catalytic ethanol dehydrogenation is recognized as a promising approach to produce valuable chemical stocks, yet its industrialization suffers from high energy consumption. Here, we present an efficient solar-driven ethanol dehydrogenation process using a low-cost Ni-Cu bimetallic catalyst for the high-yield and selective production of H-2 and acetaldehyde. Under the irradiation of focused simulated solar light, 176.6 mmol g(catalyst)(-1) h(-1) of H-2 production rate with a high solar-to-fuel conversion efficiency (3.8 %) was achieved without additional thermal energy input, which is far more efficient than any previously reported photocatalytic ethanol dehydrogenation systems. Mechanistic investigations revealed that photothermal heating and hot carrier generation over Ni-Cu catalysts took responsibilities for the high activity. Hot electrons generated from Cu nanoparticles could migrate to Ni atoms, which simultaneously favored the separation of charge carriers and the activation of adsorbates. This study opens a promising pathway toward solar-energy conversion technology and advanced cost-effective industrial processes.