C–X(X = Cl, Br, I) bond dissociation energy as a descriptor for the redispersion of sintered Au/AC catalysts

作     者：段新平 尹燕 田学林 柯金火 温兆军 郑建伟 胡梦麟 叶林敏 袁友珠 Xinping Duan;Yan Yin;Xuelin Tian;Jinhuo Ke;Zhaojun Wen;Jianwei Zheng;Menglin Hu;Linmin Ye;Youzhu Yuan

作者机构：厦门大学化学化工学院固体表面物理化学国家重点实验室醇醚酯化工清洁生产国家工程实验室福建厦门361005 

出 版 物：《Chinese Journal of Catalysis》 (催化学报（英文）)

年 卷 期：2016年第37卷第10期

页      面：1794-1803页

核心收录：

学科分类：081705[工学-工业催化] 0817[工学-化学工程与技术] 08[工学] 0703[理学-化学] 

基　　金：国家自然科学基金(21403178,21473145,21503173,91545115) 教育部创新团队发展计划(IRT_14R31) 福建省青年教师教学科研基金(JA15003) 

主　　题：GoldNanoparticleRedispersionHalohydrocarbonAcetylene hydrochlorination 

摘      要：Disintegration or redispersion of supported sintered gold nanoparticles （Au NPs） in the presence of alkyl halide can give catalyst regeneration or redispersion of sintered Au catalysts. The selectivity of alkyl halides, temperature and size distributions were investigated to elucidate the redispersion of Au NPs during halide-induced decomposition. This study proved that the alkyl halide induced the redispersion of sintered Au NPs which depended on the R-X （X = I, Br, CI） bond dissociation energy （BDE） and thus provided a simple descriptor for the regeneration of inactive supported Au cata- lysts. A correlation between the BDE of R-X and dispersion efficiency was established. The tendency for disintegration and redispersion followed the R-X BDE of the alkyl halide. Compared to alkyl chlorides and bromides, iodides were more efficient for redispersing sintered Au NPs. As a descriptor, the BDE of R-I played a crucial role in particle redispersion. These findings provided in- sights into the mechanism of organic halide-induced Au NP disintegration and the effect of the hal- ide type on the redispersion of sintered catalysts.