Abstract A material of graphitic carbon nitride-supported cobalt oxides (Co3O4/g-CN) was synthesized via a facile and cost-effective impregnation route as a high-performance catalyst for decomposition of N2O. For comparison, bare Co3O4 and other Co3O4 catalysts supported on activated carbon (AC) and γ-Al2O3 (Co3O4-A, Co3O4/AC, and Co3O4/γ-Al2O3, respectively) were also prepared. While g-CN was found to be active in the decomposition of N2O, AC and γ-Al2O3 were inert to this reaction. Co3O4/g-CN showed superior catalytic activity than the other catalysts, and concurrently exhibited much higher specific activity compared to Co3O4-A. The experimental results revealed that all examined catalysts had the spinel structure. The Co species could incorporate into the g-CN matrix/layers and bond to the g-CN matrix through Co-N coordination bonds. The excellent performance of Co3O4/g-CN was attributed to the high surface Co2+ content, massive surface oxygen species, facile electrons transfer from the catalyst to N2O domains, and the synergistic coupling effects among active species such as Co3+/Co2+ redox couple, Co-N, and nitrogen sites. The active Co3O4/g-CN catalyst additional activity tests were conducted with N2O gas contaminated with H2O, O2, or NO.

中文翻译：

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石墨氮化碳负载的氧化钴作为 N2O 分解的潜在催化剂

摘要 通过一种简便且具有成本效益的浸渍途径合成了石墨氮化碳负载的氧化钴 (Co3O4/g-CN) 材料作为 N2O 分解的高性能催化剂。为了比较，还制备了负载在活性炭 (AC) 和 γ-Al2O3（分别为 Co3O4-A、Co3O4/AC 和 Co3O4/γ-Al2O3）上的裸 Co3O4 和其他 Co3O4 催化剂。虽然发现 g-CN 在 N2O 的分解中具有活性，但 AC 和 γ-Al2O3 对该反应呈惰性。Co3O4/g-CN 表现出比其他催化剂优越的催化活性，同时比 Co3O4-A 表现出更高的比活性。实验结果表明，所有检测的催化剂都具有尖晶石结构。Co 物种可以结合到 g-CN 基质/层中，并通过 Co-N 配位键与 g-CN 基质结合。Co3O4/g-CN 的优异性能归因于高表面 Co​​2+ 含量、大量表面氧物种、容易从催化剂到 N2O 域的电子转移以及活性物种之间的协同耦合效应，如 Co3+/Co2+ 氧化还原对、Co -N 和氮位点。使用被 H2O、O2 或 NO 污染的 N2O 气体进行活性 Co3O4/g-CN 催化剂附加活性测试。