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具有金属核的壳聚糖衍生的氮掺杂碳催化剂用于NH-NH键的氧化脱氢反应。

Chitosan-derived N-doped carbon catalysts with a metallic core for the oxidative dehydrogenation of NH-NH bonds.

作者信息

Thombal Priyanka Raju, Thombal Raju S, Han Sung Soo

机构信息

School of Chemical Engineering, Yeungnam University 280 Daehak-Ro Gyeongsan Gyeongbuk 38541 Republic of South Korea

出版信息

RSC Adv. 2020 Jan 2;10(1):474-481. doi: 10.1039/c9ra08146a. eCollection 2019 Dec 20.

DOI:10.1039/c9ra08146a
PMID:35492540
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9047065/
Abstract

Sustainable metal-encased (Ni-Co/Fe/Cu)@N-doped-C catalysts were prepared from bio-waste and used for the oxidative dehydrogenation reaction. A unique combination of bimetals, N doping, and porous carbon surfaces resulted in the formation of the effective "three-in-one" catalysts. These N-doped graphene-like carbon shells with bimetals were synthesized the complexation of metal salts with chitosan and the subsequent pyrolysis at 700 °C. A well-developed thin-layer structure with large lateral dimensions could be obtained by using Ni-Fe as the precursor. Importantly, the Ni-Fe@N-doped-C catalyst was found to be superior for the dehydrogenation of hydrazobenzene under additive/oxidant-free conditions compared to the conventional and other synthesized catalysts. Characterizations by TEM and XPS accompanied by BET analysis revealed that the enhanced catalytic properties of the catalysts arose from their bimetals and could be attributed to the graphitic shell structure and graphitic N species, respectively.

摘要

采用生物废料制备了可持续的金属包覆（Ni-Co/Fe/Cu）@N掺杂碳催化剂，并将其用于氧化脱氢反应。双金属、N掺杂和多孔碳表面的独特组合导致形成了有效的“三合一”催化剂。这些带有双金属的N掺杂类石墨烯碳壳是通过金属盐与壳聚糖的络合以及随后在700℃下的热解合成的。以Ni-Fe为前驱体可以获得具有大横向尺寸的发达薄层结构。重要的是，与传统催化剂和其他合成催化剂相比，发现Ni-Fe@N掺杂碳催化剂在无添加剂/氧化剂条件下对氢化偶氮苯的脱氢反应具有优越性（更出色）。TEM和XPS表征以及BET分析表明，催化剂催化性能的增强源于其双金属，分别归因于石墨壳结构和石墨态N物种。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/0ed07245ffaf/c9ra08146a-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/15564acab71f/c9ra08146a-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/795e8f88ab73/c9ra08146a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/0466a800186a/c9ra08146a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/1fb031071e2d/c9ra08146a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/804676db76f2/c9ra08146a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/6d67058ffc74/c9ra08146a-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/0ed07245ffaf/c9ra08146a-s3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/15564acab71f/c9ra08146a-s1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/795e8f88ab73/c9ra08146a-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/0466a800186a/c9ra08146a-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/1fb031071e2d/c9ra08146a-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/804676db76f2/c9ra08146a-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/6d67058ffc74/c9ra08146a-s2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/9c60/9047065/0ed07245ffaf/c9ra08146a-s3.jpg

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