电子结构不对称碳介导的Pd电荷重分布促进乙醇氧化反应

周鑫灿 王雪瑶 陈小康 兰笛 高宇庭 王晓霞 李道浩 张树超 张立杰 吴广磊

引用本文: 周鑫灿, 王雪瑶, 陈小康, 兰笛, 高宇庭, 王晓霞, 李道浩, 张树超, 张立杰, 吴广磊. 电子结构不对称碳介导的Pd电荷重分布促进乙醇氧化反应[J]. 物理化学学报, 2026, 42(7): 100287. doi: 10.1016/j.actphy.2026.100287 shu
Citation:  Xincan Zhou, Xueyao Wang, Xiaokang Chen, Di Lan, Yuting Gao, Xiaoxia Wang, Daohao Li, Shuchao Zhang, Lijie Zhang, Guanglei Wu. Charge redistribution on Pd mediated by electronically asymmetric carbon for boosting ethanol oxidation[J]. Acta Physico-Chimica Sinica, 2026, 42(7): 100287. doi: 10.1016/j.actphy.2026.100287 shu

电子结构不对称碳介导的Pd电荷重分布促进乙醇氧化反应

    通讯作者: Email: zhangshuchao@qdu.edu.cn (张树超); lijiezh@qdu.edu.cn (张立杰); wuguanglei@qdu.edu.cn/wuguanglei@qdu.edu.cn (吴广磊)
摘要: 作为一类具有应用前景的乙醇氧化反应(EOR)催化剂,Pd基材料仍然本征受限于表面电子结构在乙醇吸附与CH3CO中间体脱附之间的权衡关系。本文合成了负载于N/S共掺杂碳上的Pd催化剂(Pd@SNC),其中掺杂的S和N原子能够向Pd转移适量电子,从而赋予Pd更为适宜的电子结构。此外,d带中心的适度负移表明,该适宜的Pd电子结构不仅能够增强对乙醇和OH的吸附,还能够促进中间体(CH3CO*)的脱附,从而有利于反应动力学。结果表明,Pd@SNC表现出最高的EOR催化活性,其质量活性达到945.49 mA mgPd−1,明显优于Pd@NC和Pd@C。理论计算结果进一步表明,由于共掺杂N和S原子对Pd电子结构进行了有效调控,Pd@SNC在EOR过程中脱氢步骤表现出最低的反应能垒。

English

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